NATIONAL INSTRUMENTS LabVIEW Kev sib txuas lus 802.11 Daim Ntawv Thov Kev Ua Haujlwm 2.1
Khoom Qhia: PXIe-8135
PXIe-8135 yog ib qho cuab yeej siv rau kev xa cov ntaub ntawv bidirectional hauv LabVIEW Kev sib txuas lus 802.11 Daim Ntawv Thov Kev Ua Haujlwm 2.1. Cov cuab yeej xav tau ob lub NI RF li, xws li USRP
RIO pab kiag li lawm los yog FlexRIO modules, yuav tsum tau txuas mus rau txawv host computers, uas yuav ua tau ib tug laptops, PCs, los yog PXI chasses. Kev teeb tsa tuaj yeem siv RF cables lossis kav hlau txais xov. Cov cuab yeej siv tau nrog PXI-based host systems, PC nrog PCI-based lossis PCI Express-based MXI adapter, lossis lub laptop nrog Express card-based MXI adapter. Tus tswv tsev yuav tsum muaj tsawg kawg yog 20 GB ntawm qhov chaw pub dawb thiab 16 GB ntawm RAM.
Cov Kev Xav Tau
Software
- Windows 7 SP1 (64-ntsis) lossis Windows 8.1 (64-ntsis)
- LabVIEW Kev sib txuas lus System Design Suite 2.0
- 802.11 Daim Ntawv Thov Kev Ua Haujlwm 2.1
Kho vajtse
Txhawm rau siv 802.11 Daim Ntawv Thov Kev Ua Haujlwm rau kev xa cov ntaub ntawv bidirectional, koj xav tau ob lub NI RF cov khoom siv - xws li USRP RIO cov khoom siv nrog 40 MHz, 120 MHz, lossis 160 MHz bandwidth, lossis FlexRIO modules. Cov khoom siv yuav tsum tau txuas nrog cov khoos phis tawj sib txawv, uas tuaj yeem yog lub laptops, PCs, lossis PXI chassis. Daim duab 1 qhia txog kev teeb tsa ntawm ob lub chaw nres tsheb los ntawm kev siv RF cables (sab laug) lossis kav hlau txais xov (txoj cai).
Table 1 nthuav qhia cov khoom siv uas yuav tsum tau ua nyob ntawm qhov kev xaiv xaiv.
| Kev teeb tsa | Ob qho kev teeb tsa | USRP RIO teeb tsa | FlexRIO FPGA / FlexRIO RF adapter module teeb | |||||
| Tus tswv
PC |
SMA
Kab |
Attenuator | Kav hlau txais xov | USRP
ntaus ntawv |
MXI
Adapter |
FlexRIO FPGA UAS
module |
FlexRIO Adapter
module |
|
| Ob yam khoom siv, cabled | 2 | 2 | 2 | 0 | 2 | 2 | 2 | 2 |
| Ob yam khoom siv, dhau-
huab cua [1] |
2 | 0 | 0 | 4 | 2 | 2 | 2 | 2 |
- Controllers: Pom zoo-PXIe-1085 Chassis lossis PXIe-1082 Chassis nrog PXIe-8135 Controller ntsia.
- SMA cable: Poj niam / poj niam cable uas suav nrog USRP RIO ntaus ntawv.
- Kav hlau txais xov: Xa mus rau "RF Multi Station Mode: Over-the-Air Transmission" seem kom paub ntau ntxiv txog hom no.
- USRP RIO ntaus ntawv: USRP-2940/2942/2943/2944/2950/2952/2953/2954 Software Defined Radio Reconfigurable Devices with 40 MHz, 120 MHz, or 160 MHz bandwidth.
- Attenuator nrog 30 dB attenuation thiab txiv neej / poj niam SMA connectors uas suav nrog USRP RIO ntaus ntawv.
Lus Cim: Rau FlexRIO / FlexRIO adapter module teeb, lub attenuator tsis tas yuav tsum tau. - FlexRIO FPGA module: PXIe-7975/7976 FPGA Module rau FlexRIO
- FlexRIO adapter module: NI-5791 RF Adapter Module rau FlexRIO
Cov lus pom zoo ua ntej xav tias koj siv PXI-based host systems. Koj tuaj yeem siv lub PC nrog PCI-based lossis PCI Express-based MXI adapter, lossis lub laptop nrog Express card-based MXI adapter.
Xyuas kom koj tus tswv tsev muaj tsawg kawg yog 20 GB ntawm qhov chaw pub dawb thiab 16 GB ntawm RAM.
- Ceeb Toom: Ua ntej siv koj cov khoom siv kho vajtse, nyeem tag nrho cov ntaub ntawv ntawm cov khoom kom ntseeg tau tias ua raws li kev nyab xeeb, EMC, thiab ib puag ncig cov cai.
- Ceeb Toom: Txhawm rau kom ntseeg tau tias EMC kev ua tau zoo, ua haujlwm ntawm RF cov khoom siv nrog cov hlua thaiv thiab cov khoom siv.
- Ceeb Toom: Txhawm rau kom ntseeg tau tias EMC kev ua tau zoo, qhov ntev ntawm tag nrho cov I / O cables tshwj tsis yog rau cov uas txuas nrog GPS kav hlau txais xov input ntawm USRP ntaus ntawv yuav tsum tsis pub ntev tshaj 3 m (10 ft.).
- Ceeb Toom: USRP RIO thiab NI-5791 RF cov cuab yeej tsis raug pom zoo lossis muaj ntawv tso cai rau kev sib kis saum huab cua uas siv lub kav hlau txais xov. Yog li ntawd, kev khiav hauj lwm cov khoom no nrog lub kav hlau txais xov yuav ua txhaum txoj cai hauv zos. Xyuas kom tseeb tias koj tau ua raws li tag nrho cov cai hauv zos ua ntej ua haujlwm cov khoom no nrog lub kav hlau txais xov.
Kev teeb tsa
- Ob yam khoom siv, cabled
- Ob lub cuab yeej, tshaj huab cua [1]
Hardware Configuration Options
Table 1 Yuav tsum tau kho vajtse Accessories
| Cov khoom siv | Ob qho kev teeb tsa | USRP RIO teeb tsa |
|---|---|---|
| SMA Cable | 2 | 0 |
| Kav hlau txais xov Attenuator | 2 | 0 |
| USRP ntaus ntawv | 2 | 2 |
| MXI Adapter | 2 | 2 |
| FlexRIO FPGA module | 2 | N/A |
| FlexRIO Adapter module | 2 | N/A |
Cov lus qhia siv khoom
- Xyuas kom meej tias tag nrho cov ntaub ntawv khoom tau raug nyeem thiab nkag siab kom ua raws li kev nyab xeeb, EMC, thiab ib puag ncig cov cai.
- Xyuas kom cov khoom siv RF txuas nrog cov khoos phis tawj sib txawv uas ua tau raws li qhov yuav tsum tau ua.
- Xaiv qhov kev xaiv kho vajtse tsim nyog thiab teeb tsa cov khoom siv ntxiv raws li Table 1.
- Yog tias siv lub kav hlau txais xov, xyuas kom ua raws li tag nrho cov kev cai hauv zos ua ntej siv cov khoom no nrog lub kav hlau txais xov.
- Txhawm rau kom ntseeg tau tias EMC kev ua haujlwm tau teev tseg, ua haujlwm ntawm RF cov khoom siv tsuas yog nrog cov hlua khi thiab cov khoom siv.
- Txhawm rau kom ntseeg tau tias EMC kev ua tau zoo, qhov ntev ntawm tag nrho cov I / O cables tshwj tsis yog rau cov uas txuas nrog GPS kav hlau txais xov input ntawm USRP ntaus ntawv yuav tsum tsis pub ntev tshaj 3 m (10 ft.).
To taub cov Cheebtsam ntawm no Sampua Project
Qhov project yog suav nrog LabVIEW host code thiab LabVIEW FPGA code rau qhov txhawb USRP RIO lossis FlexRIO kho vajtse lub hom phiaj. Cov txheej txheem nplaub tshev cuam tshuam thiab cov khoom ntawm qhov project tau piav qhia nyob rau hauv ntu ntu tom ntej.
Cov Qauv Folder
Txhawm rau tsim ib qho piv txwv tshiab ntawm 802.11 Application Framework, tso LabVIEW Communications System Design Suite 2.0 los ntawm xaiv LabVIEW Kev sib txuas lus 2.0 los ntawm Start menu. Los ntawm Project Templates ntawm qhov pib qhov project tab, xaiv Daim Ntawv Thov Cov Qauv. Txhawm rau pib qhov project, xaiv:
- 802.11 Tsim USRP RIO v2.1 thaum siv USRP RIO li
- 802.11 Tsim FlexRIO v2.1 thaum siv FlexRIO FPGA / FlexRIO modules
- 802.11 Simulation v2.1 los khiav FPGA code ntawm lub cev transmitter (TX) thiab receiver (RX) teeb liab ua hauv hom simulation. Cov lus qhia ntsig txog ntawm qhov project simulation yog txuas rau nws.
Rau 802.11 Tsim cov phiaj xwm, cov hauv qab no files thiab folders yog tsim nyob rau hauv cov ntaub ntawv teev tseg:
- 802.11 Tsim USRP RIO v2.1.lvproject / 802.11 Tsim FlexRIO RIO v2.1.lvproject —This project file muaj cov ntaub ntawv hais txog qhov txuas subVIs, lub hom phiaj thiab tsim cov lus qhia tshwj xeeb.
- 802.11 Host.gvi—Tus tswv tsev saum toj kawg nkaus VI siv qhov chaw nres tsheb 802.11. Tus tswv interfaces nrog me ntsisfile tsim los ntawm qib FPGA VI, 802.11 FPGA STA.gvi, nyob rau hauv lub hom phiaj tshwj xeeb subfolder.
- Tsim-Cov ntawv tais ceev no muaj cov txheej txheem ua ntejfiles rau lub hom phiaj xaiv ntaus ntawv.
- Common—Lub tsev qiv ntawv muaj cov generic subVIs rau tus tswv tsev thiab FPGA uas tau siv hauv 802.11 Daim Ntawv Thov Kev Pabcuam. Cov cai no suav nrog kev ua lej thiab hom kev hloov pauv.
- FlexRIO/USRP RIO- Cov folders no muaj lub hom phiaj tshwj xeeb kev siv ntawm tus tswv tsev thiab FPGA subVIs, uas suav nrog cov cai los teeb tsa qhov nce thiab zaus. Cov cai no feem ntau hloov kho los ntawm cov phiaj xwm tshwj xeeb streaming sampua project. Lawv kuj muaj cov hom phiaj tshwj xeeb saum toj kawg nkaus FPGA VIs.
- 802.11 v2.1—Lub nplaub tshev no suav nrog 802.11 kev ua haujlwm nws tus kheej tau muab cais ua ob peb FPGA folders thiab cov npe tswv tsev.
