Hamwe niterambere rya sisitemu yo gutumanaho ya optique hamwe nintera ndende, ubushobozi bunini n'umuvuduko mwinshi, cyane cyane iyo igipimo kimwe cyumuvuduko kiva kuri 40g kikagera kuri 100g cyangwa ndetse na super 100g, ikwirakwizwa rya chromatic, ingaruka zidafite umurongo, uburyo bwo gukwirakwiza polarisiyasi nizindi ngaruka zo kwanduza fibre optique izabikora bigira ingaruka zikomeye ku kurushaho kunoza igipimo cyo kohereza no kohereza.Kubwibyo, inzobere mu nganda zikomeje gukora ubushakashatsi no guteza imbere ubwoko bwa kodegisi ya FEC hamwe n’imikorere myiza kugirango ibone inyungu nyinshi za code (NCG) hamwe n’imikorere myiza yo gukosora amakosa, kugirango ihuze ibikenewe niterambere ryihuse rya sisitemu yitumanaho ryiza.
1 、 Ibisobanuro n'ihame rya FEC
FEC (ikosora ikosora imbere) nuburyo bwo kongera ubwizerwe bwitumanaho ryamakuru.Iyo ibimenyetso bya optique bihungabanye mugihe cyo kohereza, impera yakira irashobora kutamenya nabi "1 ″ ikimenyetso" 0 ″, cyangwa guca urubanza "0 ″ nk" "1 ″ ikimenyetso.Kubwibyo, imikorere ya FEC ikora kode yamakuru muri kode ifite ubushobozi bwo gukosora amakosa kuri kodegisi ya kodegisi yoherejwe, kandi umuyoboro wa decoder kumpera yakira ucamo kode yakiriwe.Niba umubare wamakosa yatanzwe mugukwirakwiza ari murwego rwubushobozi bwo gukosora amakosa (amakosa adahagarara), decoder izashakisha kandi ikosore amakosa kugirango tunoze ubwiza bwikimenyetso.
2 kinds Ubwoko bubiri bwakiriwe bwo gutunganya ibimenyetso bya FEC
FEC irashobora kugabanywamo ibyiciro bibiri: gufata ibyemezo bikomeye no gufata ibyemezo byoroshye.Icyemezo gikomeye cyo gufata ibyemezo nuburyo bwa decoding bushingiye kumyumvire gakondo yo gukosora amakosa.Demodulator yohereza ibisubizo byicyemezo kuri decoder, kandi decoder ikoresha imiterere ya algebraic ya codeword kugirango ikosore amakosa ukurikije ibisubizo byafashwe.Icyemezo cyoroshye cyo gufata ibyemezo kirimo amakuru menshi yumurongo kuruta gufata ibyemezo bikomeye.Decoder irashobora gukoresha neza aya makuru binyuze muri decoding, kugirango ibone inyungu nyinshi za code kuruta gufata ibyemezo bikomeye.
3 history Amateka yiterambere rya FEC
FEC yiboneye ibisekuru bitatu ukurikije igihe n'imikorere.Igisekuru cya mbere FEC ifata ibyemezo bikomeye byo guhagarika ibyemezo, abahagarariye bisanzwe ni RS (255239), byanditswe mubipimo bya ITU-T G.709 na ITU-T g.975, naho hejuru ya codeword ni 6.69%.Iyo ibisohoka ber = 1e-13, net net code yayo igera kuri 6dB.Igisekuru cya kabiri FEC ifata icyemezo gikomeye kode ihuriweho, kandi ikoresha byimazeyo guhuza, guhuza, gutondekanya no gukoresha ubundi buryo.Codeword hejuru iracyari 6.69%.Iyo ibisohoka ber = 1e-15, inyungu zayo za code zirenze 8dB, zishobora gushyigikira intera ndende ya sisitemu ya 10G na 40g.Igisekuru cya gatatu FEC ifata icyemezo cyoroshye, kandi codeword hejuru ni 15% - 20%.Iyo ibisohoka ber = 1e-15, net coding yunguka igera kuri 11db, ishobora gushyigikira intera ndende yohereza 100g cyangwa ndetse na super 100g sisitemu.
4 、 Gukoresha FEC na 100g optique module
Imikorere ya FEC ikoreshwa muburyo bwihuse bwa optique nka 100g.Mubisanzwe, iyo iyi mikorere ifunguye, intera yo kohereza ya module yihuta ya optique module izaba ndende kurenza iyo imikorere ya FEC idafunguye.Kurugero, 100g optique modules irashobora kugera kubutumwa bugera kuri 80km.Iyo imikorere ya FEC ifunguye, intera yoherejwe binyuze mumurongo umwe wa optique fibre irashobora kugera kuri 90km.Ariko, kubera gutinda byanze bikunze gutondekanya amakuru amwe murwego rwo gukosora amakosa, ntabwo module yihuta ya optique yose isabwa gukora iyi mikorere.
Ingingo yavuzwe haruguru ireba '' Optical module FEC imikorere '' yazanwe na Shenzhen HDV ifoto yumuriro wa tekinoroji Co., Ltd. Ibicuruzwa bya module byakozwe nigifuniko cya sosiyete moderi ya fibre optique, Ethernet, optique fibre transceiver modules, optique ya fibre optique, SSFP optique module, naSFP optique, nibindi bicuruzwa byavuzwe haruguru birashobora gutanga inkunga kubintu bitandukanye byurusobe.Itsinda ryinzobere kandi rikomeye R&D rirashobora gufasha abakiriya bafite ibibazo bya tekiniki, kandi itsinda ryubucuruzi ryatekereje kandi ryumwuga rirashobora gufasha abakiriya kubona serivise nziza mugihe cyo kubanziriza inama ndetse nakazi nyuma yumusaruro.Murakaza neza kuri twandikire kubibazo byose.