Taw qhia rau Pam4 thev naus laus zis

Ua ntej nkag siab Pam4 thev naus laus zis, dab tsi yog cov thev naus laus zis? Kev siv thev naus laus zis yog cov txheej txheem ntawm kev hloov cov ntsiab lus ntawm cov paib (cov paib hluav taws xob nqus) mus rau cov paib sib kis. Txhawm rau kom muaj kev sib txuas lus sib txuas lus thiab kov yeej cov teeb meem hauv kev ncua ntev ntev

Pam4 yog qhov kev txiav txim plaub pulite kev hloov kho (PAM) cov txheej txheem kev sib txawv.

Pam teeb meem yog cov cim kev sib kis tau nrov tshaj plaws tom qab nrz (tsis rov qab mus rau xoom).

Lub cim NRZ siv ob qib teeb liab, siab thiab qis, los sawv cev rau 1 thiab 0 ntawm lub cim cav

Pam4 teeb cim siv cov cim kev sib txawv rau cov phiajcim sib txawv, thiab txhua lub moos lub voj voog tuaj yeem xa tawm 2 cov ntaub ntawv ntawm cov ntaub ntawv sau tseg, yog 00, 01, 10, thiab 11.
Yog li ntawd, nyob rau hauv tib tus nqi baud tib yam, tus nqi ntawm Pam4 yog ob zaug ntawm NRZ teeb liab, uas tau muab cov nqi sib kis tau zoo thiab txo cov nqi.

Pam4 Technology tau tau siv dav hauv kev ua si ntawm cov teeb liab kev sib txuas lus siab. Tam sim no, muaj 400g optical transceiver module raws li PAM4 kev kho kho tshiab rau cov ntaub ntawv chaw thiab 50G Optical Transceolation module raws li PAM4 kev siv tshuab rau 5G interconnection network rau 5G interconpection network rau 5G interconpection network rau 5G interconection network.

Cov txheej txheem siv ntawm 400g DML kho qhov muag Transce, PAM4 Modulation yog raws li hauv qab no: thaum xa khoom siv hluav taws xob ntawm 25 Lub teeb hluav taws xob siab tshaj plaws tau hloov dua tshiab rau hauv 8 teev ntawm lub wavelength optical cov cim los ntawm 8 channel ntawm 400g high-ceev kho qhov ntsuas teeb liab. Thaum tau txais cov cim teev tseg, tau txais 1-channel 400g High-spectse optical lub teeb liab los ntawm kev kho kho kho qhov muag, tau txais los ntawm cov khoom siv kho qhov muag, thiab hloov pauv mus rau hauv lub cim hluav taws xob. Tom qab moos rov qab, kev ua kom zoo, thiab pamn4 demodulation los ntawm cov cim hluav taws xob los ntawm cov hluav taws xob ua los ntawm 16 tshooj ntawm 25G NRZ Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob.

Siv cov cuab yeej siv PAM4 kev siv tshuab rau 400GB / s kho qhov muag. Lub 400GB / S Optical module Raws li Pam cov kev tsim nyog tuaj yeem txo tus neeg tau txais kev hloov pauv ntawm qhov tau txais qhov ntau dua rau NRZ. Pam4 kev daws teeb meem ntawm cov khoom siv kho qhov muag hauv lub cev kho kho kho qhov muag, uas tuaj yeem nqa cov nqi sib dhos qis dua, txo qis zog hauv kev noj, thiab ntim me me.

Muaj qhov thov rau 50gbit / s kho qhov muag tau kis hauv 5GAm cov khoom siv thiab ntxiv los ntawm kev ua haujlwm kho qhov muag thiab txhawb nqa kom ua tiav kom ua tiav cov nqi qis thiab bandwidth siab.

Thaum piav txog PAM-4 cov phiajcim, nws yog ib qho tseem ceeb kom them sai sai rau qhov sib txawv ntawm baud tus nqi thiab tus nqi me me. Rau cov tsoos NRZ cov cim, txij li ib lub cim kis ib qho ntawm cov ntaub ntawv, tus nqi me me thiab tus nqi baud yog tib yam. Piv txwv li, hauv 100g ethernet, siv plaub 25.78125Gbaud cov cim rau kev sib kis, thiab plaub cim npe ua tiav 100GBs cov cim qhia ntawv; Rau PAM-4 cov phiajcim, txij li ib lub cim xa mus 2 khoom ntawm cov ntaub ntawv, tus nqi me me uas tuaj yeem kis tau yog ob zaug ntawm tus nqi baud. Piv txwv li, siv 4 channel ntawm 26.5625Gbaud Cov cim rau kev sib kis hauv 2003.125Gbps, thiab 4 Raws cov cim tuaj yeem ua tiav 200GBPS cov cim kev kis tau. Rau 400g ethernet, nws tuaj yeem ua tiav nrog 8 channel ntawm 26.5625Gbaud cov cim.