Lapho i-umthamo wokudlulisawesiteshi esibonakalayo siphezulu kunesidingo sesiginali eyodwa, isiteshi singabiwa ngamasignali amaningi.Ngokwesibonelo, umugqa womugqa wesimiso socingo ngokuvamile uba nezinkulungwane zezimpawu ezidluliselwa ngomcu owodwa wokubona. I-Multiplexing ubuchwepheshe obuxazulula indlela yokusebenzisa isiteshi ukudlulisa amasignali amaningi ngesikhathi esisodwa. Inhloso iwukusebenzisa ngokugcwele ibhendi yefrikhwensi noma izinsiza zesikhathi zesiteshi nokuthuthukisa izinga lokusebenzisa isiteshi.
Banguizindlela ezimbili ezijwayelekile zokuphindaphinda isignali: i-frequency division multiplexing (FDM) kanye ne-time division multiplexing (TDM) Ukuphindaphinda kokuhlukaniswa kwesikhathi kuvame ukusetshenziselwa ukuphindaphinda amasignali edijithali. I-multiplexing ye-frequency division isetshenziswa kakhulu ekuphindaphindeni amasignali e-analogue kodwa futhi ingasetshenziselwa amasignali edijithali. Lesi sigaba sizoxoxa ngomgomo kanye nokusetshenziswa kwe-FDM.
I-Frequency division Multiplexingkuyindlela yokuphindaphinda ehlukanisa iziteshi ngokuya ngobuningi. Ku-FDM, umkhawulokudonsa wesiteshi uhlukaniswa waba ubuningi bamabhendi amafrikhwensi (amashaneli amancane) angadlulelani. Ishaneli ngayinye yamasignali ithatha enye yamashaneli amancane, futhi amabhendi efrikhwensi angasetshenzisiwe (amabhendi onogada) kufanele agcinwe phakathi kwamashaneli ukuze kuvinjelwe ukugqagqana kwesignali. Ekupheleni kokwamukela, isihlungi se-band-pass esifanele sihlukanisa amasignali amaningi futhi sibuyisele amasignali adingekayo.
Umfanekiso olandelayo uyabonisaumdwebo we-block block wesistimu ye-multiplexing ye-frequency division. Ekupheleni kokudlulisela, isiginali yezwi ngayinye ye-baseband iqala idlule kusihlungi se-low-pass (LPF) ukuze kukhawulwe imvamisa ephezulu kakhulu yesignali ngayinye. Khona-ke, isiteshi ngasinye samasiginali sishintshwa sibe ngamafrikhwensi enkampani yenethiwekhi ehlukene, ukuze isiteshi ngasinye samasiginali sithuthelwe kububanzi baso bemvamisa, bese sihlanganiswa bese sithunyelwa esiteshini ukuze sidluliselwe. Uchungechunge lwezihlungi ze-band-pass ezinamaza amaphakathi ahlukene ekugcineni kokwamukela zisetshenziselwa ukuhlukanisa amasignali ashintshiwe. Ngemva kokwehliswa, amasignali e-baseband ahambisanayo esiteshi ngasinye ayatholakala.
Ukuze uvimbeleukugxambukelaphakathi kwamasignali aseduze, imvamisa yenkampani yenethiwekhi F kufanele ikhethwe ngokunengqondo_ c1,f_ c2,···,f_ Cn ukuze ibhendi ethile yonogada igcinwe phakathi kwe-spectrum yesignali eshintshiwe.
YilokhuI-Shenzhen HDV phoelelectron Technology Co., Ltd. ikulethele ngolwazi lwe-frequency division multiplexing. Ngethemba ukuthi lesi sihloko singakusiza ukukhulisa ulwazi lwakho. Ngaphandle kwalesi sihloko uma ufuna inkampani enhle yabakhiqizi bemishini yokuxhumana ye-fiber ongase uyicabangeleMayelana NATHI.
I-Shenzhen HDV photoelectric Technology Co., Ltd. ingumkhiqizi wemikhiqizo yezokuxhumana. Njengamanje, imishini ekhiqizwayo ihlanganisaUchungechunge lwe-ONU, optical module uchungechunge, Uchungechunge lwe-OLT, futhiuchungechunge lwe-transceiver. Singahlinzeka ngezinsizakalo ezenziwe ngezifiso ezimweni ezahlukahlukene. Wamukelekilebonisana.