Cheebtsam
802.11 Application Framework muab lub sijhawm tiag tiag ntawm lub sijhawm orthogonal zaus-division multiplexing (OFDM) lub cev txheej (PHY) thiab kev tswj hwm kev nkag mus rau xov xwm (MAC) rau kev siv IEEE 802.11-based system. 802.11 Application Framework LabVIEW qhov project siv lub functionality ntawm ib qho chaw nres tsheb, nrog rau receiver (RX) thiab transmitter (TX) functionality.
Nqe lus hais txog kev ua raws cai thiab kev sib txawv
802.11 Application Framework yog tsim los ua raws li IEEE 802.11 specifications. Txhawm rau kom tus qauv tsim tau yooj yim hloov kho, 802.11 Daim Ntawv Thov Kev Ua Haujlwm tsom mus rau cov haujlwm tseem ceeb ntawm IEEE 802.11 tus qauv.
- 802.11a- (Legacy hom) thiab 802.11ac- (High Throughput mode) ua raws PHY
- Kev cob qhia teb raws li pob ntawv nrhiav kom pom
- Teeb liab thiab cov ntaub ntawv teb encoding thiab decoding
- Clear Channel Assessment (CCA) raws li lub zog thiab teeb pom kev zoo
- Cov neeg nqa khoom nkag siab ntau yam kev nkag mus nrog kev sib tsoo sib tsoo (CSMA / CA) txheej txheem suav nrog kev xa rov qab
- Random Backoff txheej txheem
- 802.11a thiab 802.11ac raws MAC cov khoom siv los txhawb kev thov-rau-xa / meej-rau-xa (RTS / CTS), Cov ntaub ntawv ncej, thiab kev lees paub (ACK) ncej xa tawm
- ACK tiam nrog 802.11 IEEE-raws li kev sib cuam tshuam luv luv (SIFS) lub sijhawm (16 µs)
- Network allocation vector (NAV) txhawb nqa
- MAC raws tu qauv cov ntaub ntawv chav tsev (MPDU) tiam thiab ntau qhov chaw nyob
- L1 / L2 API uas tso cai rau cov ntawv thov sab nraud siv cov haujlwm MAC sab saud xws li koom nrog cov txheej txheem nkag mus rau cov haujlwm ntawm nruab nrab thiab qis MAC
802.11 Application Framework txhawb nqa cov yam ntxwv hauv qab no: - Lub sijhawm tiv thaiv ntev nkaus xwb
- Ib qho kev tawm tswv yim ib leeg tso zis (SISO) architecture, npaj rau ntau qhov kev tawm tswv yim ntau-tso tawm (MIMO) teeb tsa
- VHT20, VHT40, thiab VHT80 rau tus qauv 802.11ac. Rau 802.11ac 80 MHz bandwidth, kev txhawb nqa tsuas yog txwv rau kev hloov pauv thiab coding scheme (MCS) tus lej 4.
- Aggregated MPDU (A-MPDU) nrog ib leeg MPDU rau tus qauv 802.11ac
- Packet-by-packet automatic nce tswj (AGC) tso cai rau kev sib kis ntawm huab cua thiab txais tos.
Mus saib ni.com/info thiab nkag mus rau Info Code 80211AppFWManual kom nkag mus rau LabVIEW Kev Sib Txuas Lus 802.11 Daim Ntawv Thov Kev Ua Haujlwm Rau Cov Lus Qhia ntxiv txog 802.11 Daim Ntawv Thov Kev Tsim Qauv.
Khiav no Sampua Project
802.11 Daim Ntawv Thov Kev Pabcuam txhawb nqa kev sib cuam tshuam nrog cov chaw nres tsheb tsis txaus ntseeg, tom qab ntawd hu ua RF Multi Station Hom. Lwm hom kev ua haujlwm tau piav qhia nyob rau hauv "Kev Ua Haujlwm Ntxiv Ntxiv thiab Kev Xaiv Cov Kev Xaiv" ntu. Hauv RF Multi Station Hom, txhua qhov chaw nres tsheb ua haujlwm ua ib qho khoom siv 802.11. Cov lus piav qhia hauv qab no xav tias muaj ob lub chaw nres tsheb ywj pheej, txhua tus khiav ntawm nws tus kheej RF ntaus ntawv. Lawv raug xa mus rau chaw nres tsheb A thiab chaw nres tsheb B.
Configuring Hardware: Cabled
Nyob ntawm kev teeb tsa, ua raws li cov kauj ruam hauv qhov "Configuring USRP RIO Setup" lossis "Configuring FlexRIO/FlexRIO Adapter Module Setup" section.
Configuring USRP RIO System
- Xyuas kom tseeb tias USRP RIO cov cuab yeej txuas tau zoo nrog lub tshuab ua haujlwm ua haujlwm LabVIEW Communications System Design Suite.
- Ua kom tiav cov kauj ruam hauv qab no los tsim kev sib txuas RF raws li qhia hauv daim duab 2.
- Txuas ob 30 dB attenuators rau RF0 / TX1 chaw nres nkoj ntawm Chaw nres tsheb A thiab Chaw nres tsheb B.
- Txuas qhov kawg ntawm lub attenuators rau ob lub RF cables.
- Txuas lwm qhov kawg ntawm RF cable los ntawm Chaw nres tsheb A mus rau RF1 / RX2 chaw nres nkoj ntawm Chaw nres tsheb B.
- Txuas lwm qhov kawg ntawm RF cable los ntawm Chaw Nres Nkoj B mus rau RF1 / RX2 chaw nres nkoj ntawm Chaw nres tsheb A.
- Fais fab ntawm USRP li.
- Fais fab ntawm lub host systems.
RF cables yuav tsum txhawb kev khiav hauj lwm zaus.
Configuring FlexRIO System
- Xyuas kom tseeb tias cov khoom siv FlexRIO tau txuas nrog rau cov tswv tsev ua haujlwm LabVIEW Communications System Design Suite.
- Ua kom tiav cov kauj ruam hauv qab no los tsim kev sib txuas RF raws li qhia hauv daim duab 3.
- Txuas lub TX chaw nres nkoj ntawm chaw nres tsheb A rau RX chaw nres tsheb B siv RF cable.
- Txuas lub TX chaw nres nkoj ntawm chaw nres tsheb B rau RX chaw nres tsheb A siv RF cable.
- Fais fab ntawm lub host systems.
RF cables yuav tsum txhawb kev khiav hauj lwm zaus.
Khiav lub LabVIEW Hwm Code
Xyuas kom LabVIEW Communications System Design Suite 2.0 thiab 802.11 Application Framework 2.1 tau teeb tsa rau hauv koj lub tshuab. Kev teeb tsa yog pib los ntawm kev khiav setup.exe los ntawm qhov muab kev tshaj tawm. Ua raws li tus installer prompts kom tiav cov txheej txheem installation.
Cov kauj ruam uas yuav tsum tau ua kom khiav LabVIEW host code ntawm ob lub chaw nres tsheb tau sau tseg hauv qab no:
- Rau chaw nres tsheb A ntawm thawj tus tswv tsev:
- ib. Launch LabVIEW Communications System Design Suite los ntawm xaiv LabVIEW Kev sib txuas lus 2.0 los ntawm Start menu.
- b. Los ntawm PROJECTS tab, xaiv Daim Ntawv Thov Kev Ua Haujlwm » 802.11 Tsim… txhawm rau tsim qhov project.
- Xaiv 802.11 Tsim USRP RIO v2.1 yog tias koj siv USRP RIO teeb tsa.
- Xaiv 802.11 Tsim FlexRIO v2.1 yog tias koj siv FlexRIO teeb.
- c. Hauv qhov project, tus tswv tsev sab saum toj VI 802.11 Host.gvi tshwm.
- d. Configure RIO identifier nyob rau hauv RIO Device control. Koj tuaj yeem siv NI Measurement & Automation Explorer (MAX) kom tau txais RIO tus cim rau koj lub cuab yeej. USRP RIO ntaus ntawv bandwidth (yog tias 40 MHz, 80 MHz, thiab 160 MHz) tau txheeb xyuas qhov tseeb.
- Rov ua kauj ruam 1 rau chaw nres tsheb B ntawm tus tswv tsev thib ob.
- Teem tus naj npawb ntawm Chaw Nres Nkoj A mus rau 1 thiab qhov chaw nres tsheb B mus rau 2.
- Rau kev teeb tsa FlexRIO, teeb lub moos siv rau PXI_CLK lossis REF IN / ClkIn.
- ib. Rau PXI_CLK: Cov ntaub ntawv siv tau los ntawm PXI chassis.
- b. REF IN / ClkIn: Cov ntaub ntawv siv tau los ntawm ClkIn chaw nres nkoj ntawm NI-5791 adapter module.
- Kho qhov chaw ntawm Ntaus MAC Chaw Nyob thiab Chaw Nyob MAC Chaw Nyob ntawm ob qho chaw.
- ib. Chaw nres tsheb A: Teem lub Ntaus MAC Chaw Nyob thiab Qhov Chaw Nyob MAC rau 46:6F:4B:75:6D:61 thiab 46:6F:4B:75:6D:62 (tus nqi qub).
- b. Chaw nres tsheb B: Teem lub Ntaus MAC Chaw Nyob thiab Chaw Nyob MAC rau 46:6F:4B:75:6D:62 thiab 46:6F:4B:75:6D:61.
- Rau txhua qhov chaw nres tsheb, khiav lub LabVIEW host VI los ntawm nias lub khawm khiav ( ).
- ib. Yog tias ua tiav, Cov Khoom Siv Npaj Npaj Teeb pom kev zoo.
- b. Yog tias koj tau txais qhov yuam kev, sim ib qho ntawm cov hauv qab no:
- Xyuas kom koj lub cuab yeej txuas tau zoo.
- Txheeb xyuas qhov kev teeb tsa ntawm RIO Ntaus.
- Qhib Chaw Nres Nkoj A los ntawm kev teeb tsa Enable Chaw Tswj Xyuas rau On. Qhov chaw nres tsheb Active qhia yuav tsum nyob rau.
- Qhib Chaw Nres Nkoj B los ntawm kev teeb tsa Enable Chaw Tswj Xyuas rau On. Qhov chaw nres tsheb Active qhia yuav tsum nyob rau.
- Xaiv lub MAC tab, thiab txheeb xyuas qhov pom RX Constellation phim qhov kev hloov kho thiab coding txheej txheem teeb tsa siv MCS thiab Subcarrier Format tsis nyob rau lwm qhov chaw nres tsheb. Rau example, tawm ntawm Subcarrier hom ntawv thiab MCS rau lub neej ntawd ntawm Chaw nres tsheb A thiab teeb tsa Subcarrier hom rau 40 MHz (IEEE 802.11 ac) thiab MCS rau 5 ntawm Chaw nres tsheb B. Lub 16-quadrature amplitude modulation (QAM) yog siv rau MCS 4 thiab tshwm sim ntawm tus neeg siv interface ntawm Chaw nres tsheb B. Lub 64 QAM yog siv rau MCS 5 thiab nws tshwm sim ntawm tus neeg siv interface ntawm Chaw nres tsheb A.
