Mkuyu 6-6 ndi chipika chithunzi cha mmene digito baseband chizindikiro kufala dongosolo. Amapangidwa makamaka ndi fyuluta yotumizira (chopanga chizindikiro cha tchanelo), tchanelo, zosefera zolandirira alendo, ndi chosankha chazitsanzo. Pofuna kuonetsetsa kuti dongosololi likugwira ntchito modalirika komanso mwadongosolo, payeneranso kukhala njira yolumikizirana.
Ntchito za chipika chilichonse pachithunzichi komanso momwe zimakhalira potumiza ma siginecha zikufotokozedwa mwachidule motere:
(1) Chizindikiro choyambirira cha njira (sefa yotumizira). Ntchito yake ndikupanga baseband sign waveform yoyenera kufalitsa mayendedwe. Chifukwa cholowera chake nthawi zambiri chimakhala khodi yotumizira yomwe imapangidwa ndi encoder yamtundu wa code, mawonekedwe ofananirako oyambira nthawi zambiri amakhala amtundu wa rectangular pulse, ndipo mawonekedwe ake ndi otakata kwambiri, omwe sangathandize kufalitsa. Zosefera zotumizira zimagwiritsidwa ntchito kupondereza bandi yolowera ndikusintha ma code transmission kukhala baseband sign waveform yoyenera kufalitsa njira.
(2) Channel. Ndi sing'anga yomwe imalola kuti ma sign a baseband adutse, nthawi zambiri njira yolumikizira mawaya, monga chingwe chopotoka, chingwe cha coaxial, ndi zina zambiri. kupotozedwa. Kuphatikiza apo, phokoso n (T) limalowetsedwa mumsewu, ndipo amalingaliridwa kuti ndi phokoso loyera la Gaussian lomwe lili ndi tanthauzo la zero.
(3) Fyuluta yolandirira alendo Imagwiritsidwa ntchito polandila ma siginecha, kusefa phokoso lanjira ndi zosokoneza zina momwe ndingathere, kufananiza mawonekedwe a tchanelo, ndikupanga mawonekedwe a baseband kuti agwirizane ndi zisankho.
(4) Chosankha zitsanzo. Ndikuyesa ndikuzindikira mawonekedwe amtundu wa fyuluta yolandiriratu panthawi yodziwikiratu (yoyendetsedwa ndi kugunda kwanthawi pang'ono) kuti mubwezerenso kapena kutulutsanso chizindikiro cha baseband pansi pamayendedwe osagwira ntchito komanso phokoso.
(5) Kuthamanga kwa nthawi ndi kusinthasintha kwanthawi kochepa komwe kumagwiritsidwa ntchito poyesa zitsanzo kumachotsedwa ku siginecha yomwe idalandilidwa ndi gawo lochotsamo. Kulondola kwa nthawi yocheperako kumakhudza mwachindunji zotsatira za chisankho.
Izi ndizomwe zimapangidwira makina otumizira ma sigino a digito baseband obweretsedwa ndi Shenzhen HDV Phoelectron Technology Co., Ltd. kwa inu. Ndikukhulupirira kuti nkhaniyi ikuthandizani kuti muwonjezere chidziwitso chanu. Kupatula nkhaniyi ngati mukuyang'ana kampani yabwino yopanga zida zoyankhulirana zama fiber zomwe mungaganizirezambiri zaife.
Shenzhen HDV photoelectric Technology Co., Ltd. ndiyomwe imapanga zinthu zolumikizirana. Pakadali pano, zida zomwe zimapangidwa zimakwiriraZithunzi za ONU, Optical module mndandanda, Zithunzi za OLT,nditransceiver mndandanda. Titha kupereka ntchito makonda pazochitika zosiyanasiyana. Mwalandiridwafunsani.
