Umdwebo 6-6 umdwebo we-block wesistimu yokudlulisa isignali ye-digital baseband evamile.Ikakhulukazi yakhiwe yisihlungi sokudlulisa (ijeneretha yesignali yesiteshi), isiteshi, isihlungi sokwamukela, kanye nesinqumo samasampuli.Ukuze kuqinisekiswe ukusebenza okuthembekile nokuhlelekile kwesistimu, kufanele futhi kube nohlelo lokuvumelanisa.
Imisebenzi yebhulokhi ngayinye emfanekisweni kanye nenqubo engokomzimba yokudluliselwa kwesignali ichazwa kafushane kanje:
(1) Isiginali yesiteshi yangaphambili (isihlungi sokudlulisela).Umsebenzi wayo ukukhiqiza i-waveform yesignali ye-baseband elungele ukudluliswa kwesiteshi.Ngenxa yokuthi okokufaka kwayo ngokuvamile kuyikhodi yokudlulisela ekhiqizwa uhlobo lwekhodi yombhalo wekhodi, i-waveform eyisisekelo ehambisanayo ngokuvamile i-pulse engunxande, futhi i-spectrum yayo ibanzi kakhulu, engahambisani nokudluliselwa.Isihlungi sokudlulisa sisetshenziselwa ukucindezela ibhendi yesiginali yokufaka nokuguqula ikhodi yokudlulisela ibe i-baseband signal waveform elungele ukudluliswa kwesiteshi.
(2) Isiteshi.Iwumthombo ovumela amasignali e-baseband ukuthi adlule, ngokuvamile ishaneli enezintambo, njengepheya esontekile, intambo ye-coaxial, njll. Izici zokudlulisela zesiteshi ngokuvamile azihlangabezani nezimo zokudlulisela ezingahlanekezeli, ngakho-ke i-waveform yokudlulisela sihlanekezelwe.Ngaphezu kwalokho, umsindo n (T) wethulwa esiteshini, futhi kucatshangwa ukuthi umsindo omhlophe we-Gaussian onenani eliqondile likaziro.
(3) Isihlungi sokwamukela Sisetshenziselwa ukwamukela amasiginali, ukuhlunga umsindo wesiteshi nokunye ukuphazamiseka ngangokunokwenzeka, ukulinganisa izici zesiteshi, nokwenza i-baseband ephumayo ye-waveform ihambisane nezinqumo zesampula.
(4) Isikhethi sesampula.Iwukuba isampula futhi inqume uhlobo lwamagagasi okukhiphayo lwesihlungi esitholwayo ngesikhathi esinqunyiwe (esilawulwa i-bit timeing pulse) ukuze kutholwe noma kukhiqizwe kabusha isiginali ye-baseband ngaphansi kwesizinda sezimpawu zokudlulisa ezingagculisi nomsindo.
(5) Isikhathi se-Pulse kanye ne-synchronous extraction bit time pulse esetshenziselwa amasampula kukhishwa kusiginali eyamukelwe yisekethe yokukhipha ehambisanayo.Ukunemba kwesikhathi esincane kuzothinta umphumela wesinqumo.
Lokhu ukwakheka kohlelo lokudlulisa isignali ye-baseband yedijithali elethwe kuwe i-Shenzhen HDV Phoelectron Technology Co., Ltd.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.