- Xaiv lub RF & PHY tab, thiab txheeb xyuas qhov pom RX Lub Hwj Chim spectrum zoo ib yam li xaiv Subcarrier hom ntawm lwm qhov chaw nres tsheb. Chaw nres tsheb A qhia 40 MHz RX lub zog spectrum thaum Chaw Nres Nkoj B qhia 20 MHz RX lub zog spectrum.
Nco tseg: USRP RIO cov khoom siv nrog 40 MHz bandwidth tsis tuaj yeem xa lossis tau txais pob ntawv encoded nrog 80 MHz bandwidth.
802.11 Daim Ntawv Thov Kev Pabcuam cov neeg siv cuam tshuam ntawm Chaw Nres Nkoj A thiab B tau pom nyob rau hauv daim duab 6 thiab daim duab 7, feem. Txhawm rau saib xyuas cov xwm txheej ntawm txhua qhov chaw nres tsheb, 802.11 Application Framework muab ntau yam ntsuas thiab cov duab kos. Txhua daim ntawv thov kev teeb tsa nrog rau cov duab thiab cov cim qhia tau piav qhia hauv cov kab hauv qab no. Cov kev tswj ntawm lub vaj huam sib luag pem hauv ntej tau muab faib ua peb pawg hauv qab no:
- Daim Ntawv Thov Chaw: Cov kev tswj hwm no yuav tsum tau teeb tsa ua ntej qhib qhov chaw nres tsheb.
- Static Runtime Settings: Cov tswj yuav tsum tau hloov mus thiab tom qab ntawd ntawm qhov chaw nres tsheb. Lub Enable Chaw Tswj Xyuas yog siv rau qhov ntawd.
- Dynamic Runtime Settings: Cov kev tswj no tuaj yeem teeb tsa qhov chaw nres tsheb khiav.
Kev piav qhia ntawm Kev Tswj thiab Kev Ntsuas
Basic Controls thiab Indicators
Daim ntawv thov Settings
Kev teeb tsa daim ntawv thov raug siv thaum VI pib thiab hloov tsis tau thaum VI nce thiab khiav. Txhawm rau hloov cov kev teeb tsa no, nres VI, siv cov kev hloov pauv, thiab rov pib dua VI. Lawv tau qhia hauv daim duab 6.
| Parameter | Kev piav qhia |
| RIO Ntaus ntawv | RIO chaw nyob ntawm RF khoom kho vajtse. |
| Kev siv moos | Configures tus siv rau lub moos ntaus ntawv. Qhov siv zaus yuav tsum yog 10 MHz. Koj tuaj yeem xaiv los ntawm cov hauv qab no:
Sab hauv-Siv lub moos siv sab hauv. REF IN / ClkIn-Cov ntaub ntawv siv tau los ntawm REF IN chaw nres nkoj (USRP-294xR, thiab USRP-295XR) lossis ClkIn chaw nres nkoj (NI 5791). GPS-Cov ntaub ntawv siv tau los ntawm GPS module. Tsuas yog siv tau rau USRP- 2950/2952/2953 li. PXI_CLK-Cov ntaub ntawv siv tau los ntawm PXI chassis. Tsuas yog siv tau rau PXIe- 7975/7976 lub hom phiaj nrog NI-5791 adapter modules. |
| Kev ua haujlwm Hom | Nws tau raug teeb tsa ua qhov tsis tu ncua hauv daim duab thaiv. 802.11 Application Framework muab cov qauv hauv qab no:
RF Loopback-Txuas txoj kev TX ntawm ib lub cuab yeej nrog txoj kev RX ntawm tib lub cuab yeej siv RF cabling lossis siv cov kav hlau txais xov. RF Ntau Chaw nres tsheb-Kev xa cov ntaub ntawv tsis tu ncua nrog ob lossis ntau lub chaw nres tsheb ywj pheej khiav ntawm ib tus neeg siv khoom txuas nrog cov kav hlau txais xov lossis los ntawm kev sib txuas nrog cabled. RF Multi Chaw nres tsheb yog hom kev ua haujlwm ua haujlwm. Baseband rov qab- Zoo ib yam li RF loopback, tab sis sab nraud cable loopback yog hloov los ntawm txoj hauv kev digital baseband loopback. |
Static Runtime Settings
Cov chaw khiav haujlwm zoo li qub tuaj yeem hloov pauv thaum lub chaw nres tsheb raug kaw. Cov kev txwv tsis pub siv thaum lub chaw nres tsheb hloov chaw. Lawv tau qhia hauv daim duab 6.
| Parameter | Kev piav qhia |
| Chaw nres tsheb Tus lej | Kev tswj tus lej los teeb tsa tus lej chaw nres tsheb. Txhua qhov chaw khiav haujlwm yuav tsum muaj tus lej sib txawv. Nws tuaj yeem nce mus txog 10. Yog tias tus neeg siv xav nce cov chaw khiav haujlwm, lub cache ntawm MSDU Sequence Number assignment thiab Duplicate Detection yuav tsum tau nce mus rau tus nqi uas yuav tsum tau, txij li tus nqi qub yog 10. |
| Thawj Channel Center Ntau zaus [Hz] | Nws yog thawj channel chaw zaus ntawm lub transmitter hauv Hz. Cov txiaj ntsig siv tau yog nyob ntawm lub cuab yeej uas lub chaw nres tsheb tau khiav. |
| Thawj Channel Xaiv | Kev tswj tus lej los txiav txim seb qhov twg subband yog siv los ua tus thawj channel. PHY npog 80 MHz bandwidth, uas tuaj yeem muab faib ua plaub subbands {0,…,3} ntawm 20 MHz bandwidth rau cov teeb liab uas tsis yog-siab (tsis yog-HT). Rau qhov dav bandwidths subbands tau ua ke. Mus saib ni.com/info thiab nkag mus rau Info Code 80211 AppFWMManual nkag mus rau LabVIEW Kev sib txuas lus 802.11 Daim ntawv thov Lub moj khaum Phau ntawv kom paub ntau ntxiv txog channelization. |
| Hwj chim Qib [dBm] | Cov zis hluav taws xob theem txiav txim siab qhov sib kis ntawm lub nthwv dej nthwv dej (CW) teeb liab uas muaj tag nrho cov digital rau analog converter (DAC) ntau yam. Lub siab ncov-rau-nruab nrab lub zog piv ntawm OFDM txhais tau hais tias cov zis hluav taws xob ntawm kev xa tawm 802.11 ntas feem ntau yog 9 dB txog 12 dB hauv qab lub zog hloov kho. |
| TX RF Chaw nres nkoj | RF chaw nres nkoj siv rau TX (tsuas yog siv rau USRP RIO li). |
| RX RF Chaw nres nkoj | RF chaw nres nkoj siv rau RX (tsuas yog siv rau USRP RIO li). |
| Ntaus ntawv MAC Chaw nyob | MAC chaw nyob cuam tshuam nrog chaw nres tsheb. Qhov taw qhia Boolean qhia yog tias qhov chaw nyob MAC tau siv tau lossis tsis tau. MAC chaw nyob validation yog ua nyob rau hauv lub dynamic hom. |
Dynamic Runtime Settings
Dynamic Runtime Settings tuaj yeem hloov tau txhua lub sijhawm thiab siv tam sim ntawd, txawm tias lub chaw nres tsheb ua haujlwm. Lawv tau qhia hauv daim duab 6.
| Parameter | Kev piav qhia |
| Subcarrier Hom ntawv | Tso cai rau koj hloov ntawm IEEE 802.11 tus qauv qauv. Cov hom kev txhawb nqa yog cov hauv qab no: |
| 802.11a nrog 20 MHz Bandwidth
802.11ac nrog 20 MHz Bandwidth 802.11ac nrog 40 MHz Bandwidth · 802.11ac nrog 80 MHz Bandwidth (txhawb MCS txog 4) |
|
| MCS | Modulation thiab coding scheme index siv los encode cov ntaub ntawv thav ntawv. ACK thav duab yeej ib txwm xa nrog MCS 0. Nco ntsoov tias tsis yog txhua qhov MCS qhov tseem ceeb muaj feem xyuam rau txhua hom subcarrier thiab lub ntsiab lus ntawm MCS hloov nrog hom subcarrier. Cov ntawv teb nyob ib sab ntawm MCS daim teb qhia txog cov qauv kev hloov pauv thiab tus lej coding rau MCS thiab Subcarrier Hom tam sim no. |
| AGC | Yog tias qhib tau, qhov zoo tshaj plaws nce qhov teeb tsa raug xaiv nyob ntawm qhov tau txais lub zog hluav taws xob. Tus nqi nce RX yog muab los ntawm Phau Ntawv RX Gain yog tias AGC tau ua tsis taus. |
| Phau ntawv RX Tau txais [dB] | Phau ntawv RX nce nqi. Siv tau yog tias AGC tsis ua haujlwm. |
| Qhov chaw MAC Chaw nyob | MAC chaw nyob ntawm qhov chaw uas cov pob khoom yuav tsum raug xa mus. Qhov taw qhia Boolean qhia yog tias qhov chaw nyob MAC muab siv tau lossis tsis tau. Yog tias khiav hauv RF loopback hom, lub Qhov chaw MAC Chaw nyob thiab cov Ntaus ntawv MAC Chaw nyob yuav tsum zoo sib xws. |
Qhov taw qhia
Cov lus hauv qab no nthuav qhia cov ntsuas tau tshwm sim ntawm lub vaj huam sib luag pem hauv ntej raws li nws tau qhia hauv daim duab 6.
| Parameter | Kev piav qhia |
| Ntaus ntawv Npaj txhij | Boolean qhov taw qhia qhia yog tias lub cuab yeej npaj txhij. Yog tias koj tau txais qhov yuam kev, sim ib qho ntawm cov hauv qab no:
· Xyuas kom koj lub cuab yeej RIO txuas tau zoo. · Txheeb xyuas qhov kev teeb tsa ntawm RIO Ntaus ntawv. · Txheeb xyuas tus lej chaw nres tsheb. Nws yuav tsum sib txawv yog tias ntau tshaj ib lub chaw nres tsheb khiav ntawm tib tus tswv tsev. |
| Hom phiaj FIFO Tshaj dhau | Boolean qhov taw qhia tias teeb yog tias muaj qhov ntws hla hauv lub hom phiaj rau tus tswv (T2H) thawj-hauv-thawj-tawm-tsim nco buffers (FIFOs). Yog tias ib qho ntawm T2H FIFOs dhau lawm, nws cov ntaub ntawv tsis tuaj yeem ntseeg tau. Cov FIFOs yog raws li nram no:
· T2H RX Data overflow · T2H Constellation overflow · T2H RX Power Spectrum overflow · T2H Channel kwv yees overflow · TX to RF FIFO overflow |
| Chaw nres tsheb Active | Boolean qhov taw qhia qhia yog tias qhov chaw nres tsheb RF ua haujlwm tom qab ua kom lub chaw nres tsheb los ntawm kev teeb tsa Pab Chaw nres tsheb tswj mus On. |
| Siv tau RX Tau txais [dB] | Tus lej ntsuas qhia tau hais tias RX nce tus nqi tam sim no siv. Tus nqi no yog Phau Ntawv RX Tau Txais thaum AGC raug xiam oob qhab, lossis suav RX nce thaum AGC qhib. Nyob rau hauv ob qho tib si, tus nqi nce yog coerced los ntawm lub peev xwm ntawm lub cuab yeej. |
| Siv tau | Boolean ntsuas qhia yog tias muab Ntaus ntawv MAC Chaw nyob thiab Qhov chaw MAC Chaw nyob txuam nrog cov chaw nres tsheb siv tau. |
MAC Tab
Cov lus hauv qab no teev cov kev tswj hwm thiab cov ntsuas uas tau muab tso rau ntawm MAC Tab raws li nws tau qhia hauv daim duab 6.
