Mu njira yolumikizirana ya digito, zomwe wolandila amalandira ndi kuchuluka kwa siginecha yotumizidwa ndi phokoso lanjira.
Kulandila koyenera kwa ma siginecha a digito kumatengera kuthekera kocheperako ngati mulingo "wabwino". Zolakwa zomwe zafotokozedwa m'mutuwu zimayambitsidwa makamaka ndi phokoso loyera la Gaussian locheperako. Pansi pamalingaliro awa, chizindikiro chosinthidwa cha digito chimagawidwa m'mitundu itatu: chizindikiro chotsimikizika, chizindikiro chodalirika ndi chizindikiro chosinthika, ndipo kuthekera kocheperako kumawunikidwa mochulukira chimodzi ndi chimodzi. Kuphatikiza apo, kuthekera kolakwika kolandila ma siginolo amagulu angapo kumawunikidwa.
Mfundo yofunikira pakuwunika ndikutenga kuchuluka kwa zitsanzo za chinthu cholandirira ngati vesi mu K-dimensional kulandira vector danga, ndikugawa malo omwe akulandila m'magawo awiri. Dziwani ngati cholakwika chachitika molingana ndi dera lomwe vesi lolandila likugwera. Chojambula cha block cha wolandila mulingo woyenera kwambiri chikhoza kupezeka ndipo kuchuluka kwa zolakwika pang'ono kumatha kuwerengedwa potengera chisankho. Kulakwitsa pang'ono kumeneku ndikwabwino kwambiri, ndiko kuti, mongoyerekeza zotheka.
Kuchuluka kolakwika kwa chizindikiro cha binary determinate kumatsimikiziridwa ndi coefficient p ndi chiŵerengero cha signal-to-noise E/n., koma alibe chiyanjano chachindunji ndi mawonekedwe a mawonekedwe. Kuchepa kwa coefficient p, kumachepetsa kuchuluka kwa zolakwika. Chizindikiro cha 2PSK chili ndi cholumikizira chaching'ono kwambiri (p=-1) komanso cholakwika chochepa kwambiri. Chizindikiro cha 2FSK chikhoza kuwonedwa ngati chizindikiro cha orthogonal chokhala ndi coefficient coefficient p=0.
Kwa chizindikiro chokhala ndi chizindikiro ndi kusinthasintha, chizindikiro cha FSK chokha chimagwiritsidwa ntchito ngati kusanthula koyimilira, chifukwa mu njira iyi, matalikidwe ndi gawo la chizindikirocho zimasinthidwa mwachisawawa chifukwa cha kukhudzidwa kwa phokoso, kotero chizindikiro cha FSK ndichofunika kwambiri kuti chigwiritsidwe ntchito. Kutsitsa kosagwirizana ndi njira yabwino yolandirira chifukwa chakusintha kwachisawawa kwa gawo lazizindikiro chifukwa cha njira.
Poyerekeza kulakwitsa pang'ono kwa wolandila weniweni ndi wolandila bwino kwambiri, zitha kuwoneka kuti ngati chiwongolero champhamvu chamagetsi ndi phokoso r mu wolandila weniweni ndi wofanana ndi chiŵerengero cha E / n cha code mphamvu ndi phokoso lamphamvu. kachulukidwe mu wolandila bwino kwambiri, kuchuluka kwa zolakwika pang'ono kwa awiriwo ndi chimodzimodzi. Komabe, chifukwa wolandila weniweni nthawi zonse sangathe kukwaniritsa mfundoyi. Choncho, ntchito ya wolandira weniweni nthawi zonse imakhala yotsika kuposa ya wolandira bwino kwambiri.
Izi ndi ShenzhenZithunzi za HDV Phoelekitironi Technology Ltd. kuti ikubweretsereni za "kulandila kwabwino kwambiri kwa ma digito", ndikuyembekeza kukuthandizani, ndi ShenzhenZithunzi za HDV Phoelekitironi Technology Ltd. kuwonjezera paONUmndandanda, transceiver mndandanda,OLTmndandanda, komanso kupanga gawo mndandanda, monga: Kulankhulana gawo kuwala, gawo kuwala kulankhulana, maukonde kuwala gawo, kulankhulana kuwala gawo, kuwala CHIKWANGWANI gawo, Efaneti kuwala CHIKWANGWANI gawo, etc., angapereke lolingana utumiki khalidwe zosowa osiyana owerenga '. , landirani kudzacheza kwanu.
