Ubuchwepheshe be-MIMO busebenzisa izimpondo eziningi ukudlulisa nokwamukela amasiginali emkhakheni wezokuxhumana okungenantambo.Ama-antenna amaningi awo womabili ama-transmitters nabemukeli athuthukisa kakhulu ukusebenza kokuxhumana.Ubuchwepheshe be-MIMO busetshenziswa kakhulu kuezokuxhumana ngomakhalekhukhwiniEzinkundleni zokuxhumana, lobu buchwepheshe bungathuthukisa kakhulu umthamo wesistimu, ububanzi bokuhlanganisa, nesilinganiso sesignali-kuya-noise (SNR).
1.Incazelo ye-MIMO
Ubuchwepheshe be-MIMO Wireless Communication bubizwa ngobuchwepheshe be-Multiple-Input Multiple-Out-put (Multiple-Input Multiple-Out-put), futhi bungabizwa nangokuthi ubuchwepheshe be-Multiple Transmit Multiple Receive Antenna (MTMRA, Multiple Transmit Multiple Receive Antenna) ubuchwepheshe.
Umgomo wayo oyisisekelo ukusebenzisa izinti eziningi ezidlulisayo kanye nokwamukela izimpondo ekugcineni kokudlulisela kanye nokwamukela ekugcineni ngokulandelana kwazo, futhi ukwazi ukuhlukanisa amasignali athunyelwa noma asuka ezindleleni ezihlukene zendawo.Ingase futhi ithuthukise umthamo wesistimu, ukumbozwa kanye nesilinganiso sesignali-kuya-nomsindo ngaphandle kokukhuphula umkhawulokudonsa kanye nokudlulisa amandla, futhi ithuthukise ikhwalithi yokudlulisela yamasignali angenantambo.
Ihlukile ezindleleni zendabuko zokucubungula isignali ngoba ifunda izinkinga zokucubungula amasignali kuzo zombili izici zesikhathi nesikhala.Njengoba kukhonjisiwe kuMfanekiso ongezansi, lolo uhlelo lwe-MIMO olunama-antenna e-Nt kanye ne-Nr kumthumeli nomamukeli ngokulandelanayo.
Isistimu ye-MIMO elula
2.Ukuhlukaniswa kwe-MIMO
Ngokwezimo ezihlukene kanye nezindawo ezihlukene ezingenazintambo, okulandelayo yizindlela ezine ezivame ukusetshenziswa ze-MIMO: i-SISO, i-MISO ne-SIMO.
3.Imiqondo ebalulekile ku-MIMO
Miningi imiqondo ehilelekile ku-MIMO, ebucayi kakhulu yilena emithathu elandelayo: ukuhlukahluka, ukuphindaphindeka kanye nokwenza i-beamforming.
Ukuhlukahluka nokuphindaphinda kubhekisela ezindleleni ezimbili zokusebenza zobuchwepheshe be-MIMO.Lapha sizokukhombisa imiqondo eyisisekelo kuqala.
● Ukuhlukahluka: kubhekisela ekudlulisweni kwesignali efanayo ezindleleni eziningi zokudlulisela ezizimele.Okusho ukuthi, isignali efanayo, iziteshi ezizimele.
● I-Multiplexing: ibhekisela ekudluliseni amasignali amaningi azimele endleleni efanayo yokudlulisela.Okungukuthi, amasignali ahlukene, iziteshi ezivamile.
Lapha sisebenzisa itafula ukukhombisa kafushane ubudlelwano phakathi kwabo.
| Imodi yokusebenza | Inhloso | Izindlela | Kusho |
| Ukuhlukahluka | Thuthukisa ukwethembeka | Yehlisa ukufiphala | ukufakwa kwamakhodi kwesikhathi sesikhala |
| I-Multiplexing | Thuthukisa ukusebenza | Thatha ithuba lokufiphala | I-Spatial Multiplexing |
Okokugcina, ake sikhulume ngokwenza i-beamforming.Lapha sizophinde sikunikeze umqondo oyisisekelo: ubuchwepheshe bokucubungula isignali obusebenzisa uhlu lwezinzwa ukuthumela nokwamukela amasignali ngendlela.Okokwenza isiginali ethunyelwe uthi iqonde ngqo, okungcono ikwazi ukukhonjwa ngokunembile kumsebenzisi ngaphandle kokuvuza kwamandla.
●Endabeni 1, isistimu ye-antenna ikhipha cishe inani elifanayo lamandla kuzo zonke izinhlangothi.Kungakhathaliseki ukuthi ibanga elingakanani phakathi kwabasebenzisi abathathu kanye nesiteshi sesisekelo, nakuba umsebenzisi ngamunye angathola amandla esignali alinganayo, kusekhona inani elikhulu lesignali ehlakazekile endaweni yamahhala, okubangela ukuchithwa kwamandla esiteshini sesisekelo.
●Esimeni sesi-2, imisebe yamandla yothi iqondisa ngokwedlulele, okungukuthi, amandla makhulu ngangokunokwenzeka endaweni lapho umsebenzisi ekhona futhi amandla acishe asakazwe ezindleleni ezingenamsebenzi.Ubuchwepheshe obulolonga amasignali e-antenna yilokho esikubiza ngokuthi i-beamforming.
4.Izinzuzo ze-MIMO
● Ukuthuthukiswa komthamo wesiteshi
Amasistimu e-MIMO angakhuphula umthamo wesiteshi ngaphansi kwezimo zesilinganiso esiphezulu sesignali-to-noise futhi angasetshenziswa ngaphansi kwezimo lapho umthumeli engakwazi ukuthola ulwazi lwesiteshi.Ingase futhi inyuse izinga lokudluliswa kolwazi ngaphandle kokwandisa umkhawulokudonsa namandla okudlulisa izinti, ngaleyo ndlela ithuthukise kakhulu ukusetshenziswa kwe-spectrum.
●Ukuthembeka kwesiteshi okuthuthukisiwe
Ukusebenzisa ubuchwepheshe bokuphindaphinda kwendawo obuhlinzekwa iziteshi ze-MIMO kungathuthukisa kakhulu ukuzinza kwesistimu futhi kukhuphule izinga lokudlulisela.
Isiphetho
I-FDM-6680iyirediyo ye-SWaP ephansi, ebiza kancane engu-2x2 MIMO enikeza ukumbozwa kwebanga elide ezindaweni ezibanzi zokusebenza ngenani ledatha elingu-100-120Mbps.Imininingwane eyengeziwe sicela uvakasheleIWAVEiwebhusayithi.
Isikhathi sokuthumela: Dec-18-2023