Dynamic Runtime Settings
| Parameter | Kev piav qhia |
| Cov ntaub ntawv Qhov chaw | Txiav txim siab qhov chaw ntawm MAC thav duab xa los ntawm tus tswv tsev mus rau lub hom phiaj.
Tawm-Txoj kev no yog qhov muaj txiaj ntsig los cuam tshuam kev xa cov ntaub ntawv TX thaum lub TX saw yog nquag ua rau ACK pob ntawv. UDP-Txoj kev no yog qhov muaj txiaj ntsig zoo rau kev qhia demos, xws li thaum siv daim ntawv thov kev tshaj tawm video sab nraud, lossis siv cov cuab yeej ntsuas sab nraud, xws li Iperf. Hauv cov qauv no, cov ntaub ntawv tawm tswv yim tuaj txog los yog tsim los ntawm 802.11 chaw nres tsheb siv cov neeg siv datagram raws tu qauv (UDP). PN Cov ntaub ntawv-Txoj kev no xa cov khoom random thiab muaj txiaj ntsig zoo rau kev sim ua haujlwm. Pob ntawv loj thiab tus nqi tuaj yeem hloov tau yooj yim. |
| Phau ntawv-Txoj kev no muaj txiaj ntsig los ua ib pob ntawv rau kev debugging lub hom phiaj.
Sab nraud-Cia qhov muaj peev xwm sab nraud MAC kev paub lossis lwm yam kev siv sab nraud siv MAC & PHY kev ua haujlwm tau muab los ntawm 802.11 Application Framework. |
|
| Cov ntaub ntawv Qhov chaw Kev xaiv | Txhua lub tab qhia cov kev xaiv rau cov ntaub ntawv sib xws.
UDP Tab-Qhov chaw nres nkoj UDP pub dawb los khaws cov ntaub ntawv rau lub transmitter yog muab tau los ntawm qhov chaw nres tsheb. PN Tab – PN Cov ntaub ntawv Pob ntawv Loj-Packet loj hauv bytes (ntau npaum li cas rau 4061, uas yog ib qho A-MPDU txo los ntawm MAC nyiaj siv ua haujlwm) PN Tab – PN Pob ntawv rau Thib ob-Qhov nruab nrab ntawm cov pob ntawv xa mus rau ib ob (tsuas yog 10,000. Qhov kev ua tiav tuaj yeem yuav tsawg dua nyob ntawm qhov chaw nres tsheb teeb tsa). Phau ntawv Tab – Ua rau TX-Ib Boolean tswj kom ua rau ib pob ntawv TX. |
| Cov ntaub ntawv Lub dab dej | Nws muaj cov kev xaiv hauv qab no:
· Tawm- Cov ntaub ntawv raug muab pov tseg. · UDP-Yog tias qhib tau, cov ntawv tau txais raug xa mus rau UDP chaw nyob thiab chaw nres nkoj (saib hauv qab). |
| Cov ntaub ntawv Lub dab dej Kev xaiv | Nws muaj cov nram qab no yuav tsum tau configuration rau UDP cov ntaub ntawv dab dej xaiv:
· Kev xa tawm IP Chaw nyob-Qhov chaw IP chaw nyob rau UDP tso zis kwj. · Kev xa tawm Chaw nres nkoj-Target UDP chaw nres nkoj rau UDP tso zis kwj, feem ntau ntawm 1,025 thiab 65,535. |
| Rov pib dua TX Kev txheeb cais | Boolean tswj kom rov pib dua tag nrho cov txee ntawm MAC TX Kev txheeb cais pawg. |
| Rov pib dua RX Kev txheeb cais | Boolean tswj kom rov pib dua tag nrho cov txee ntawm MAC RX Kev txheeb cais pawg. |
| tus nqi rau thib ob | Ib qho Boolean tswj los qhia qhov MAC TX Kev txheeb cais thiab MAC RX Kev txheeb cais raws li tus nqi tsim nyog txij li qhov kawg rov pib dua lossis qhov txiaj ntsig ib ob. |
Graphs thiab Indicators
Cov lus hauv qab no nthuav tawm cov ntsuas thiab cov duab qhia ntawm MAC Tab raws li nws tau pom hauv daim duab 6.
| Parameter | Kev piav qhia |
| Cov ntaub ntawv Qhov chaw Kev xaiv – UDP | Txais Chaw nres nkoj-Qhov chaw UDP chaw nres nkoj ntawm UDP input kwj.
FIFO puv- Qhia tias lub qhov (socket) tsis nyob ntawm UDP nyeem ntawv me me los nyeem cov ntaub ntawv muab, yog li cov pob ntawv poob. Ua kom lub qhov (socket) tsis loj. Cov ntaub ntawv Hloov- Qhia tias cov pob ntawv tau nyeem tiav los ntawm qhov chaw nres nkoj muab. Saib rau video streaming kom paub meej ntxiv. |
| Cov ntaub ntawv Lub dab dej Kev xaiv – UDP | FIFO puv- Qhia tias lub qhov (socket) tsis nyob ntawm UDP tus xa khoom me me kom tau txais cov nyiaj them poob haujlwm los ntawm RX Cov Ntaub Ntawv ncaj qha nkag mus (DMA) FIFO, yog li cov pob ntawv poob. Ua kom lub qhov (socket) tsis loj.
Cov ntaub ntawv Hloov- Qhia tias cov pob ntawv tau ua tiav los ntawm DMA FIFO thiab xa mus rau qhov chaw nres nkoj UDP. |
| RX Lub hnub qub | Graphical indication qhia lub hnub qub ntawm RX I/Q samples ntawm cov ntaub ntawv tau txais. |
| RX Tshaj tawm [bits/s] | Cov lej qhia qhia tau hais tias cov ntaub ntawv tus nqi ntawm kev vam meej tau txais thiab txiav txim siab thav duab txuam nrog Ntaus ntawv MAC Chaw nyob. |
| Cov ntaub ntawv Tus nqi [Mbps] | Graphical indication qhia cov ntaub ntawv tus nqi ntawm kev vam meej tau txais thiab decoded thav duab txuam nrog Ntaus ntawv MAC Chaw nyob. |
| MAC TX Kev txheeb cais | Cov lej cim qhia txog qhov tseem ceeb ntawm cov txee hauv qab no ntsig txog MAC TX. Cov txiaj ntsig tau nthuav tawm tuaj yeem yog cov txiaj ntsig tau txais txiaj ntsig txij li qhov kawg rov pib dua lossis qhov txiaj ntsig ib thib ob raws li cov xwm txheej ntawm Boolean tswj tus nqi rau thib ob.
· RTS Triggered · CTS Tiav · Cov ntaub ntawv tshwm sim · ACK TSO |
| MAC RX Kev txheeb cais | Cov lej cim qhia txog qhov tseem ceeb ntawm cov txee hauv qab no ntsig txog MAC RX. Cov txiaj ntsig tau nthuav tawm tuaj yeem yog cov txiaj ntsig tau txais txiaj ntsig txij li qhov kawg rov pib dua lossis qhov txiaj ntsig ib thib ob raws li cov xwm txheej ntawm Boolean tswj tus nqi rau thib ob.
· Preamble kuaj pom (los ntawm synchronization) |
| · PHY cov ntaub ntawv kev pabcuam (PSDUs) tau txais (cov ncej nrog cov txheej txheem kev sib koom ua ke ntawm lub cev (PLCP) header, thav duab yam tsis muaj kev ua txhaum cai)
· MPDU CRC OK (cov ntawv txheeb xyuas kab ke (FCS) daim ntawv hla tebchaws) · RTS kuaj pom · CTS kuaj pom · Cov ntaub ntawv tshawb pom · ACK kuaj pom |
|
| TX yuam kev Tus nqi | Graphical indication qhia txog TX pob ntawv yuam kev tus nqi thiab TX thaiv tus nqi yuam kev. TX packet yuam kev tus nqi yog xam raws li qhov piv ntawm kev vam meej MPDU kis mus rau tus naj npawb ntawm kis tau tus mob. TX thaiv tus nqi yuam kev yog xam raws li qhov sib piv ntawm kev vam meej MPDU kis mus rau tag nrho cov kev sib kis. Cov txiaj ntsig tsis ntev los no tau tshwm sim nyob rau sab xis ntawm daim duab. |
| Nruab nrab Kev xa rov qab rau Pob ntawv | Graphical indications qhia qhov nruab nrab ntawm cov kis tau tus mob sim. Tus nqi tsis ntev los no tau tshwm sim nyob rau sab xis ntawm daim duab. |
RF & PHY Tab
Cov lus hauv qab no teev cov kev tswj hwm thiab cov cim qhia uas tau muab tso rau ntawm RF & PHY Tab raws li nws tau pom hauv daim duab 8.
