Umfanekiso 6-6 umdwebo webhulokhi wesistimu yokudlulisa isignali ye-digital baseband evamile. Ikakhulukazi yakhiwe ngesihlungi esithumelayo (ijeneretha yesignali yesiteshi), isiteshi, isihlungi sokwamukela kanye nesinqumo samasampula. Ukuze kuqinisekiswe umsebenzi othembekile nohlelekile wesistimu, kufanele futhi kube nesistimu yokuvumelanisa.
Imisebenzi yebhokisi ngalinye emfanekisweni kanye nenqubo ebonakalayo yokudluliselwa kwesignali ichazwa kanje:
(1) Ijeneretha yesiginali yesiteshi (ukudlulisa isihlungi). Umsebenzi wayo ukukhiqiza i-baseband signal waveform elungele ukudluliswa kwesiteshi. Ngenxa yokuthi okokufaka ngokuvamile kuyikhodi yokudlulisela ekhiqizwe isifaki khodi sekhodi, i-waveform eyisisekelo ehambisanayo ngokuvamile i-pulse engunxande, futhi i-spectrum yayo ibanzi kakhulu, engahambisani nokudluliselwa. Isihlungi sokudlulisa sisetshenziselwa ukucindezela ibhendi yefrikhwensi yesignali yokufaka futhi siguqule ikhodi yokudlulisela ibe i-baseband signal waveform elungele ukudluliswa kwesiteshi.
(2) Isiteshi. Iwumthombo ovumela amasignali e-baseband ukuthi adlule, ngokuvamile isiteshi esinezintambo, njengepheya esontekile, intambo ye-coaxial, njll. Izici zokudlulisela zesiteshi ngokuvamile azihlangabezani nezimo zokudlulisela okungahlanekezeli, ngakho kuzodala ukuhlanekezela. yokudluliselwa kwe-waveform. Ngaphezu kwalokho, isiteshi sethula umsindo othi n(t) futhi sicabange ukuthi umsindo omhlophe we-Gaussian onencazelo enguziro.
(3) Ithola isihlungi. Isetshenziselwa ukwamukela isignali, ihlunge umsindo wesiteshi nokunye ukuphazamiseka ngangokunokwenzeka, ibhalansile izici zesiteshi, futhi yenze ifomethi ye-baseband ephumayo ihambisane nesinqumo sesampula.
(4) Isinqumo samasampula. Ngaphansi kwesizinda sezici zokudlulisela ezingagculisi nomsindo, i-waveform ephumayo yesihlungi esamukelayo isampula ngesikhathi esishiwo (elawulwa ukushaya kwezikhathi kancane) ukuze kubuyiselwe noma kuvuselelwe isignali ye-baseband.
(5) Isikhathi sokushaya kwenhliziyo kanye nokukhipha okuhambisanayo. I-bit time pulse esetshenziselwa ukusampula ikhishwa kusiginali eyamukelwe yisekethe yokukhipha ehambisanayo, futhi ukunemba kwesikhathi esincane kuzothinta ngokuqondile umphumela wesinqumo.
Lena indawo ka-ShenzhenI-HDV Phoi-electron Ubuchwepheshe Ltd. ukukulethela "Ukwakheka kwesistimu yokudlulisa isignali ye-digital baseband", ngithemba ukukusiza, kanye ne-ShenzhenI-HDV Phoi-electron Technology Ltd ngaphezuI-ONUuchungechunge, uchungechunge lwe-transceiver,OLTuchungechunge, kodwa futhi ukukhiqiza uchungechunge module, ezifana: Ukuxhumana module optical, optical zokuxhumana module, inethiwekhi module optical, zokuxhumana module optical, optical fibre module, Ethernet optical fibre module, njll, anganikeza isevisi izinga elihambisana izidingo zabasebenzisi ezahlukene ' , wamukele ukuvakashelwa kwakho.
