Zivo

Apo patinotumira chiratidzo, kana chiri chiratidzo chemaziso, chiratidzo chemagetsi, kana chikwangwani chisina wire, kana chikatumirwa zvakananga, chiratidzo chinovhiringidzwa nyore nyore neruzha, uye zvakaoma kuwana ruzivo rwakarurama pamagumo ekugamuchira. Kuti uvandudze anti-kupindira abilit ...

Nzira dzekutanga dzebhinari yedhijitari modulation ndeiyi: Binary amplitude keying (2ASK) -kushanduka kweamplitude yechiratidzo chekutakura; Binary frequency shift keying (2FSK) - frequency shanduko yechiratidzo chekutakura; Binary phase shift keying (2PSK)—chikamu chekuchinja kwechiratidzo chekutakura. Differential phase shift keyin...

Iyo PON system inotora nguva-division multiplexing tekinoroji mune iyo uplink direction, uye ONU inotumira datagraphs kune iyo uplink direction zvinoenderana nenguva yechitambi yakagoverwa neOLT. Kana ONU ikaburitsa mwenje isina kupa chitambi chenguva, inopokana nemasaini ekuburitsa eimwe pa...

Nekuvandudzwa kwemaoptical communication systems ane chinhambwe chakareba, hukuru hukuru, uye kukurumidza kukurumidza, kunyanya kana imwe wave wave ichishanduka kubva pa40g kusvika 100g kana kunyange super 100g, chromatic dispersion, nonlinear effects, polarization mode dispersion, uye mamwe maitiro ekutapurirana mukati. ..

Kodhi yekuona kukanganisa (parity check code): parity check code ine n-1 bit information unit uye 1 bit check element. Iyo N-1 bit information unit idata rinoshanda muruzivo rwatinotumira, uye 1-bit cheki unit inoshandiswa pakuona kukanganisa uye redundancy kodhi. Odd cheki: kana iyo n...

Mhoro, Vaverengi. Muchikamu chino ndichakurukura nezve OSI-Data Link Layer Error Control netsananguro. Ngatitangei… Kuti tinzwisise kufambiswa kweiyo data link layer ngatitorei muenzaniso, kana mudziyo weA uchifanira kutaurirana neB mudziyo, chinongedzo chekutaurirana ...