Dynamic Runtime Settings
| Parameter | Kev piav qhia |
| CCA Zog Kev kuaj pom Qhov pib [dBm] | Yog tias lub zog ntawm cov teeb liab tau txais siab tshaj qhov pib, qhov chaw nres tsheb tsim nyog rau qhov nruab nrab uas tsis khoom thiab cuam tshuam nws cov txheej txheem Backoff, yog tias muaj. Teeb lub CCA Zog Kev kuaj pom Qhov pib [dBm] tswj rau tus nqi uas siab dua qhov tsawg kawg nkaus tus nqi ntawm qhov nkhaus tam sim no hauv RF Input Power graph. |
Graphs thiab Indicators
| Parameter | Kev piav qhia |
| quab yuam LO Ntau zaus TX [Hz] | Qhov tseeb siv TX zaus ntawm lub hom phiaj. |
| RF Ntau zaus [Hz] | Lub chaw RF zaus tom qab hloov kho raws li qhov Thawj Channel Xaiv tswj thiab ua haujlwm bandwidth. |
| quab yuam LO Ntau zaus RX [Hz] | Qhov tseeb siv RX zaus ntawm lub hom phiaj. |
| quab yuam Hwj chim Qib [dBm] | Lub hwj chim theem ntawm ib tug nruam nthwv dej ntawm 0 dBFS uas muab rau cov cuab yeej tam sim no. Qhov nruab nrab tso zis hwj chim ntawm 802.11 cov teeb liab yog kwv yees li 10 dB hauv qab no. Qhia txog qib fais fab tiag tiag uas xav txog RF zaus thiab cov cuab yeej tshwj xeeb calibration qhov tseem ceeb los ntawm EEPROM. |
| Nyiaj them CFO [Hz] | Carrier zaus offset kuaj pom los ntawm coarse zaus kwv yees chav tsev. Rau FlexRIO / FlexRIO adapter module, teem lub moos siv rau PXI_CLK lossis REF IN / ClkIn. |
| Channelization | Graphical indications qhia tau hais tias sub-band yog siv los ua tus thawj channel raws li cov Thawj Channel Xaiv. PHY npog 80 MHz bandwidth, uas tuaj yeem muab faib ua plaub pawg sub-bands {0,…,3} ntawm 20 MHz bandwidth rau cov teeb liab uas tsis yog HT. Rau qhov dav bandwidths (40 MHz lossis 80 MHz), cov sub-bands tau ua ke. Mus saib ni.com/info thiab nkag mus rau Info Code 80211 AppFWMManual nkag mus rau LabVIEW Kev sib txuas lus
802.11 Daim ntawv thov Lub moj khaum Phau ntawv kom paub ntau ntxiv txog channelization. |
| Channel Kev kwv yees | Graphical indication qhia cov amplitude thiab theem ntawm kwv yees channel (raws li L-LTF thiab VHT-LTF). |
| Baseband RX Hwj chim | Graphical indications qhia lub teeb liab baseband lub zog ntawm pob ntawv pib. Qhov ntsuas tus lej qhia qhov tseeb ntawm tus neeg txais lub zog hauv lub zog. Thaum lub AGC enabled, lub
802.11 Application Framework sim ua kom tus nqi no ntawm qhov muab AGC phiaj teeb liab zog in Advanced tab los ntawm kev hloov RX nce raws li. |
| TX Hwj chim Spectrum | Ib qho snapshot ntawm tam sim no baseband spectrum los ntawm TX. |
| RX Hwj chim Spectrum | Ib qho snapshot ntawm tam sim no baseband spectrum los ntawm RX. |
| RF Tswv yim Hwj chim | Qhia txog RF input fais fab tam sim no hauv dBm tsis hais seb hom teeb liab tuaj yog qhov twg 802.11 tau kuaj pom. Qhov ntsuas no qhia txog lub zog RF input, hauv dBm, tam sim no raug ntsuas, nrog rau thaum pib pob ntawv tshiab tshaj plaws. |
Advanced Tab
Cov lus hauv qab no teev cov kev tswj hwm uas tau muab tso rau ntawm Advanced Tab raws li nws tau qhia hauv daim duab 9.
Static Runtime Settings
| Parameter | Kev piav qhia |
| tswj ncej TX vector kev teeb tsa | Siv cov nqi MCS teeb tsa hauv TX vectors rau RTS, CTS lossis ACK thav duab. Lub neej ntawd tswj thav duab configuration ntawm cov thav duab yog Non-HT-OFDM thiab 20 MHz bandwidth thaum MCS tuaj yeem teeb tsa los ntawm tus tswv tsev. |
| dot11RTSTThreshold | Semi-static parameter siv los ntawm kev xaiv thav duab los txiav txim siab seb RTS | CTS puas tso cai lossis tsis tau.
· Yog tias PSDU ntev, uas yog, PN Cov ntaub ntawv Pob ntawv Loj, yog loj dua dot11RTSTthreshold, lub {RTS | CTS | DATA | ACK} ncej yog siv. · Yog tias PSDU ntev, uas yog, PN Cov ntaub ntawv Pob ntawv Loj, yog tsawg dua lossis sib npaug rau dot11RTSTthreshold, {DATA | ACK} ncej yog siv. Cov txheej txheem no tso cai rau cov chaw nres tsheb tau teeb tsa los pib RTS / CTS ib txwm, tsis tau, lossis tsuas yog ntawm cov thav ntawv ntev dua li qhov ntev. |
| dot11ShortRetryLimit | Semi-static parameter-Ntau kawg ntawm kev rov ua dua thov rau luv luv MPDU hom (sequences tsis RTS|CTS). Yog hais tias tus naj npawb ntawm cov kev txwv rov qab mus txog, muab MPDUs thiab cuam tshuam MPDU teeb tsa thiab TX vector. |
| dot11LongRetryLimit | Semi-static parameter-Ntau kawg ntawm kev rov ua dua tau thov rau hom MPDU ntev (ib ntu suav nrog RTS | CTS). Yog hais tias tus naj npawb ntawm cov kev txwv rov qab mus txog, muab MPDUs thiab cuam tshuam MPDU teeb tsa thiab TX vector. |
| RF Loopback Demo Hom | Boolean tswj kom hloov pauv ntawm cov haujlwm ua haujlwm:
RF Multi-chaw nres tsheb (Boolean yog cuav): Tsawg kawg yog ob lub chaw nres tsheb yuav tsum tau teeb tsa, qhov twg txhua qhov chaw nres tsheb ua ib qho khoom siv 802.11. RF Loopback (Boolean yog qhov tseeb): Ib qho khoom siv yuav tsum tau ua. Qhov kev teeb tsa no muaj txiaj ntsig zoo rau me me demos siv ib qho chaw nres tsheb. Txawm li cas los xij, kev siv MAC nta muaj qee qhov kev txwv hauv RF Loopback hom. Cov pob ntawv ACK ploj thaum MAC TX tseem tos lawv; DCF lub xeev tshuab ntawm FPGA ntawm MAC tiv thaiv hom no. Yog li ntawd, MAC TX ib txwm qhia txog kev sib kis tsis tau. Li no, qhov tshaj tawm TX pob ntawv yuam kev tus nqi thiab TX thaiv qhov yuam kev tus nqi ntawm cov graphical qhia ntawm TX Error Rates yog ib qho. |
Dynamic Runtime Settings
| Parameter | Kev piav qhia |
| Rov qab | Backoff tus nqi uas yog siv ua ntej ib tug ncej kis tau tus mob. Lub backoff yog suav nrog cov lej ntawm 9 µs ntev. Raws li tus nqi rov qab, qhov kev suav rov qab rau cov txheej txheem Backoff tuaj yeem kho lossis random:
· Yog tias tus nqi rov qab loj dua lossis sib npaug ntawm xoom, siv qhov rov qab ruaj khov. · Yog hais tias tus nqi backoff yog qhov tsis zoo, ib qho random backoff suav yog siv. |
| AGC phiaj teeb liab zog | Target RX fais fab hauv digital baseband siv yog tias AGC qhib. Qhov txiaj ntsig zoo nyob ntawm qhov siab tshaj-rau- nruab nrab lub zog piv (PAPR) ntawm cov teeb liab tau txais. Teeb lub AGC phiaj teeb liab zog rau tus nqi loj tshaj qhov uas tau nthuav tawm hauv Baseband RX Hwj chim daim duab. |
Txheej xwm Tab
Cov lus hauv qab no teev cov kev tswj hwm thiab cov cim qhia uas tau muab tso rau ntawm Pawg Txheej Txheem raws li nws tau qhia hauv daim duab 10.
Dynamic Runtime Settings
| Parameter | Kev piav qhia |
| FPGA xwm txheej rau taug qab | Nws muaj cov txheej txheem ntawm Boolean tswj; txhua qhov kev tswj tau siv los pab lossis cuam tshuam kev taug qab ntawm cov xwm txheej FPGA sib raug. Cov xwm txheej no yog raws li nram no:
· PHY TX pib thov · PHY TX kawg qhia · PHY RX pib qhia · PHY RX kawg qhia · PHY CCA sij hawm qhia · PHY RX nce hloov qhia · DCF xeev qhia · MAC MPDU RX qhia · MAC MPDU TX thov |
| Tag nrho | Boolean tswj kom pab tau cov xwm txheej taug qab ntawm cov txheej xwm FPGA saum toj no. |
| Tsis muaj | Boolean tswj kom lov tes taw cov xwm txheej taug qab ntawm cov txheej xwm FPGA saum toj no. |
| log file ua ntej | Lub npe ntawv file sau cov ntaub ntawv txheej xwm FPGA uas tau nyeem los ntawm Event DMA FIFO. Lawv tau nthuav tawm saum toj no hauv lub FPGA xwm txheej rau taug qab. Txhua qhov kev tshwm sim muaj ib lub sij hawm stamp thiab cov ntaub ntawv tshwm sim. Cov ntawv nyeem file yog tsim hauv zos hauv qhov project folder.
Tsuas yog cov txheej xwm xaiv hauv FPGA xwm txheej rau taug qab saum toj no yuav muab sau rau hauv cov ntawv nyeem file. |
| Sau rau file | Boolean tswj kom pab lossis lov tes taw cov txheej txheem sau ntawv ntawm cov txheej xwm FPGA xaiv rau cov ntawv nyeem file. |
| Ntshiab Cov xwm txheej | Boolean tswj kom tshem tawm cov xwm txheej keeb kwm ntawm lub vaj huam sib luag pem hauv ntej. Lub neej ntawd sau npe loj ntawm qhov kev tshwm sim keeb kwm yog 10,000. |
Status Tab
Cov lus hauv qab no teev cov cim qhia uas tau muab tso rau ntawm Status Tab raws li nws tau pom hauv daim duab 11. 
Graphs thiab Indicators
| Parameter | Kev piav qhia |
| TX | Tshaj tawm ntau qhov ntsuas uas qhia cov xov tooj xa mus ntawm cov txheej txheem sib txawv, pib los ntawm cov ntaub ntawv mus rau PHY. Tsis tas li ntawd, nws qhia txog UDP cov chaw nres nkoj sib raug. |
| Cov ntaub ntawv qhov chaw | num pob ntawv qhov chaw: Tus lej ntsuas qhia tau hais tias muaj pes tsawg pob ntawv tau txais los ntawm cov ntaub ntawv (UDP, PN Data, lossis Phau Ntawv Qhia).
hloov qhov chaw: Boolean qhov taw qhia qhia tau hais tias cov ntaub ntawv tau txais los ntawm cov ntaub ntawv qhov chaw (tus naj npawb ntawm cov pob ntawv tau txais tsis yog xoom). |
| Siab MAC | TX Thov Siab MAC: Cov lej ntsuas qhia tus naj npawb ntawm MAC TX Configuration thiab Payload thov cov lus tsim los ntawm MAC siab abstraction txheej thiab sau rau ntawm qhov sib txuas UDP chaw nres nkoj uas nyob hauv qab lawv. |
| Nruab nrab MAC | TX Thov Nruab nrab MAC: Cov lej ntsuas qhia tus naj npawb ntawm MAC TX Configuration thiab Payload thov cov lus tau txais los ntawm MAC siab abstraction txheej thiab nyeem los ntawm qhov sib thooj UDP chaw nres nkoj uas nyob saum lawv. Ua ntej xa ob cov lus mus rau cov khaubncaws sab nraud povtseg, cov kev teeb tsa tau raug kuaj xyuas yog tias lawv tau txais kev txhawb nqa lossis tsis tau, ntxiv rau, MAC TX Configuration thov thiab MAC TX Payload thov raug kuaj xyuas yog tias lawv sib xws.
