Abokan ciniki da yawa suna tambaya lokacin zabar wanimai watsa bidiyo mai mahimmanci- menene bambanci tsakaninCOFDM mai watsa bidiyo mara wayada OFDM mai watsa bidiyo?
COFDM An Kaddamar da OFDM, A cikin wannan shafin za mu tattauna shi don taimaka muku gano wane zaɓi ne zai fi dacewa da aikace-aikacen ku.
1. OFDM
Fasahar OFDM tana raba tashar da aka bayar zuwa manyan tashoshi na orthogonal da yawa a cikin yankin mitar.Ana amfani da mai ɗaukar kaya ɗaya don daidaitawa akan kowane tashar tashar, kuma kowane mai ɗaukar kaya ana watsa shi a layi daya.Ta wannan hanyar, ko da yake gabaɗaya tashar ba ta da tushe kuma zaɓin mita.Amma kowane tashar tashoshi yana da ɗan lebur.Ana yin watsa watsawar kunkuntar akan kowane tashoshi, kuma bandwidth ɗin siginar ya fi ƙanƙanta fiye da madaidaicin bandwidth na tashar.Sabili da haka, ana iya kawar da tsangwama tsakanin siginar sigina.
Tun da masu ɗaukar kowane tashar tashoshi suna bin juna a cikin tsarin OFDM.Bakan nasu ya mamaye juna.Wannan ba kawai yana rage tsangwama tsakanin masu ɗaukar kaya ba, har ma yana inganta amfani da bakan.
2. COFDM
COFDMis Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararren Ƙwararru, wanda ke nufin
kafin daidaitawar OFDM, ana shigar da rafin lambar dijital.
Menene wannan Coded yake yi?Shi ne tashoshi codeing (source codeing ne don magance matsalar yadda ya dace, da kuma tashar codeing ne don tabbatar da amincin watsawa).
Hanya ta musamman ita ce:
2.1.Gyara Kuskuren Gaba (FEC)
Misali, 100 ragowa na bayanai yana buƙatar canza sudominwatsaing.Da farko canza shi zuwa 200 bits,.Lokacin da aka karɓi siginar, ko da an sami matsala tare da watsa 100 ragowa, ana iya rage madaidaicin bayanai.A takaice, shi ne don ƙara sakewa kafin daidaitawa don inganta amincin watsawa.Ana kiran wannan Kuskuren Ciki (FEC) a cikin tsarin COFDM.Kuma it shine muhimmin siga na tsarin COFDM.
2.2.Tsakanin Tsaro
Fko manufar solvingda yawa-matsalar hanyawatosiginar da aka watsa tana kaiwa ƙarshen karɓa ta hanyoyin watsawa da yawa. Aan saka tazarar gadi tsakanin ragowar bayanan da aka watsa.
3.Kammalawa
Bambanci tsakanin COFDM da OFDM shine cewa ana ƙara lambobin gyaran kurakurai da tazara na gadi kafin daidaitawa na orthogonal don sa watsa siginar ya fi tasiri.
OFDM yana warware faɗuwar tashar zaɓi a cikin da yawa-yanayin hanya da kyau, amma har yanzu bai shawo kan tasha ba tukuna.
COFDM yana ba da damar faɗuwar kowace siginar lambar naúrar yayin watsa don ɗaukar matsayin mai zaman kanta ta ƙididdiga ta hanyar coding, ta haka ne ke kawar da tasirin faɗuwar faɗuwa da motsin mitar Doppler.
4.Aikace-aikacen OFDM da COFDM
COFDM ya dace sosai don watsa mara waya a lokacinbabban gudunmotsi.Kamar Hd wmaras kyautfansavwatamauta, jiragen ruwasadarwar raga, jirage masu saukar unguluCofdm Hd Transmitter dalongrfushidronevra'ayitfansa.
COFDM kuma yana da ƙarfin nlos mai ƙarfi.Ya dace da aikace-aikacen a cikin wuraren da ba na gani ba da toshewa kamar yankunan birane, kewayen birni, da gine-gine, kuma yana nuna kyakkyawan iyawar "rarrabuwa" da "shigarwa".
OFDM yana ba da damar ingantaccen amfani da bakan kuma yana iya jure wa faɗuwar zaɓen mitar, wanda koyaushe ana amfani dashi a cikin hanyar sadarwar LTE da wifi.
Lokacin aikawa: Juni-12-2023
