Hauv tsab xov xwm no kuv yuav los tham txog Kev Sib Txuas Lus Tus Qauv hauv cov ntsiab lus suav nrog lawv 5 qhov chaw, (1) Qhov chaw coding thiab kev txiav txim siab, (2) Kev nkag thiab kev txiav txim siab ntawm cov channel, (3) Kev nkag mus thiab decryption, (4) Cov kev hloov pauv digital thiab demodulation, (5) Synchronization.Cia peb dhia tob…
Analog kev sib txuas lus System Model
Cov Qauv Kev Sib Txuas Lus Digital
(1) Qhov chaw coding thiab decoding:
Ob lub luag haujlwm tseem ceeb: ib qho yog txhawm rau txhim kho cov txiaj ntsig ntawm cov ntaub ntawv xa mus, uas yog, txo tus lej ntawm cov cim kom txo tus nqi ntawm cov cim los ntawm qee yam kev siv tshuab compression coding.Qhov thib ob yog ua kom tiav cov analogue / digital (A / D) hloov pauv.Ntawd yog, thaum cov ntaub ntawv qhov chaw muab cov teeb liab analogue, lub hauv paus encoder hloov nws mus rau hauv cov teeb liab digital kom paub txog cov kev sib kis ntawm cov teeb liab analogue.
(2) Encoding thiab decoding ntawm channel:
Muaj nuj nqi: Txhawm rau ua yuam kev tswj.Cov teeb liab digital tuaj yeem cuam tshuam los ntawm lub suab nrov thiab lwm yam tsis raug thaum kis.Txhawm rau txo qhov yuam kev, channel encoder thiab cov ntaub ntawv xa tawm cov cim ntxiv cov khoom tiv thaiv (cov cim saib xyuas) raws li qee txoj cai los tsim cov npe hu ua "kev cuam tshuam kev cuam tshuam."Cov channel decoder ntawm qhov kawg tau txais kev txiav txim siab raws li cov cai uas yog qhov txawv ntawm cov neeg xa khoom kawg.Nws pom qhov yuam kev lossis kho lawv, uas ua rau kev sib txuas lus zoo dua.
(3) Encryption thiab decryption:
Txhawm rau kom ntseeg tau tias kev ruaj ntseg ntawm cov ntaub ntawv xa mus, qhov kis tau tus lej digital yog sib xyaw ua ke - uas yog, tus password ntxiv.Cov txheej txheem no hu ua encryption.Restoring cov ntaub ntawv qub yog decryption.
(4) Digital modulation thiab demodulation:
Cov kev hloov pauv digital: Cov spectrum ntawm cov teeb liab digital baseband tau hloov mus rau ntau zaus los tsim cov teeb liab bandpass haum rau kev sib kis.Thaum kawg tau txais, cov teeb liab digital baseband tuaj yeem rov qab los siv ob qho tib si coherent demodulation lossis non-coherent demodulation.
(5) Synchronization:
Synchronization: Nws yog khaws cov teeb liab ntawm ob qho kawg ntawm lub transceiver synchronized nyob rau hauv lub sij hawm, thiab nws yog ib qho tsim nyog yuav tsum tau ua ntej kom muaj kev sib haum xeeb, raug, thiab txhim khu kev qha ntawm cov kev sib txuas lus digital.
Nov yog tsab xov xwm ntawm "Kev Sib Txuas Lus Tus Qauv" coj los rau koj los ntawm Shenzhen HDV phoelectron Technology Co., Ltd. vam tias tsab xov xwm no tuaj yeem pab koj kom koj paub ntau ntxiv.Dhau li ntawm tsab xov xwm no yog tias koj tab tom nrhiav rau lub tuam txhab kev sib txuas lus zoo fiber ntau cov khoom lag luam koj tuaj yeem xav txogtxog peb.
Shenzhen HDV phoelectron Technology Co., Ltd.feem ntau yog cov chaw tsim khoom ntawm cov khoom sib txuas lus.Tam sim no, cov cuab yeej tsim tawm npog lubONU series, Optical module series, OLT series, thiabtransceiver series.Peb tuaj yeem muab cov kev pabcuam customized rau cov xwm txheej sib txawv.uas tuaj yeem siv rau qhov sib txawv Muab cov kev pabcuam zoo sib xws raws li cov neeg siv khoom xav tau.Zoo siab txais tossab laj.