Nekuvandudzwa kweiyo optical communication system ine chinhambwe chakareba, hukuru hukuru uye kukurumidza kukurumidza, kunyanya kana imwe wave wave ichishanduka kubva ku40g kusvika 100g kana kunyange super 100g, chromatic dispersion, nonlinear effect, polarization mode dispersion uye mamwe mafambisirwo ekutapurirana mufiber optical. zvinokanganisa zvakanyanya kuvandudzwa kwemwero wekutapurirana uye kureba kwekutapurirana.Naizvozvo, nyanzvi dzeindasitiri dzinoramba dzichitsvaga nekugadzira FEC kodhi mhando nekuita zvirinani kuti uwane yakakwirira net coding kuwana (NCG) uye zvirinani kugadzirisa kukanganisa kuita, kuitira kuti isangane nezvinodiwa zvekukurumidza kusimudzira kwe optical communication system.
1, Zvinoreva uye musimboti weFEC
FEC (mberi kukanganisa kururamisa) inzira yekuwedzera kuvimbika kwekutaurirana kwedata.Kana iyo yekuona chiratidzo ichikanganiswa panguva yekutapurirana, iyo yekupedzisira yekugamuchira inogona kukanganisa iyo "1" chiratidzo se "0" chiratidzo, kana kukanganisa "0" chiratidzo se "1" chiratidzo.Naizvozvo, basa reFEC rinoumba kodhi yeruzivo mune kodhi ine imwe kukanganisa kugadzirisa kugona pane chiteshi encoder pamagumo ekutumira, uye decoder yechiteshi pamagumo ekugamuchira inotema kodhi yakagamuchirwa.Kana iyo nhamba yezvikanganiso inogadzirwa mukufambiswa iri mukati meyero yekukanganisa kugadzirisa kugona (kuramba zvikanganiso), iyo decoder inowana nekugadzirisa zvikanganiso kuvandudza kunaka kwechiratidzo.
2, Mhando mbiri dzekugamuchira masaini ekugadzirisa nzira dzeFEC
FEC inogona kukamurwa kuita zvikamu zviviri: yakaoma sarudzo decoding uye yakapfava sarudzo decoding.Yakaoma sarudzo decoding inzira yekunyora yakavakirwa pane yechinyakare maonero ekukanganisa kugadzirisa kodhi.Iyo demodulator inotumira mhedzisiro yesarudzo kune decoder, uye decoder inoshandisa algebraic chimiro checodeword kugadzirisa kukanganisa zvinoenderana nemugumisiro wesarudzo.Yakapfava sarudzo decoding ine yakawanda chiteshi ruzivo pane yakaoma sarudzo decoding.Iyo decoder inogona kushandisa zvizere ruzivo urwu kuburikidza nekugona kudhikodha, kuitira kuti uwane yakakura coding pfuma pane yakaoma sarudzo decoding.
3, Nhoroondo yekuvandudza yeFEC
FEC yakasangana nezvizvarwa zvitatu maererano nenguva nekuita.Chizvarwa chekutanga cheFEC chinotora kodhi yakaomesesa yesarudzo, mumiriri weiyo RS (255239), iyo yakanyorwa muITU-T G.709 uye ITU-T g.975 zviyero, uye iyo codeword kumusoro ndeye 6.69%.Kana iyo yakabuda ber = 1e-13, iyo mambure ekodha kuwana inenge 6dB.Chizvarwa chechipiri cheFEC chinotora sarudzo yakaoma yakasungirirwa kodhi, uye inoshanda zvizere concatenation, interleaving, iterative decoding uye humwe hunyanzvi.Iyo codeword pamusoro pepamusoro ichiri 6.69%.Kana iyo yakabuda ber = 1e-15, kuwana kwayo mambure ekodhi inodarika 8dB, iyo inogona kutsigira kureba kwekufambisa zvinodiwa zve10G uye 40g masisitimu.Chizvarwa chechitatu FEC chinotora sarudzo yakapfava, uye iyo codeword pamusoro ndeye 15% - 20%.Kana iyo yakabuda ber = 1e-15, iyo mambure ekodha kuwana inosvika 11db, iyo inogona kutsigira kureba kwekufambisa zvinodiwa zve100g kana kunyange super 100g masisitimu.
4, Kushandiswa kweFEC uye 100g optical module
Basa reFEC rinoshandiswa mu-high-speed optical modules se 100g.Kazhinji, kana basa iri rakashandurwa, kureba kwekufambisa kwepamusoro-speed optical module ichave yakareba kudarika iyo kana FEC basa risina kuvhurwa.Semuenzaniso, 100g optical modules inogona kuwana kutapurirana kusvika ku80km.Kana basa reFEC richishandurwa, kureba kwekufambisa kuburikidza ne-single-mode optical fiber inogona kusvika kusvika ku90km.Nekudaro, nekuda kwekunonoka kusingadzivisiki kwemamwe data packet mukugadzirisa kukanganisa, kwete ese akakwira-speed optical modules anokurudzirwa kuti agone basa iri.
Nyaya iri pamusoro ndeye ''Optical module FEC function'' yaunzwa kwauri neShenzhen HDV photoelectric Technology Co., Ltd. Zvigadzirwa zvemodule zvinogadzirwa nekavha yekambani. optical fiber modules, Ethernet modules, Optical fiber transceiver modules, Optical fiber access modules, SSFP Optical modules,uyeSFP optical fibers, etc. Zvigadzirwa zvemodule zviri pamusoro zvinogona kupa rutsigiro kune akasiyana network.Nyanzvi uye yakasimba R&D timu inogona kubatsira vatengi nenyaya dzehunyanzvi, uye timu inofunga uye ine hunyanzvi bhizinesi timu inogona kubatsira vatengi kuwana masevhisi emhando yepamusoro panguva yepamberi yekubvunzana uye mushure mekugadzira basa.Tinokugamuchirai taura nesu kune chero rudzi rwekubvunza.