M'nkhaniyi ndikamba za Communication System Model mwatsatanetsatane ndikuphatikiza magawo awo a 5, (1) Coding source ndi decoding, (2) Encoding and decoding of channels, (3) Encryption and decryption, (4) Digital modulation and kutsitsa, (5) Kulunzanitsa.Tiyeni tidziŵe mwakuya…
Analogi Communication System Model
Digital Communication System Model
(1) Magwero ma code ndi decoding:
Ziwiri zofunika ntchito: mmodzi ndi kusintha mphamvu ya kufala zambiri, ndiko kuti, kuchepetsa chiwerengero cha zizindikiro kuchepetsa mlingo wa zizindikiro kudzera zina psinjika khodi luso.Chachiwiri ndikumaliza kutembenuka kwa analogi/digital (A/D).Ndiko kuti, pomwe gwero lazidziwitso likupereka chizindikiro cha analogue, chosungira gwerocho chimachisintha kukhala chizindikiro cha digito kuti chizindikire kutumizira kwa digito kwa siginecha ya analogi.
(2) Encoding and decoding of channels:
Ntchito: Kuwongolera zolakwika.Zizindikiro za digito zitha kukhudzidwa ndi phokoso ndi zolakwika zina pakutumiza.Pofuna kuchepetsa zolakwika, makina osindikizira ndi zizindikiro zotumizira mauthenga amawonjezera zigawo zotetezera (zizindikiro zoyang'anira) malinga ndi malamulo ena kuti apange zomwe zimatchedwa "anti-interference coding".Decoder ya tchanelo pamapeto olandila imatsitsidwa kutengera malamulo omwe ali otsutsana ndi omwe ali kumapeto kwa kutumiza.Imapeza zolakwika kapena kukonza, zomwe zimapangitsa kuti njira yolumikizirana ikhale yodalirika.
(3) Kubisa ndi kubisa:
Pofuna kuonetsetsa chitetezo cha chidziwitso chofalitsidwa, ndondomeko yofalitsidwa ya digito imapangidwa mwachinyengo-ndiko kuti, mawu achinsinsi amawonjezeredwa.Njirayi imatchedwa kubisa.Kubwezeretsanso zachidziwitso choyambirira ndikumasulira.
(4) Kusintha kwa digito ndi kutsitsa:
Kusintha kwa digito: Sipekitiramu ya siginecha ya digito ya baseband imasinthidwa kupita ku ma frequency apamwamba kuti apange chizindikiro cha bandpass yoyenera kutumizira tchanelo.Pamapeto olandirira, chizindikiro cha digito cha baseband chikhoza kubwezeretsedwanso pogwiritsa ntchito kusokoneza kogwirizana kapena kusokoneza kosagwirizana.
(5) Kulunzanitsa:
Kulunzanitsa: Ndiko kusunga zizindikiro pamapeto onse a transceiver zogwirizana ndi nthawi, ndipo ndizofunikira kuti zitsimikizidwe kuti zikugwira ntchito mwadongosolo, molondola, komanso lodalirika la njira yolankhulirana ya digito.
Iyi ndi nkhani ya "Communication System Model" yobweretsedwa kwa inu ndi Shenzhen HDV phoelectron Technology Co., Ltd. ndikuyembekeza kuti nkhaniyi ingakuthandizeni kuonjezera chidziwitso chanu.Kupatula nkhaniyi ngati mukuyang'ana kampani yabwino yopanga zida zoyankhulirana zama fiber zomwe mungaganizirezambiri zaife.
Malingaliro a kampani Shenzhen HDV phoelectron Technology Co., Ltd.makamaka amapanga zinthu zoyankhulirana.Pakadali pano, zida zomwe zimapangidwa zimakwiriraZithunzi za ONU, Optical module mndandanda, Zithunzi za OLT,nditransceiver mndandanda.Titha kupereka ntchito makonda pazochitika zosiyanasiyana.zomwe zingagwiritsidwe ntchito zosiyanasiyana Perekani ntchito yofananira yapamwamba malinga ndi zosowa za ogwiritsa ntchito.Mwalandiridwafunsani.