Kev kho qhov yuam kev Forward (FEC) yog cov txheej txheem ua cov teeb liab digital siv los txhim kho cov ntaub ntawv kev ntseeg siab. Nws ua qhov no los ntawm kev qhia cov ntaub ntawv tsis raug, hu ua yuam kev kho cov cai, ua ntej cov ntaub ntawv xa mus lossis khaws cia. FEC muab tus neeg txais lub peev xwm los kho qhov yuam kev yam tsis muaj qhov thim rov qab los thov kom rov xa cov ntaub ntawv rov qab. Raws li peb paub, qee zaum cov teeb liab kho qhov muag tuaj yeem ua rau tsis zoo vim qee yam hauv lub sijhawm sib kis, uas yuav ua rau muaj kev txiav txim siab tsis zoo ntawm tus txais qhov kawg, tej zaum ua yuam kev "1" teeb liab rau "0" teeb liab, lossis "0" signal rau "1" signal. Yog hais tias tus naj npawb ntawm qhov yuam kev hauv kev sib kis yog nyob rau hauv qhov kev kho muaj peev xwm (tsis txuas ntxiv ua yuam kev), channel decoder yuav nrhiav thiab kho qhov tsis tseeb "0" lossis "1" los txhim kho qhov zoo ntawm lub teeb liab.
Kev txhim kho ntawm Forward Error Correction hauv kev sib txuas lus kho qhov muag tuaj yeem muab faib ua peb tiam. Thawj tiam FEC sawv cev rau thawj zaug kom tau txais kev vam meej hauv submarine systems thiab hauv av. Raws li WDM systems matured, lub zog thib ob tiam FEC tau teeb tsa hauv kev lag luam. Qhov tshwm sim ntawm FEC thib peb tiam tau qhib vistas tshiab rau tiam tom ntej ntawm kev sib txuas lus kho qhov muag.
Kev thov ntawm FEC hauv100G Networks
In the context of fiber-optic networking, FEC is used to address optical SNR (OSNR) - one of the key parameters that determine how far a wavelength can travel before it needs regeneration. FEC is especially important at high-speed data rates, wherein advanced modulation schemes are required to minimize dispersion and signal correspondence with the frequency grid. Without the incorporation of FEC, 100G transport would be limited to extremely short distances. To implement long-haul transmission (>2500 km), qhov system nce yuav tsum tau txhim kho ntxiv los ntawm kwv yees li 2 dB. FEC qhov kev txhim kho los ntawm kev txiav txim siab nyuaj rau kev txiav txim siab muag ua rau qhov kev sib txawv ntawm qhov kev ua tau zoo.
Raws li kev thawb rau ib txwm-siab dua kev sib kis tau txuas ntxiv, kev txiav txim siab rau kev kho qhov yuam kev (SD-FEC) schemes tau loj hlob hauv qhov chaw. Txawm hais tias cov no tuaj yeem xav tau byte nyiaj siv ua haujlwm nyob ib puag ncig 20 feem pua - ze li peb zaug loj npaum li thawj RS coding scheme - qhov txiaj ntsig lawv tsim nyob rau hauv cov ntsiab lus ntawm kev sib txuas ceev ceev yog qhov tseem ceeb. FEC uas ua rau 1 txog 2 dB nce ntawm 100G network, piv txwv li, txhais mus rau 20 feem pua rau 40 feem pua siab dua.
Kev them nyiaj yug HTFDWDM Solutiontsim, Ib qho kev txhawb nqa 400G / 200G / 100G dwdm hloov kho. 100G QSFP28 80KM optical module muaj tus nqi zoo los pab koj txuag nqi thiab yeej ntau lub khw hauv zos. txais tos hu rau HTF. Yog xav paub ntxiv, thov, Hu rau HTF cov kws tshaj lij pab pawg muag khoom hnub no! Pab koj xaiv cov kev daws teeb meem tsim nyog thiab pab koj txuag nqi. info@htfuture.com 008618123672396