TX Thov rau PHY: Tus lej ntsuas qhia tus naj npawb ntawm MAC MSDU TX thov sau rau DMA FIFO. TX Kev lees paub Nruab nrab MAC: Cov lej ntsuas qhia tus lej ntawm cov lus pom zoo uas tau tsim los ntawm MAC nruab nrab rau MAC TX Configuration thiab MAC TX Payload cov lus thiab sau rau hauv qhov chaw nres nkoj UDP uas nyob saum lawv. TX Cov lus qhia los ntawm PHY: Tus lej ntsuas qhia tus naj npawb ntawm MAC MSDU TX qhov kawg qhia nyeem los ntawm DMA FIFO. TX Cov lus qhia Nruab nrab MAC: Tus lej ntsuas qhia tus naj npawb ntawm MAC TX Status Indications qhia los ntawm MAC Nruab Nrab rau MAC siab siv qhov chaw nres nkoj UDP uas tau muab tso rau saum nws. |
| PHY | TX Cov lus qhia Hla: Tus lej ntsuas qhia tau hais tias muaj pes tsawg tus overflows uas tshwm sim thaum lub sij hawm FIFO sau los ntawm TX End indications. |
| RX | Tshaj tawm ntau qhov ntsuas uas qhia cov xov tooj ntawm cov txheej txheem sib txawv, pib ntawm PHY mus rau cov ntaub ntawv dab dej. Tsis tas li ntawd, nws qhia txog UDP cov chaw nres nkoj sib raug. |
| PHY | RX Qhov taw qhia Hla: Tus lej ntsuas qhia tau hais tias muaj pes tsawg tus overflows uas tshwm sim thaum lub sij hawm FIFO sau los ntawm MAC MSDU RX indications. |
| Nruab nrab MAC | RX Cov lus qhia los ntawm PHY: Tus lej ntsuas qhia tus naj npawb ntawm MAC MSDU RX cov lus qhia nyeem los ntawm DMA FIFO.
RX Cov lus qhia Nruab nrab MAC: Tus lej ntsuas qhia tus naj npawb ntawm MAC MSDU RX cov lus qhia uas tau txiav txim siab raug thiab qhia rau MAC siab siv qhov chaw nres nkoj UDP uas tau muab tso rau saum toj no. |
| Siab MAC | RX Cov lus qhia Siab MAC: Qhov taw qhia tus lej qhia tus naj npawb ntawm MAC MSDU RX cov lus qhia nrog MSDU cov ntaub ntawv tau txais ntawm MAC siab. |
| Cov ntaub ntawv dab dej | num pob ntawv dab dej: Tus naj npawb ntawm cov pob ntawv tau txais ntawm cov ntaub ntawv dab dej los ntawm MAC siab.
hloov dab dej: Qhov taw qhia Boolean qhia tau hais tias cov ntaub ntawv tau txais los ntawm MAC siab. |
Ntxiv Cov Kev Ua Haujlwm Ntxiv thiab Kev Xaiv Cov Kev Xaiv
Tshooj lus no piav qhia txog cov kev xaiv configuration ntxiv thiab hom kev ua haujlwm. Ntxiv rau RF Multi-Station hom tau piav qhia nyob rau hauv Khiav Qhov Sample Project section, 802.11 Application Framework txhawb nqa RF Loopback thiab Baseband kev ua haujlwm hom siv ib lub cuab yeej. Cov kauj ruam tseem ceeb los khiav 802.11 Application Framework siv ob hom no tau piav qhia hauv qab no.
RF Loopback Hom: Cabled
Nyob ntawm kev teeb tsa, ua raws li cov kauj ruam hauv qhov "Configuring USRP RIO Setup" lossis "Configuring FlexRIO/FlexRIO Adapter Module Setup" section.
Configuring USRP RIO Teeb
- Xyuas kom meej tias USRP RIO ntaus ntawv txuas nrog rau tus tswv system khiav LabVIEW Communications System Design Suite.
- Tsim cov RF loopback configuration siv ib tug RF cable thiab ib tug attenuator.
- ib. Txuas lub cable rau RF0/TX1.
- b. Txuas lub 30 dB attenuator mus rau lwm qhov kawg ntawm lub cable.
- c. Txuas lub attenuator rau RF1/RX2.
- Fais fab ntawm USRP ntaus ntawv.
- Fais fab ntawm lub host system.
Configuring FlexRIO Adapter Module Teeb
- Xyuas kom tseeb tias cov khoom siv FlexRIO raug teeb tsa kom zoo hauv qhov system khiav LabVIEW Communications System Design Suite.
- Tsim ib qho RF loopback configuration txuas TX ntawm NI-5791 module nrog RX ntawm NI-5791 module.
Khiav lub LabVIEW Hwm Code
Cov lus qhia txog kev khiav LabVIEW host code twb tau muab rau hauv "Running This Sample Project" seem rau RF Multi-Station ua haujlwm hom. Ntxiv nrog rau cov lus qhia ntawm Kauj Ruam 1 hauv ntu ntawd, kuj ua tiav cov kauj ruam hauv qab no:
- Lub neej ua haujlwm hom yog RF Multi-Station. Hloov mus rau Advanced tab thiab pab kom RF Loopback Demo hom tswj. Qhov no yuav siv cov kev hloov hauv qab no:
- Hom kev ua haujlwm yuav raug hloov mus rau RF Loopback hom
- Lub Ntaus MAC Chaw Nyob thiab Chaw Nyob MAC Chaw Nyob yuav tau txais tib qhov chaw nyob. Rau example, ob leeg yuav yog 46:6F:4B:75:6D:61.
- Khiav lub LabVIEW host VI los ntawm nias lub khawm khiav ( ).
- ib. Yog tias ua tiav, Cov Khoom Siv Npaj Npaj Teeb pom kev zoo.
- b. Yog tias koj tau txais qhov yuam kev, sim ib qho ntawm cov hauv qab no:
- Xyuas kom koj lub cuab yeej txuas tau zoo.
- Txheeb xyuas qhov kev teeb tsa ntawm RIO Ntaus.
- Ua kom lub chaw nres tsheb los ntawm kev teeb tsa Enable Station control to On. Qhov chaw nres tsheb Active qhia yuav tsum nyob rau.
- Txhawm rau nce RX Throughput, hloov mus rau Advanced tab thiab teeb tsa tus nqi rov qab ntawm cov txheej txheem Backoff rau xoom, vim tsuas yog ib qho chaw nres tsheb khiav. Tsis tas li ntawd, teeb tsa qhov siab tshaj plaws ntawm kev rov ua dua ntawm dot11ShortRetryLimit rau 1. Disable thiab tom qab ntawd ua kom lub chaw nres tsheb siv Enable Chaw Tswj Xyuas, txij li qhov dot11ShortRetryLimit yog qhov tsis zoo li qub.
- Xaiv lub MAC tab, thiab txheeb xyuas qhov pom RX Constellation phim qhov kev hloov kho thiab coding txheej txheem teeb tsa siv MCS thiab Subcarrier Format tsis. Rau example, 16 QAM yog siv rau MCS 4 thiab 20 MHz 802.11a. Nrog rau lub neej ntawd nqis koj yuav tsum pom ib tug throughput ntawm txog 8.2 Mbits / s.
RF Loopback Hom: Hla-the-Air Transmission
Kev sib kis ntawm huab cua zoo ib yam li kev teeb tsa cabled. Cables yog hloov los ntawm kav hlau txais xov haum rau cov xaiv channel chaw zaus thiab system bandwidth.
Ceev faj Nyeem cov ntaub ntawv cov khoom lag luam rau tag nrho cov khoom siv kho vajtse, tshwj xeeb tshaj yog cov khoom siv NI RF, ua ntej siv lub kaw lus.
USRP RIO thiab FlexRIO cov khoom siv tsis raug pom zoo lossis muaj ntawv tso cai rau kev sib kis saum huab cua uas siv lub kav hlau txais xov. Yog li ntawd, kev khiav hauj lwm cov khoom siv nrog lub kav hlau txais xov yuav ua txhaum txoj cai hauv zos. Xyuas kom tseeb tias koj tau ua raws li tag nrho cov cai hauv zos ua ntej ua haujlwm cov khoom no nrog lub kav hlau txais xov.
Baseband Loopback Hom
Lub baseband loopback zoo ib yam li RF loopback. Hauv hom no, RF yog bypassed. TX samples raug xa ncaj qha mus rau RX ua cov saw ntawm FPGA. Tsis xav tau kev txuas ntawm cov cuab yeej txuas. Txhawm rau khiav qhov chaw nres tsheb hauv Baseband Loopback, teeb tsa manually hom kev ua haujlwm nyob rau hauv daim duab thaiv raws li qhov tas mus li rau Baseband Loopback.
Ntxiv Configuration Options
PN Data Generator
Koj tuaj yeem siv lub tshuab hluav taws xob tsim hluav taws xob pseudo-noise (PN) cov ntaub ntawv los tsim TX cov ntaub ntawv tsheb, uas yog qhov tseem ceeb rau kev ntsuas qhov kev ua tau zoo ntawm lub cev. Lub tshuab hluav taws xob PN cov ntaub ntawv tau teeb tsa los ntawm PN Data Packet Size thiab PN Packets ib qhov thib ob. Cov ntaub ntawv tus nqi ntawm qhov tso zis ntawm PN Data Generator yog sib npaug rau cov khoom ntawm ob qho kev txwv. Daim ntawv ceeb toom tias qhov tseeb system throughput pom ntawm RX sab nyob ntawm qhov kis tsis tau, suav nrog Subcarrier hom thiab MCS tus nqi, thiab tuaj yeem qis dua tus nqi tsim los ntawm PN data generator.
Cov kauj ruam hauv qab no muab tus example ntawm yuav ua li cas PN cov ntaub ntawv tshuab hluav taws xob tuaj yeem qhia qhov cuam tshuam ntawm kev sib kis raws tu qauv ntawm kev ua tiav tau. Daim ntawv ceeb toom tias qhov muab cov txiaj ntsig tau tuaj yeem sib txawv me ntsis nyob ntawm qhov tseeb siv kho vajtse platform thiab channel.
- Teeb tsa, teeb tsa, thiab khiav ob lub chaw nres tsheb (chaw nres tsheb A thiab chaw nres tsheb B) xws li hauv "Khiav Qhov Sample Project” section.
- Kho cov chaw kom raug rau Ntaus MAC Chaw Nyob thiab Qhov Chaw Nyob MAC Chaw Nyob xws li qhov chaw nyob ntawm chaw nres tsheb A yog qhov chaw nres tsheb B thiab rov ua dua raws li tau piav qhia yav dhau los.
- Ntawm Chaw Nres Nkoj B, teeb cov ntaub ntawv Source rau phau ntawv los lov tes taw TX cov ntaub ntawv los ntawm Chaw nres tsheb B.
- Qhib ob lub chaw nres tsheb.
- Nrog rau qhov kev teeb tsa ua ntej, koj yuav tsum pom qhov nce ntawm 8.2 Mbits / s ntawm Chaw nres tsheb B.
