Ibhulogi

Ohlelweni lokuxhumana lwedijithali, lokho owamukelayo akutholayo isamba sesiginali edlulisiwe nomsindo wesiteshi. Ukwamukela okuphelele kwamasignali edijithali kusekelwe emathubeni amancane wephutha njengombandela "ongcono kakhulu". Amaphutha acatshangelwe kulesi sahluko anga...

Umfanekiso 6-6 umdwebo webhulokhi wesistimu yokudlulisa isignali ye-digital baseband evamile. Ikakhulukazi yakhiwe ngesihlungi esithumelayo (ijeneretha yesignali yesiteshi), isiteshi, isihlungi sokwamukela kanye nesinqumo samasampula. Ukuze kuqinisekiswe umsebenzi othembekile nohlelekile wohlelo, i...

Lapho umthamo wokudlulisela wesiteshi esingokoqobo uphakeme kunesidingo sesiginali eyodwa, isiteshi singabelwa amasignali amaningi, isibonelo, umugqa we-trunk wesistimu yocingo uvame ukuba nezinkulungwane zamasignali adluliswa ngefayibha eyodwa. I-Multiplexing ubuchwepheshe bokuxazulula ukuthi ...

(1) Ikhodi ye-AMI AMI(Alternative Mark Inversion) ikhodi igama eligcwele lenye ikhodi yokuguqula uphawu, umthetho wayo wombhalo wekhodi uwukuguqula ngokushintshana ikhodi yomlayezo “1″ (maka) ibe “+1″ kanye “-1″, kuyilapho "0" (uphawu olungenalutho) luhlala lungashintshiwe. Isibonelo...

Lapho sidlulisela isignali, kungakhathaliseki ukuthi isignali yokubona noma isignali kagesi noma isignali engenantambo, uma idluliswa ngokuqondile, isignali isengozini yokuphazamiseka komsindo, futhi kunzima ukuthola ulwazi olulungile ekugcineni kokwamukela. Ukuze t...

Izindlela eziyisisekelo zokuguquguquka kwedijithali kanambambili yilezi: ukhiye we-amplitude kanambambili (2ASK)- ushintsho lwe-amplitude yesiginali yenkampani yenethiwekhi; I-Binary frequency shift keying (2FSK)- ukuguqulwa kwemvamisa yesiginali yenkampani yenethiwekhi; Ukhiye wokushintsha wesigaba kanambambili (2PSK)- Ushintsho lwesigaba senkampani yenethiwekhi si...