(1) Magwero a coding ndi decoding
Ntchito ziwiri zofunika: imodzi ndikuwongolera magwiridwe antchito a kufala kwa chidziwitso, ndiko kuti, kudzera muukadaulo waukadaulo wamakina aukadaulo kuyesa kuchepetsa kuchuluka kwa zizindikiro kuti muchepetse kuchuluka kwa chizindikiro. Chachiwiri ndikumaliza kutembenuka kwa analogi / digito (A / D), ndiko kuti, pamene chidziwitso chimapereka chizindikiro cha analogi, gwero la encoder limatembenuza kukhala chizindikiro cha digito kuti akwaniritse kufalitsa kwa digito kwa chizindikiro cha analogi.
(2) Kulemba tchanelo ndi kusindikiza
Ntchito: Kuwongolera zolakwika. Chizindikiro cha digito chidzakhudzidwa ndi phokoso ndi zolakwika zina pakufalitsa. Pofuna kuchepetsa zolakwika, makina osindikizira ndi chidziwitso chofalitsidwa amawonjezera zigawo zotetezera (zinthu zoyang'anira) malinga ndi malamulo ena kuti apange zomwe zimatchedwa "anti-interference coding". Chotsitsa tchanelo pamapeto olandila chimatsitsa molingana ndi malamulo osinthira kuti apeze kapena kukonza zolakwika ndikuwongolera kudalirika kwa njira yolumikizirana.
(3) Kubisa ndi kubisa
Pofuna kuonetsetsa chitetezo cha chidziwitso chofalitsidwa, ndondomeko ya digito imasokonezedwa mwachinyengo ndi kufalitsa, ndiko kuti, mawu achinsinsi akuwonjezeredwa, njirayi imatchedwa encryption. Kubwezeretsa uthenga wapachiyambi ndikutsegula.
(4) Digital modulation ndi demodulation
Kusintha kwa digito: Ma frequency amtundu wa digito baseband siginecha amasunthidwa kupita kufupi kwambiri kuti apange chizindikiro cholumikizirana chamagulu choyenera kufalitsa munjira. Pamapeto olandila, chizindikiro cha digito cha baseband chikhoza kubwezeretsedwanso ndi kutsitsa kogwirizana kapena kutsitsa kosagwirizana.
(5) Kulunzanitsa
Kulunzanitsa: Ndiko kusunga ma siginecha kumalekezero onse a kulandira ndi kulandirana motsatana ndi nthawi, ndipo ndikofunikira pakuwonetsetsa kuti njira yolumikizirana ya digito yachitika mwadongosolo, molondola komanso modalirika.
Iyi ndi Shenzhen HDV phoelectron Technology Ltd. kuti ikubweretsereni nkhani ya "communication system model", ndikuyembekeza kukuthandizani,Shenzhen HDV phoelectron Technology Ltd.ONUmndandanda, transceiver mndandanda,OLTmndandanda, komanso kupanga gawo mndandanda, monga: Communication kuwala gawo, kuwala kulankhulana gawo, maukonde kuwala gawo, kulankhulana kuwala gawo, kuwala CHIKWANGWANI gawo, Efaneti kuwala CHIKWANGWANI gawo, etc., angapereke lolingana utumiki khalidwe kwa owerenga osiyanasiyana. ' zosowa, landirani ulendo wanu.