- Hloov mus rau MAC tab ntawm Chaw Nres Nkoj A.
- Teem lub PN Data Packet Loj rau 4061.
- Teem tus naj npawb ntawm PN Packets ib Thib Ob rau 10,000. Qhov teeb tsa no saturates TX tsis rau txhua qhov kev teeb tsa tau.
- Hloov mus rau Advanced tab ntawm Chaw nres tsheb A.
- Teem lub dot11RTSTThreshold rau tus nqi loj dua PN Data Packet Size (5,000) kom lov tes taw RTS / CTS txheej txheem.
- Teem tus lej siab tshaj plaws ntawm kev rov ua dua uas sawv cev los ntawm dot11ShortRetryLimit rau 1 txhawm rau lov tes taw retransmissions.
- Disable thiab tom qab ntawd qhib chaw nres tsheb A txij li lub dot11RTSTThreshold yog qhov tsis zoo li qub.
- Sim sib txawv ua ke ntawm Subcarrier Format thiab MCS ntawm Chaw Nres Tsheb A. Saib xyuas cov kev hloov hauv RX constellation thiab RX throughput ntawm Chaw nres tsheb B.
- Teem Subcarrier Hom rau 40 MHz (IEEE 802.11ac) thiab MCS rau 7 ntawm Chaw nres tsheb A. Saib xyuas tias qhov kev xa tawm ntawm Chaw Nres Nkoj B yog li 72 Mbits / s.
Kev Tshaj Tawm Video
Kev xa cov yeeb yaj kiab qhia txog qhov muaj peev xwm ntawm 802.11 Daim Ntawv Thov Kev Ua Haujlwm. Txhawm rau ua qhov kev xa tawm video nrog ob lub cuab yeej, teeb tsa kev teeb tsa raws li tau piav qhia hauv ntu dhau los. 802.11 Application Framework muab UDP interface, uas yog qhov zoo rau kev tshaj tawm video. Lub transmitter thiab receiver xav tau ib daim ntawv thov kwj video (example, VLC, uas tuaj yeem rub tawm los ntawm http://videolan.org ). Txhua qhov kev pab cuam muaj peev xwm xa cov ntaub ntawv UDP tuaj yeem siv los ua cov ntaub ntawv. Ib yam li ntawd, txhua qhov kev pab cuam muaj peev xwm tau txais cov ntaub ntawv UDP tuaj yeem siv los ua cov ntaub ntawv dab dej.
Configure tus txais
Tus tswv tsev ua tus txais kev siv 802.11 Daim Ntawv Thov Kev Ua Haujlwm kom dhau tau txais 802.11 cov ntaub ntawv thav ntawv thiab dhau lawv los ntawm UDP mus rau cov neeg ua yeeb yaj kiab video.
- Tsim ib qhov project tshiab raws li tau piav qhia hauv "Running the LabVIEW Lub Tswv Cuab Code" thiab teeb tsa tus cim RIO kom raug nyob rau hauv RIO ntaus ntawv parameter.
- Teem Lub Chaw Nres Nkoj rau 1.
- Cia hom kev ua haujlwm nyob rau hauv daim duab thaiv kom muaj tus nqi pib, RF Multi Station, raws li tau piav qhia yav dhau los.
- Cia Lub Ntaus MAC Chaw Nyob thiab Chaw Nyob MAC Chaw Nyob kom muaj qhov tseem ceeb.
- Hloov mus rau MAC tab thiab teeb Cov Ntaub Ntawv Sink rau UDP.
- Qhib chaw nres tsheb.
- Pib cmd.exe thiab hloov mus rau VLC installation directory.
- Pib daim ntawv thov VLC raws li tus neeg siv streaming nrog cov lus txib hauv qab no: vlc udp: // @: 13000, qhov twg tus nqi 13000 yog sib npaug rau Transmit chaw nres nkoj ntawm Data Sink Option.
Configure lub Transmitter
Tus tswv tsev ua tus xa xov tau txais UDP pob ntawv los ntawm cov video streaming server thiab siv 802.11 Application Framework los xa lawv li 802.11 cov ntaub ntawv thav ntawv.
- Tsim ib qhov project tshiab raws li tau piav qhia hauv "Running the LabVIEW Lub Tswv Cuab Code" thiab teeb tsa tus cim RIO kom raug nyob rau hauv RIO ntaus ntawv parameter.
- Teem Lub Chaw Nres Nkoj rau 2.
- Cia hom kev ua haujlwm nyob rau hauv daim duab thaiv kom muaj tus nqi pib, RF Multi Station, raws li tau piav qhia yav dhau los.
- Teem lub Ntaus MAC Chaw Nyob kom zoo ib yam li qhov chaw MAC Chaw Nyob ntawm Chaw Nres Tsheb 1 (tus nqi qub:
46:6F:4B:75:6D:62) - Teem lub Destination MAC Chaw Nyob kom zoo ib yam li Ntaus MAC Chaw Nyob ntawm Chaw Nres Tsheb 1 (tus nqi qub:
46:6F:4B:75:6D:61) - Hloov mus rau MAC tab thiab teeb cov ntaub ntawv Source rau UDP.
- Qhib chaw nres tsheb.
- Pib cmd.exe thiab hloov mus rau VLC installation directory.
- Txheeb xyuas txoj hauv kev mus rau ib qho video file uas yuav tsum tau siv rau streaming.
- Pib lub VLC daim ntawv thov ua streaming server nrog cov lus txib hauv qab no vlc “PATH_TO_VIDEO_FILE”
:sout=#std{access=udp{ttl=1},mux=ts,dst=127.0.0.1: UDP_Port_Value}, qhov twg PATH_TO_VIDEO_FILE yuav tsum tau hloov nrog qhov chaw ntawm cov yees duab uas yuav tsum tau siv, thiab parameter UDP_Port_Value yog sib npaug rau 12000 + Chaw nres tsheb Number, uas yog, 12002.
Tus tswv tsev ua tus txais yuav tso saib cov vis dis aus streamed los ntawm lub transmitter.
Kev daws teeb meem
Tshooj lus no muab cov ntaub ntawv hais txog kev txheeb xyuas lub hauv paus ntawm qhov teeb meem yog tias lub kaw lus tsis ua haujlwm raws li qhov xav tau. Nws tau piav qhia txog kev teeb tsa ntau lub chaw nres tsheb uas chaw nres tsheb A thiab chaw nres tsheb B kis tau.
Cov lus hauv qab no muab cov ntaub ntawv hais txog yuav ua li cas txheeb xyuas cov haujlwm ib txwm ua thiab yuav ua li cas txhawm rau txheeb xyuas qhov tsis raug.
| Ib txwm Kev ua haujlwm | |
| Ib txwm Kev ua haujlwm Kuaj | · Teem Chaw Nres Nkoj rau cov nqi sib txawv.
· Kho kom raug cov chaw ntawm Ntaus ntawv MAC Chaw nyob thiab Qhov chaw MAC Chaw nyob raws li tau piav dhau los. · Cia lwm qhov chaw rau qhov tseem ceeb. |
| Kev soj ntsuam: | |
| · RX Kev Tshaj Tawm hauv thaj tsam ntawm 7.5 Mbit / s ntawm ob qhov chaw nres tsheb. Nws nyob ntawm seb nws yog wireless channel lossis cabled channel.
· Nws MAC tab: o MAC TX Kev txheeb cais: Cov Cov ntaub ntawv ua rau thiab ACK Lub cev tsis muaj zog cov ntsuas tau nce nrawm. o MAC RX Kev txheeb cais: Txhua qhov ntsuas tau nce nrawm dua li qhov RTS kuaj pom thiab CTS kuaj pom, los ntawm dot11RTSthreshold on Advanced tab loj dua PN Cov ntaub ntawv Pob ntawv Loj (PSDU ntev) rau MAC tab. o Lub constellation nyob rau hauv lub RX Lub hnub qub graph phim qhov kev txiav txim ntawm cov qauv MCS xaiv ntawm lub transmitter. o Cov TX Thaiv yuam kev Tus nqi daim duab qhia tau hais tias tus nqi txais. · Nws RF & PHY tab: |
|
| o Cov RX Hwj chim Spectrum yog nyob rau hauv txoj cai subband raws li xaiv Thawj Channel Xaiv. Txij li tus nqi qub yog 1, nws yuav tsum nyob nruab nrab ntawm -20 MHz thiab 0 hauv qhov RX Hwj chim Spectrum daim duab.
o Cov CCA Zog Kev kuaj pom Qhov pib [dBm] loj dua lub hwj chim tam sim no hauv lub RF Tswv yim Hwj chim daim duab. o Qhov ntsuas ntsuas lub zog ntawm pob ntawv pib (liab dots) hauv Baseband RX Hwj chim graph yuav tsum tsawg tshaj li qhov AGC phiaj teeb liab zog on Advanced tab. |
|
| MAC Kev txheeb cais Kuaj | · Disable chaw nres tsheb A thiab chaw nres tsheb B
· Ntawm Chaw nres tsheb A, MAC tab, set Cov ntaub ntawv Qhov chaw rau Phau ntawv. · Qhib chaw nres tsheb A thiab chaw nres tsheb B o Chaw nres tsheb A, MAC tab: § Cov ntaub ntawv ua rau of MAC TX Kev txheeb cais yog zero. § ACK ua rau of MAC RX Kev txheeb cais yog zero. o Chaw nres tsheb B, MAC tab: § RX Tshaj tawm yog zero. § ACK ua rau of MAC TX Kev txheeb cais yog zero. § Cov ntaub ntawv kuaj pom of MAC RX Kev txheeb cais yog zero. · Ntawm Chaw nres tsheb A, MAC tab, nyem ib zaug rau Ua rau TX of Phau ntawv Cov ntaub ntawv Qhov chaw o Chaw nres tsheb A, MAC tab: § Cov ntaub ntawv ua rau of MAC TX Kev txheeb cais yog 1. § ACK ua rau of MAC RX Kev txheeb cais yog 1. o Chaw nres tsheb B, MAC tab: § RX Tshaj tawm yog zero. § ACK ua rau of MAC TX Kev txheeb cais yog 1. § Cov ntaub ntawv kuaj pom of MAC RX Kev txheeb cais yog 1. |
| RTS / CTS cov txee Kuaj | · Disable Station A, teeb lub dot11RTSTThreshold mus rau xoom, vim nws yog ib tug static parameter. Tom qab ntawd, qhib chaw nres tsheb A.
· Ntawm Chaw nres tsheb A, MAC tab, nyem ib zaug rau Ua rau TX of Phau ntawv Cov ntaub ntawv Qhov chaw o Chaw nres tsheb A, MAC tab: § RTS ua rau of MAC TX Kev txheeb cais yog 1. § CTS ua rau of MAC RX Kev txheeb cais yog 1. o Chaw nres tsheb B, MAC tab: § CTS ua rau of MAC TX Kev txheeb cais yog 1. § RTS ua rau of MAC RX Kev txheeb cais yog 1. |
| Tsis yog Kev teeb tsa | |
| Qhov system Kev teeb tsa | · Teem Chaw Nres Nkoj rau cov nqi sib txawv.
