Izindaba

Lapho umthamo wokudlulisela wesiteshi esingokoqobo ungaphezu kwesidingo sesiginali eyodwa, isiteshi singabiwa ngamasignali amaningi. Ngokwesibonelo, umugqa womugqa wesimiso socingo ngokuvamile unezinkulungwane zezimpawu ezidluliselwa ngomcu owodwa wokubona. I-Multiplexing ubuchwepheshe obuxazulula...

1) Ikhodi ye-AMI Igama eligcwele lekhodi ye-AMI (Alternative Mark Inversion) enye ikhodi yokuguqula uphawu. blank) ihlala ingashintshiwe. Isb: Ikhodi yomlayezo: 0 1 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1… Ikhodi ye-AMI: 0 -1 +1 0 0 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… I-waveform ehambisana nekhodi ye-AMI ithi ...

Lapho sidlulisela isignali, kungakhathaliseki ukuthi isignali ye-optical, isignali kagesi, noma isignali engenazintambo, uma idluliswa ngokuqondile, isignali iphazamiseka kalula ngomsindo, futhi kunzima ukuthola ukwaziswa okunembile ekugcineni kokwamukela. Ukuze kuthuthukiswe ikhono lokulwa nokuphazamiseka...

Izindlela eziyisisekelo zokushintshwa kwedijithali kanambambili yilezi: Ukhiye we-amplitude kanambambili (2ASK)—ushintsho lwe-amplitude yesiginali yenkampani yenethiwekhi; I-Binary frequency shift keying (2FSK)—ukushintsha imvamisa yesiginali yenkampani yenethiwekhi; Ukhiye wokushintsha wesigaba kanambambili (2PSK)—ushintsho lwesigaba sesiginali yenkampani yenethiwekhi. Ukhiye wokushintsha wesigaba esihlukile...

Uhlelo lwe-PON lusebenzisa ubuchwepheshe bokuhlukanisa isikhathi sokuphindaphinda ekuqondeni kwe-uplink, futhi i-ONU ithumela ama-datagrams ekuqondeni kwe-uplink ngokuvumelana nesitembu sesikhathi esinikezwe i-OLT. Uma i-ONU ikhipha ukukhanya ngaphandle kokunikeza isitembu sesikhathi, izongqubuzana nezimpawu zokukhishwa kwezinye ku...

Ngokuthuthukiswa kwezinhlelo zokuxhumana ezibonakalayo ezinebanga elide, umthamo omkhulu, kanye nesivinini esiphezulu, ikakhulukazi uma izinga legagasi elilodwa lishintsha ukusuka ku-40g kuya ku-100g noma ngisho ne-super 100g, ukuhlakazeka kwe-chromatic, imiphumela engaqondile, ukuhlakazeka kwemodi ye-polarization, neminye imiphumela yokudlulisela ku. ..