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Siginar tushe na dijital nau'in igiyar wutar lantarki ce wacce ke wakiltar bayanan dijital, wanda za'a iya wakilta ta da matakai daban-daban ko bugun jini. Akwai nau'ikan sigina na baseband na dijital da yawa (wanda ake kira siginar tushe). Hoto na 6-1 yana nuna ƴan asalin siginar siginar igiyar ruwa, ...

Ana iya raba siginonin amincewa zuwa siginonin makamashi da siginonin wuta gwargwadon ƙarfinsu. Ana iya raba siginonin wuta zuwa sigina na lokaci-lokaci da sigina na lokaci-lokaci gwargwadon ko na lokaci-lokaci ko a'a. Siginar makamashi yana da iyaka a cikin girma da tsawon lokaci, ƙarfinsa fi ...

Lokacin da ƙarfin watsa tashar ta jiki ya fi girma fiye da buƙatar sigina ɗaya, ana iya raba tashar ta sigina da yawa. Misali, layin gangar jikin tsarin tarho yawanci yana da dubban sigina da ake watsawa akan fiber na gani guda ɗaya. Multiplexing shine fasahar da ke warware ...

1) Lambar AMI Cikakken sunan lambar AMI (Alternative Mark Inversion) shine madaidaicin lambar juyar da alamar. blank) zama baya canzawa. Misali: Lambar saƙo: 0 1 1 0 0 0 0 0 0 0 1 1 0 0 1 1… AMI code: 0 -1 +1 0 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… daidai da lambar AMI shine ...

Lokacin da muke watsa sigina, ko siginar gani ne, siginar lantarki, ko siginar mara waya, idan ana watsa ta kai tsaye, siginar yana cikin sauƙi da hayaniya, kuma yana da wahala a sami ingantaccen bayani a ƙarshen karɓar. Domin inganta ikon hana tsoma baki...

Hanyoyin asali na ƙirar dijital na binary sune: Binary amplitude keying (2ASK) - girman canjin siginar mai ɗauka; Binary mitar motsi keying (2FSK) — sauyin mitar siginar mai ɗauka; Binary Phase Shift keying (2PSK) — canjin lokaci na siginar mai ɗauka. Daban-daban lokaci motsi keyin...