Njira zoyambira zamasinthidwe a digito ndi: binary amplitude keying (2ASK) - kusintha kwa matalikidwe a chizindikiro chonyamulira; Binary frequency shift keying (2FSK) - kusintha kwafupipafupi kwa chizindikiro chonyamulira; Binary phase shift keying (2PSK)- Kusintha kwa gawo la chizindikiro chonyamulira. Chifukwa cha kusatsimikizika kwa gawo mu dongosolo la 2PSK, kusiyana kwa gawo-shift keying 2DPSK kumapangidwa.
Bandwidth yomwe imafunidwa ndi 2ASK ndi 2PSK ndiwiri kuchuluka kwa code. 2FSK imafuna bandiwifi yapamwamba kuposa 2ASK ndi 2PSK.
Kulakwitsa pang'ono kwamakina osiyanasiyana osinthira digito kumatengera chiŵerengero cha ma sign to noise ratio (SNR) ya demodulator. Pankhani ya anti-additive white Gaussian phokoso, 2PSK yogwirizana ili ndi ntchito yabwino, yotsatiridwa ndi 2FSK, ndipo 2ASK ili ndi ntchito yoipa kwambiri.
ASK ndi imodzi mwa njira zoyambirira zosinthira mawu. Ubwino wake ndi zida zosavuta komanso kugwiritsa ntchito pafupipafupi band; Choyipa ndichakuti machitidwe odana ndi phokoso ndiwosauka, ndipo amakhudzidwa ndi kusintha kwa kanjira.tics, ndipo sikophweka kupanga chowunikira zisankho kuti chizigwira ntchito bwino kwambiri.
FSK ndi njira yofunikira kwambiri yosinthira kulumikizana kwa digito. Ubwino wake ndikuti uli ndi mphamvu zotsutsana ndi zosokoneza ndipo sizimakhudzidwa ndi kusintha kwa magawo a njira, kotero FSK ndiyoyenera makamaka pamayendedwe akutha. Choyipa ndichakuti gulu la ma frequency omwe amakhala ndi ambiri, makamaka MF-SK, ndipo ma frequency band magwiritsidwe ndi otsika. Pakali pano, kachitidwe ka frequency modulation imagwiritsidwa ntchito kwambiri pamayendedwe apakatikati komanso otsika kwambiri.
PSK kapena DPSK ndi njira yosinthira yomwe imakhala yothamanga kwambiri, mphamvu zake zotsutsana ndi phokoso zimakhala zamphamvu kuposa ASK ndi FSK, ndipo sizimakhudzidwa mosavuta ndi kusintha kwa mawonekedwe a njira, choncho yakhala ikugwiritsidwa ntchito kwambiri pofalitsa deta yothamanga kwambiri komanso yapakati. . Absolute Phase shift (PSK) ili ndi vuto la kusadziwika kwa gawo lonyamulira pakuwongolera kogwirizana, kotero sikumagwiritsidwa ntchito kawirikawiri pakufalitsa mwachindunji. MDPSK imagwiritsidwa ntchito kwambiri.
Pamwambapa ndi nkhani yakuti "Binary digital modulation" yobweretsedwa ndi Shenzhen HDV Phoelectron Technology Co., LTD. Ndi wopanga okhazikika pazida zoyankhulirana monga zinthu zazikulu, mongaONUmndandanda mankhwala:OLT ONU, ACONU, KulankhulanaONU, kuwala kwa fiberONU, CATVONU, GPONONU, XPONONU, etc., zipangizo pamwamba angagwiritsidwe ntchito zosiyanasiyana moyo, ndi lolinganaONUmankhwala angapo akhoza makonda malinga ndi zosowa zawo. Kampani yathu imatha kupereka chithandizo chaukadaulo komanso chapamwamba kwambiri. Ndikuyembekezera ulendo wanu.