· Kho kom raug cov chaw ntawm Ntaus ntawv MAC Chaw nyob thiab Qhov chaw MAC Chaw nyob raws li tau piav dhau los. · Cia lwm qhov chaw rau qhov tseem ceeb. |
| yuam kev:
Tsis muaj cov ntaub ntawv muab rau kis tau tus mob |
Kev taw qhia:
Cov counter values ntawm Cov ntaub ntawv ua rau thiab ACK ua rau in MAC TX Kev txheeb cais tsis nce. Kev daws: Teeb Cov ntaub ntawv Qhov chaw rau PN Cov ntaub ntawv. Xwb, teem Cov ntaub ntawv Qhov chaw rau UDP thiab xyuas kom tseeb tias koj siv daim ntawv thov sab nraud los muab cov ntaub ntawv rau UDP chaw nres nkoj teeb tsa kom raug raws li tau piav qhia hauv dhau los. |
| yuam kev:
MAC TX xav txog tus nruab nrab as tsis khoom |
Kev taw qhia:
MAC Statistics qhov tseem ceeb ntawm Cov ntaub ntawv Lub cev tsis muaj zog thiab lus qhuab qhia kuaj pom, ib feem ntawm MAC TX Kev txheeb cais thiab MAC RX Kev txheeb cais, feem, tsis nce. Kev daws: Txheeb xyuas qhov muaj nuj nqis ntawm qhov nkhaus tam sim no hauv RF Tswv yim Hwj chim daim duab. Teeb lub CCA Zog Kev kuaj pom Qhov pib [dBm] tswj rau tus nqi uas siab tshaj qhov tsawg kawg nkaus tus nqi ntawm qhov nkhaus no. |
| yuam kev:
Xa ntau cov ntaub ntawv pob ntawv tshaj tus MAC ua tau Muab rau tus PHY |
Kev taw qhia:
Cov PN Cov ntaub ntawv Pob ntawv Loj thiab cov PN Pob ntawv Ib Thib ob tau nce. Txawm li cas los xij, qhov ua tiav throughput tsis nce. Kev daws: Xaiv qhov siab dua MCS tus nqi thiab siab dua Subcarrier Hom ntawv. |
| yuam kev:
yuam kev RF chaw nres nkoj |
Kev taw qhia:
Cov RX Hwj chim Spectrum tsis qhia tib nkhaus li tus TX Hwj chim Spectrum nyob rau lwm qhov chaw nres tsheb. Kev daws: |
| Xyuas kom tseeb tias koj muaj cov cables lossis kav hlau txais xov txuas nrog RF chaw nres nkoj uas koj tau teeb tsa ua TX RF Chaw nres nkoj thiab RX RF Chaw nres nkoj. | |
| yuam kev:
MAC chaw nyob tsis sib haum |
Kev taw qhia:
Ntawm Chaw Nres Tsheb B, tsis muaj ACK pob ntawv kis tau tus mob (ib feem ntawm MAC TX Kev txheeb cais) thiab cov RX Tshaj tawm yog zero. Kev daws: Tshawb xyuas qhov ntawd Ntaus ntawv MAC Chaw nyob ntawm chaw nres tsheb B sib tw rau Qhov chaw MAC Chaw nyob ntawm Chaw nres tsheb A. Rau RF Loopback hom, ob qho tib si Ntaus ntawv MAC Chaw nyob thiab Qhov chaw MAC Chaw nyob yuav tsum muaj tib qhov chaw nyob, example 46:6F:4B:75:6D:61. |
| yuam kev:
Siab CFO if Chaw nres tsheb A thiab B yog FlexRIOs |
Kev taw qhia:
Tus nqi them tus neeg nqa khoom ntau zaus offset (CFO) yog siab, uas ua rau tag nrho cov kev ua tau zoo ntawm lub network. Kev daws: Teeb lub Kev siv moos rau PXI_CLK lossis REF IN/ClkIn. · Rau PXI_CLK: Cov ntaub ntawv siv tau los ntawm PXI chassis. · REF IN / ClkIn: Cov ntaub ntawv siv tau los ntawm ClkIn chaw nres nkoj ntawm NI-5791. |
| TX yuam kev Tus nqi yog ib in RF Loopback or Baseband Loopback kev ua haujlwm hom | Kev taw qhia:
Ib qhov chaw nres tsheb nkaus xwb yog siv qhov chaw ua haujlwm tau teeb tsa rau RF Loopback or Baseband Loopback hom. Lub graphical indication ntawm TX yuam kev tus nqi qhia 1. Kev daws: Qhov kev coj cwj pwm no xav tau. Cov pob ntawv ACK ploj thaum MAC TX tseem tos lawv; DCF lub xeev lub tshuab ntawm FPGA ntawm MAC tiv thaiv qhov no nyob rau hauv rooj plaub ntawm RF loopback lossis Baseband Loopback hom. Yog li ntawd, MAC TX ib txwm qhia txog kev sib kis tsis tau. Li no, qhov tshaj tawm TX pob ntawv yuam kev tus nqi thiab TX thaiv qhov yuam kev tus nqi yog xoom. |
Paub Qhov Teeb Meem
Xyuas kom tseeb tias USRP ntaus ntawv twb tau khiav thiab txuas nrog tus tswv tsev ua ntej tus tswv tsev pib. Txwv tsis pub, USRP RIO ntaus ntawv yuav tsis raug lees paub los ntawm tus tswv tsev.
Ib daim ntawv teev tag nrho ntawm cov teeb meem thiab kev daws teeb meem yog nyob ntawm LabVIEW Kev sib txuas lus 802.11 Daim Ntawv Thov Kev Pabcuam 2.1 Paub Cov Teeb Meem.
Cov ntaub ntawv ntsig txog
USRP-2940/2942/2943/2944/2945 Tau Txais Daim Ntawv Qhia USRP-2950/2952/2953/2954/2955 Tau Pib Qhia Phau Ntawv Qhia IEEE Standards Association: 802.11 Wireless LANs Xa mus rau LabVIEW Communications System Design Suite Manual, muaj nyob online, rau cov ntaub ntawv hais txog LabVIEW tswv yim los yog khoom siv nyob rau hauv no sampua project.
Mus saib ni.com/info thiab nkag mus rau Info Code 80211AppFWManual kom nkag mus rau LabVIEW Kev Sib Txuas Lus 802.11 Daim Ntawv Thov Kev Ua Haujlwm Rau Cov Lus Qhia ntxiv txog 802.11 Daim Ntawv Thov Kev Tsim Qauv.
Koj kuj tseem tuaj yeem siv Cov Ntsiab Lus Pab Qhov rai kom paub cov ntaub ntawv yooj yim ntawm LabVIEW khoom thaum koj txav tus cursor hla txhua yam khoom. Txhawm rau tso saib Cov Ntsiab Lus Pab Qhov rai hauv LabVIEW, xaiv View» Cov ntsiab lus pab.
Cov ntsiab lus
| Lub ntsiab lus | Lub ntsiab lus |
| ACK | Kev lees paub |
| AGC | Tsis siv neeg nce tswj |
| A-MPDU | Aggregated MPDU |
| CCA | Kev ntsuam xyuas channel meej |
| CFO | Tus neeg nqa khoom zaus offset |
| CSMA/CA | Tus neeg nqa khoom nkag siab ntau yam nkag nrog kev sib tsoo kom zam dhau |
| CTS | Clear-rau-xa |
| CW | Nruam nthwv dej |
| DAC | Digital rau analog converter |
| DCF | Distributed coordination muaj nuj nqi |
| DMA | Direct nco nkag |
| FCS | Ncej xyuas ib ntus |
| MAC | Nruab nrab nkag mus tswj txheej |
| MCS | Modulation thiab coding tswvyim |
| MIMO | Multi-input-ntau-tso zis |
| MPDU | MAC raws tu qauv data unit |
| NAV | Network faib vector |
| Tsis yog HT | Tsis-high throughput |
| OFDM | Orthogonal zaus-division multiplexing |
| PAPR | Peak rau nruab nrab lub zog piv |
| PHY | Lub cev txheej |
| PLCP | Lub cev txheej txheej convergence txheej txheem |
| PN | Pseudo suab nrov |
| PSDU | PHY service data unit |
| QAM | Plaubuad.. ampkev hloov kho qhov siab |
| RTS | Thov-rau-xa |
| RX | Txais |
| SIFS | Short interframe spacing |
| SISO | Ib qho kev tawm tswv yim ib zaug |
| T2 H | Hom phiaj rau host |
| TX | Kev xa tawm |
| UDP | Cov neeg siv datagram raws tu qauv |
Xa mus rau NI Trademarks thiab Logo Guidelines ntawm ni.com/trademarks yog xav paub ntxiv txog NI trademarks. Lwm cov khoom lag luam thiab cov npe tuam txhab tau hais hauv no yog cov cim lag luam lossis cov npe lag luam ntawm lawv cov tuam txhab. Rau patents npog NI cov khoom / thev naus laus zis, xa mus rau qhov chaw tsim nyog: Pab » Patents hauv koj software, patents.txt file ntawm koj cov xov xwm, lossis National Instruments Patents Notice ntawm ni.com/patents. Koj tuaj yeem nrhiav cov ntaub ntawv hais txog daim ntawv tso cai siv kawg (EULAs) thiab cov ntawv ceeb toom kev cai lij choj thib peb hauv readme file rau koj cov khoom NI. Xa mus rau Export Compliance Information ntawm ni.com/legal/export-ua raws li txoj cai NI thoob ntiaj teb kev lag luam ua raws txoj cai thiab yuav ua li cas kom tau txais HTS codes, ECCNs, thiab lwm yam ntaub ntawv ntshuam/export. NIAG TSIS TXAUS SIAB LOS YOG LEEJ TWG YUAV TSUM TAU TXAIS NTAWM TXOJ HAUJ LWM ntawm cov ntaub ntawv muaj nyob ntawm no thiab yuav tsis muaj kev lav phib xaub rau txhua qhov yuam kev. Tsoom Fwv Teb Chaws Asmeskas Cov Neeg Siv Khoom: Cov ntaub ntawv muaj nyob rau hauv phau ntawv no yog tsim los ntawm tus kheej tus nqi thiab raug rau cov cai txwv thiab txwv cov ntaub ntawv raws li tau teev tseg hauv FAR 52.227-14, DFAR 252.227-7014, thiab DFAR 252.227-7015.
Cov ntaub ntawv / Cov ntaub ntawv
 |
NATIONAL INSTRUMENTS LabVIEW Kev sib txuas lus 802.11 Daim Ntawv Thov Kev Ua Haujlwm 2.1 [ua pdf] Cov neeg siv phau ntawv qhia PXIe-8135, LabVIEW Kev sib txuas lus 802.11 Application Framework 2.1, LabVIEW Kev sib txuas lus 802.11 Daim Ntawv Thov, Ncej 2.1, LabVIEW Kev sib txuas lus 802.11, Daim Ntawv Thov Txheej Txheem 2.1 |