Labarai

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...

Tsarin PON yana ɗaukar fasahar rarraba lokaci-lokaci a cikin hanyar haɗin kai, kuma ONU tana aika bayanai zuwa alkiblar haɗin kai bisa ga tambarin lokaci da OLT ya keɓe. Lokacin da ONU ya fitar da haske ba tare da sanya tambarin lokaci ba, zai ci karo da siginar fitar da wasu akan...

Tare da haɓaka tsarin sadarwa na gani tare da nisa mai tsayi, ƙarfin da ya fi girma, da kuma mafi girman gudu, musamman lokacin da adadin igiyar ruwa guda ɗaya ya samo asali daga 40g zuwa 100g ko ma super 100g, watsawar chromatic, tasirin da ba na layi ba, watsawar yanayin polarization, da sauran tasirin watsawa a ciki. ..