Nekuvandudzwa kwemaoptic 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 mafambisirwo ekutapurirana mumaziso. fiber ichakanganisa zvakanyanya kuwedzeredzwa kweyero yekufambisa uye kureba kwekutapurirana.Naizvozvo, nyanzvi dzeindasitiri dzinoramba dzichitsvaga nekugadzira FEC kodhi mhando nekuita zvirinani kuti vawane yakakwirira net coding gain (NCG) uye zvirinani kugadzirisa kukanganisa kuita, kuzadzisa zvinodiwa 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 yekudhirodha 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 nemukana wekudhikodha kuitira kuti uwane yakakura coding pfuma pane yakaoma sarudzo decoding.
3, Nhoroondo yekuvandudza yeFEC
FEC yakasangana nezvizvarwa zvitatu maererano nenguva nekuita.Chizvarwa chekutanga FEC inotora yakaomesesa sarudzo block code.Mumiririri anowanzo RS (255239), iyo yakanyorwa muITU-T G.709 uye ITU-T g.975 mitemo, uye codeword pamusoro pe6.69%.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 kana basa reFEC risina kuvhurwa.Semuenzaniso, 100g optical modules inogona kuwana kutapurirana kusvika ku80km.Kana basa reFEC richivhurwa, kureba kwekufambisa kuburikidza ne-single-mode optical fiber inogona kusvika kusvika ku90 km.Nekudaro, nekuda kwekunonoka kusingadzivisiki kwemamwe data packet mukugadzirisa kukanganisa, kwete ese akakwira-speed optical modules anokurudzirwa kuti agone basa iri.
Shenzhen HDV photoelectric Technology Co., Ltd.Zvigadzirwa zvekukurukurirana zvinogadzirwa nekambani zvinovhara;
Zvikamu zvemodule:optical fiber modules, Ethernet modules, Optical fiber transceiver modules, Optical fiber access modules, SSFP Optical modules,uyeSFP optical fibers, nezvimwewo.
ONU chikamu:EPON ONU, AC ONU, Optical fiber ONU, CATV ONU, GPON ONU, XPON ONU, nezvimwewo.
OLT kirasi:kuchinja OLT, GPON OLT, EPON OLT, kutaurirana OLT, nezvimwewo.
Izvo zviri pamusoro module zvigadzirwa zvinogona kupa rutsigiro kune akasiyana network mamiriro.Nyanzvi uye yakasimba R&D timu inogona kubatsira vatengi nenyaya dzehunyanzvi, uye timu inofunga uye ine hunyanzvi bhizinesi inogona kubatsira vatengi kuwana masevhisi emhando yepamusoro panguva yepamberi yekubvunzana uye mushure mekugadzira basa.Tinokugamuchiraitaura nesukune chero rudzi rwekubvunza.
