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FDM kont TDM-Diferans ant FDM ak TDM
Paj sa a sou FDM kont TDM dekri diferans ant FDM ak multiplexage TDM trè itil pou enjenyè telecom. TDM (Tan Divizyon miltiplikasyon) ak FDM (Frekans divizyon multiplexing) yo se de teknik yo nan multiplèkran. Diferans ki komen ant TDM ak FDM se ke TDM pataje tan an pou siyal yo diferan; Lè nou konsidere ke FDM pataje echèl la frekans pou siyal yo diferan.FDM se fòm nan kout nan multiplexaj divizyon frekans ak TDM se fòm nan kout nan multiplajaj divizyon tan.
#FDM
Nan FDM chak siyal module sou diferan inik RF konpayi asirans frekans ak tout konpayi asirans frekans yo separe siyifikativman pou bandwidth nan siyal yo pa sipèpoze nan domèn frekans.
Jan yo montre nan figi a.1 kat sous siyal yo manje nan yon multiplèkteur ak ke chak modile sou diferan RF transpòtè sa vle di f1, f2, f3 ak f4. Pou anpeche entèferans ant kanal adjasan sa vle di adjasan chanèl entèferans, chak transpòtè RF yo separe pa Gwoup Mizik gad. Pou konprann plis sou diferans ant FDM ak TDM, refere tou FDMA vs TDMA vs CDMA.
Gade tou: >>Ki sa ki se diferans ki genyen ant AM ak FM?
Nan TDM, plis pase yon sèl siyal dijital ka pote sou yon sèl mwayen pou transmisyon pa antrea chak siyal nan tan.
Jan yo montre nan figi 2, kat chanèl chak gen apeprè 2.4 kbps pousantaj done ka akomode / multipliké sou yon sèl liy ki gen kapasite yo pote 9.6kbps lè l sèvi avèk TDM. TDM se pa sèlman itilize pou siyal dijital, men tou yo itilize pou siyal analòg tou.
Konbinezon nan TDM ak FDM konplo se posib tou kote nan frekans premye divize an kantite chanèl jan sa nesesè pa sistèm epi pita chak c.hannel se plis divize an entèval tan via TDM.
Gade tou: >>AM reseptè vs reseptè FM | Diferans ant reseptè AM ak reseptè FM
1) TDM ap travay nan transmisyon PCM pou jwenn T1 nan pousantaj 1.544Mbps.
2) FDM ap travay nan satelit, radyo, HF ak lòt teknoloji san fil.
3) Tou de TDM ak FDM ap travay nan GSM teknoloji selilè, Voye GSM Frame estrikti pou plis enfòmasyon. GSM ankadreman estrikti sèvi ak FTDMA (konbinezon de FDMA ak TDMA).
Si ou vle achte nenpòt euipments FM / TV pou difize, tanpri ou lib pou kontakte nou pa Imèl: [imèl pwoteje].?
