Izindlela eziyisisekelo zokuguquguquka kwedijithali okuyizi:Ukhiye we-amplitude kanambambili (2ASK)—ushintsho lwe-amplitude yesiginali yenkampani yenethiwekhi; I-Binary frequency shift keying (2FSK)—ukushintsha kwemvamisa yesiginali yenkampani yenethiwekhi; Ukhiye wokushintsha wesigaba kanambambili (2PSK)—ushintsho lwesigaba sesiginali yenkampani yenethiwekhi. I-Differential phase shift keying (DPSK) yenziwe ngoba isigaba sohlelo lwe-2PSK besingaqiniseki.
I-2ASK ne-2PSK zombili zidinga umkhawulokudonsa ophindwe kabili kunesilinganiso sophawu, kuyilapho i-2FSK idinga umkhawulokudonsa omningi kuno-2ASK no-2PSK.
Izinga lephutha elincane lezinhlelo ezihlukahlukene kanambambili zokuguquguquka kwedijithali lincike esilinganisweni sokufaka sesignali-kuya-kumsindo r sedemodulator. Mayelana nomsindo omhlophe we-Gaussian omelene nokungezwayo, i-2PSK ehambisanayo inokusebenza okuhle kakhulu, ilandelwa i-2FSK, futhi i-2ASK iyona embi kakhulu.
Ukubuza kungenye yezindlela zokuqala eziyisisekelo zokuguquguqula. Ubuhle bayo ukuthi isebenzisa i-high-frequency band futhi inemishini elula. Ububi bayo ukuthi ayikwenziisebenza kahle ngokumelene nomsindo futhi izwela izinguquko ezicini zesiteshi, okwenza kube nzima ukuthola onquma amasampula ukuthi asebenze esimweni esingcono kakhulu somkhawulo wesinqumo.
I-FSK iyindlela esemqoka yokushintshashintsha ekuxhumaneni kwedijithali. Inzuzo yayo ukuthi inekhono eliqinile lokulwa nokuphazamiseka futhi ayithinteki ngokushintsha kwemingcele yesiteshi, ngakho-ke i-FSK ifaneleka ngokukhethekile iziteshi eziphelayo; Okubi ukuthi ibhendi ethathiwe ibanzi, ikakhulukazi i-mf-sk, futhi ukusetshenziswa kwebhendi kuphansi. Njengamanje, uhlelo lwe-FM lusetshenziswa kakhulu ekudluliselweni kwedatha okumaphakathi nesivinini esiphansi.
I-PSK noma i-DPSK iyindlela yokushintshashintsha enekhono eliphezulu lokudlulisa. Ikhono layo lokulwa nomsindo linamandla kune-ASK ne-FSK, futhi alithinteki kalula ngokushintsha kwezici zesiteshi. Ngakho-ke, isetshenziswe kabanzi ekudluliselweni kwedatha ephezulu kanye nesivinini esiphakathi. I-Absolute phase shift (PSK) inenkinga yokungaqondakali kwesigaba senkampani yenethiwekhi ekunciphiseni okuhambisanayo, okungavamile ukusetshenziswa ekudluliseni okuqondile ekusebenzeni. I-MDPSK isetshenziswa kabanzi.
Okungenhla isihloko esithi “Binary digital modulation,” olethwe kuwe yi-Shenzhen HDV photoelectric Technology Co., Ltd. Imikhiqizo yokuxhumana ekhiqizwe ikhava yenkampani:
Izigaba zamamojula: amamojula we-fiber optical, Amamojula we-Ethernet, amamojula we-fiber optical transceiver, amamojula okufinyelela kwefiber optical, Amamojula we-SSFP optical, futhiImicu ye-Optical SFP, njll.
I-ONUisigaba: EPON ONU, AC ONU, i-fiber optical ONU, I-CATV ONU, I-GPON ONU, XPON ONU, njll.
OLTisigaba: Ukushintsha kwe-OLT, I-GPON OLT, I-EPON OLT, ukuxhumanaOLT, njll.
Imikhiqizo yemojula engenhla ingahlinzeka ngosekelo lwezimo zenethiwekhi ezahlukahlukene. Ithimba le-R&D elichwepheshile neliqinile lingasiza amakhasimende anezinkinga zobuchwepheshe, futhi ithimba lebhizinisi elicabangayo nelichwepheshile lingasiza amakhasimende ukuthi athole amasevisi ekhwalithi ephezulu ngesikhathi sokubonisana kwangaphambilini nomsebenzi wangemuva kokukhiqiza. Siyakwamukela kuXhumana nathinganoma yiluphi uhlobo lombuzo.
