Tekinoloje ya MIMO imagwiritsa ntchito tinyanga zingapo potumiza ndikulandila ma siginecha m'gawo lolumikizirana opanda zingwe.Ma antennas angapo a ma transmitters ndi olandila amathandizira kwambiri kulumikizana.Tekinoloje ya MIMO imagwiritsidwa ntchito kwambirimauthenga a m'manjam'minda, ukadaulo uwu ukhoza kupititsa patsogolo mphamvu zamakina, kufalikira, ndi chiŵerengero cha signal-to-noise (SNR).
1.Tanthauzo la MIMO
Tekinoloje ya MIMO Wireless Communication imatchedwa ukadaulo wa Multiple-Input Multiple-Out-put (Multiple-Input Multiple-Out-put), ndipo imatha kutchedwanso ukadaulo wa Multiple Transmit Multiple Receive Antenna (MTMRA, Multiple Transmit Multiple Receive Antenna) ukadaulo.
Mfundo yake yayikulu ndikugwiritsa ntchito tinyanga zotumizira zingapo ndikulandila tinyanga pamapeto pake ndikulandila motsatana, ndikutha kusiyanitsa ma sign omwe amatumizidwa kapena kuchokera kumadera osiyanasiyana.Ikhozanso kupititsa patsogolo mphamvu zamakina, kuphimba ndi chiŵerengero cha chizindikiro-ku-phokoso popanda kuwonjezereka kwa bandwidth ndi kufalitsa mphamvu, ndikusintha khalidwe lotumizira ma siginecha opanda zingwe.
Ndizosiyana ndi njira zachikhalidwe zopangira ma siginecha chifukwa zimaphunzira zovuta zamasinthidwe anthawi ndi malo.Monga tawonera m'chithunzi pansipa, iyi ndi kachitidwe ka MIMO kokhala ndi tinyanga ta Nt ndi Nr pa transmitter ndi wolandila motsatana.
Njira yosavuta ya MIMO
2. Gulu la MIMO
Malinga ndi mikhalidwe yosiyanasiyana komanso malo osiyanasiyana opanda zingwe, zotsatirazi ndi njira zinayi zogwiritsiridwa ntchito za MIMO: SISO, MISO ndi SIMO.
3.Maganizo ofunikira mu MIMO
Pali malingaliro ambiri omwe akukhudzidwa mu MIMO, otsutsa kwambiri omwe ndi awa atatu: kusiyanasiyana, kuchulukitsitsa ndi kuwongolera.
Kusiyanasiyana ndi kuchulukitsa kumatanthawuza njira ziwiri zogwirira ntchito zaukadaulo wa MIMO.Apa tikuwonetsani mfundo zoyambirira.
● Kusiyanasiyana: kumatanthauza kutumiza kwa chizindikiro chomwecho panjira zambiri zodziyimira pawokha.Ndiko kuti, chizindikiro chomwecho, njira zodziimira.
●Multiplexing: amatanthauza kutumiza ma siginecha angapo odziyimira pawokha panjira yomweyo yotumizira.Ndiko kuti, zizindikiro zosiyana, njira wamba.
Apa timagwiritsa ntchito tebulo kusonyeza mwachidule ubale pakati pawo.
| Njira yogwirira ntchito | Cholinga | Njira | Njira |
| Zosiyanasiyana | Limbikitsani kudalirika | Chepetsani kuzimiririka | danga nthawi coding |
| Multiplexing | Limbikitsani zotulukapo | Gwiritsani ntchito mwayi wakuzirala | Spatial Multiplexing |
Pomaliza, tiyeni tikambirane za beamforming.Apa tikupatsaninso lingaliro lofunikira: ndiukadaulo wopanga ma siginecha omwe amagwiritsa ntchito gulu la sensa kuti atumize ndikulandila zidziwitso kunjira.Ndiko kupanga chizindikiro chotumizidwa ndi mlongoti kuti chikhale cholunjika, makamaka chokhoza kuloza molondola kwa wogwiritsa ntchito popanda kutaya mphamvu.
● Munkhani 1, kachipangizo ka mlongoti kamatulutsa pafupifupi mphamvu yofanana mbali zonse.Mosasamala kanthu za mtunda wapakati pa ogwiritsira ntchito atatu ndi malo oyambira, ngakhale wogwiritsa ntchito aliyense angapeze mphamvu yofanana ya chizindikiro, pamakhalabe chizindikiro chochuluka chomwe chimabalalika mu malo aulere, zomwe zimayambitsa kutaya mphamvu mu siteshoni yoyambira.
● Pankhani ya 2, kuwala kwa mphamvu ya mlongoti kumakhala kolunjika kwambiri, ndiko kuti, mphamvuyo imakhala yaikulu momwe angathere komwe wogwiritsa ntchito alipo ndipo mphamvuyo imakhala pafupifupi kugawidwa m'njira zopanda ntchito.Ukadaulo womwe umapanga ma sigino a mlongoti ndi womwe timatcha kuti beamforming.
4.Ubwino wa MIMO
● Kupititsa patsogolo mphamvu ya Channel
Makina a MIMO amatha kukulitsa mphamvu ya mayendedwe pansi pazigawo zazikulu za ma sign-to-noise ndipo atha kugwiritsidwa ntchito pansi pamikhalidwe yomwe wotumizayo sangathe kupeza chidziwitso chanjira.Itha kuonjezeranso kuchuluka kwa kufalikira kwa zidziwitso popanda kuwonjezera mphamvu ya bandwidth ndi mlongoti, potero kupititsa patsogolo kagwiritsidwe ntchito ka sipekitiramu.
●Kudalirika kwa tchanelo
Kugwiritsa ntchito ukadaulo wochulukirachulukira woperekedwa ndi mayendedwe a MIMO kumatha kupititsa patsogolo kukhazikika kwadongosolo ndikuwonjezera kuchuluka kwa kufalikira.
Mapeto
Mtengo wa FDM-6680ndi wailesi ya SWaP yotsika mtengo, yotsika mtengo ya 2x2 MIMO yomwe imapereka kufalikira kwakutali m'malo ambiri ogwirira ntchito ndi 100-120Mbps data.Zambiri chonde pitaniIWAVEwebusayiti.
Nthawi yotumiza: Dec-18-2023
