Chidziwitso

Mu njira yolumikizirana ya digito, wolandila amalandira kuchuluka kwa siginecha yotumizidwa ndi phokoso lanjira. Kulandila koyenera kwa ma sigino a digito kutengera muyeso "wabwino" wokhala ndi cholakwika chochepa kwambiri. Zolakwa zomwe zafotokozedwa m'mutuwu ndi chifukwa cha kuchepa kwa band ...

Mkuyu 6-6 ndi chipika chithunzi cha mmene digito baseband chizindikiro kufala dongosolo. Imapangidwa makamaka ndi fyuluta yopatsira (chopanga chizindikiro cha tchanelo), tchanelo, zosefera zolandirira alendo, ndi chosankha chazitsanzo. Pofuna kuonetsetsa kuti ntchito yodalirika ndi yadongosolo...

Chizindikiro cha baseband cha digito ndi mawonekedwe amagetsi omwe amayimira chidziwitso cha digito, chomwe chitha kuyimiridwa ndi magawo osiyanasiyana kapena ma pulses. Pali mitundu yambiri yamasigino amtundu wa digito (omwe amatchedwanso ma sign a baseband). Chithunzi 6-1 chikuwonetsa ma waveforms ochepa a baseband, ...

Zizindikiro zovomerezeka zimatha kugawidwa muzizindikiro zamphamvu ndi zizindikiro zamphamvu molingana ndi mphamvu zawo. Zizindikiro za mphamvu zimatha kugawidwa m'magulu a periodic ndi ma aperiodic sign molingana ndi nthawi kapena ayi. Chizindikiro champhamvu chimakhala chocheperako komanso nthawi yayitali, mphamvu zake ndi ...

Pamene mphamvu yotumizira ya mayendedwe akuthupi ndipamwamba kuposa kufunikira kwa siginecha imodzi, njirayo imatha kugawidwa ndi ma sign angapo. Mwachitsanzo, thunthu la matelefoni nthawi zambiri limakhala ndi masauzande ambiri azizindikiro zomwe zimatumizidwa pamtundu umodzi wa optical fiber. Multiplexing ndiukadaulo womwe umathetsa ...

1) Khodi ya AMI Dzina lonse la code ya AMI (Alternative Mark Inversion) ndi nambala ina yosinthira chizindikiro. blank) kukhalabe osasintha. Chitsanzo: Khodi ya uthenga: 0 1 1 0 0 0 0 0 0 0 1 1 0 0 1 1… AMI kodi: 0 -1 +1 0 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… zogwirizana ndi AMI code ndi ...