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Calaamada badhanka dhijitaalka ah waa qaab mowjad koronto ah oo ka dhigan macluumaadka dhijitaalka ah, kaas oo lagu matali karo heerar ama garaacyo kala duwan. Waxaa jira noocyo badan oo ah calaamadaha baseband ee dhijitaalka ah (hadda kadib waxaa loo tixraacaa calaamadaha baseband). Jaantuska 6-1 waxa uu tusinayaa dhawr mawjadaha calaamada sal-band,...

Calaamadaha qirashada waxa loo qaybin karaa ishaarooyinka tamarta iyo calaamadaha tamarta sida ay u kala xoog badan yihiin. Calaamadaha korontadu waxa loo qaybin karaa calaamado xilliyeed ah iyo calaamado xilliyeedka iyadoo loo eegayo inay xilliyo yihiin iyo in kale. Calaamadaha tamarta waa ku xaddidan baaxadda iyo muddada, tamarteedu waa fi...

Marka awoodda gudbinta kanaalka jireed ay ka sarreyso baahida hal calaamad, kanaalka waxaa la wadaagi karaa calaamado badan. Tusaale ahaan, khadka jirridda ee nidaamka telifoonku waxa uu inta badan leeyahay kumanaan calaamadood oo lagu kala qaado hal fiber optic ah. Multiplexing waa tignoolajiyada xalisa...

1) Koodhka AMI Magaca buuxa ee AMI (Alternative Mark Inversion) koodka waa summada beddelka ah ee beddelka. bannaan) isma beddelin. Tusaale: Koodhka farriinta: 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… Qaabka mawjada u dhiganta AMI code waa...

Marka aynu gudbinayno signalka, hadday tahay ishaarka indhaha, haddii ay tahay signalka koronto, ama signalka wireless-ka, haddii si toos ah la isugu gudbiyo, signalka si fudud buu u dhibaa buuqa, wayna adag tahay in la helo macluumaad sax ah marka la gaadho meesha ugu dambaysa. Si loo hagaajiyo awoodda faragelinta ka hortagga...

Hababka aasaasiga ah ee habaynta dhijitaalka ah ee binary waa: furaha cabbirka laba-geesoodka ah (2ASK) - isbeddelka baaxadda ee calaamadda side; Fure-is-beddelka soo noqnoqda ee laba-geesoodka ah (2FSK) -isbeddelka soo noqnoqda ee calaamadda side; Fure-is-beddelka wajiga binary (2PSK) - isbeddelka wejiga ee calaamadda side. Isbedelka wajiga kala duwan ee muhiimka ah...