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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 ...

Pamene titumiza chizindikiro, kaya ndi chizindikiro cha kuwala, chizindikiro cha magetsi, kapena chizindikiro chopanda zingwe, ngati chikuperekedwa mwachindunji, chizindikirocho chimasokonezeka mosavuta ndi phokoso, ndipo n'zovuta kupeza chidziwitso cholondola pamapeto olandira. Pofuna kukonza luso la anti-interference ...

Njira zoyambira zakusintha kwa digito ndi: Binary amplitude keying (2ASK) -kusintha kwa matalikidwe a chizindikiro chonyamulira; Binary frequency shift keying (2FSK) -kusintha pafupipafupi kwa chizindikiro chonyamulira; Binary phase shift keying (2PSK) -kusintha kwagawo kwa chizindikiro chonyamulira. Kusintha kwagawo losiyana makiyi ...