Mfundo Yofunika:Mfundo ya Direct Sequence Spread Spectrum system ndiyosavuta. Mwachitsanzo, zidziwitso zambiri zomwe ziyenera kutumizidwa zimakulitsidwa mpaka gulu lalikulu kwambiri kudzera pa PN code. Pamapeto olandila, chidziwitso chomwe chimatumizidwa chimabwezedwa mwa kugwirizanitsa chizindikiro cha sipekitiramu yofalikira ndi nambala yofanana ya PN yomwe imagwiritsidwa ntchito pakukulitsa kumapeto kwa kutumiza.
Mfundo yakuzama:Choyamba, imagwiritsa ntchito mwachindunji kufalikira kwa ma code spectrum omwe ali ndi kuchuluka kwa code kuti afalitse mawonekedwe a sipekitiramu pa transmitter pogwiritsa ntchito njira zosiyanasiyana zosinthira, ndiyeno imagwiritsa ntchito njira yofananira yofananira yofananira kuti ifotokozere wolandila kuti abwezeretse kufalikira. chizindikiro cha sipekitiramu ku chidziwitso choyambirira. Momwe mungafalitsire sipekitiramu mwachindunji: M'malo mwake, njira yosinthira digito imagwiritsidwa ntchito. Makamaka, PN code ina (pseudo-noise code) imagwiritsidwa ntchito kuwonjezera gwero lazizindikiro. Mwachitsanzo, chowulutsira chikafunika kutumiza ma signature, sinthani "1" ndi 110001000110 ndi "0" ndi 00110010110. Njirayi imazindikira mawonekedwe osiyanasiyana. Pa wolandila, ngati mndandanda womwe walandilidwa ndi 110001001110, udzabwezeretsedwa ku "1" ndipo ngati ndi "00110010110," udzabwezeretsedwa ku "0". Izi zimatchedwa “mkate. Mwanjira iyi, kuchuluka kwa magwero azizindikiro kumachulukitsidwa ndi nthawi 11, ndipo phindu lokonzekera limaposa 10dB, zomwe zimapangitsa kuti phokoso lamitundu yonse likhale labwino.
Ma bandwidth a RF a dongosolo la DSSS ndiwamba kwambiri. Chifukwa chake, gawo laling'ono la sipekitiramu silingayambitse kuwonongeka kwakukulu kwa sipekitiramu yamagetsi, yomwe ndi imodzi mwazabwino zake. DSSS ndiyabwino kwambiri pachitetezo chake, ndichifukwa chake asitikali aku US adagwiritsa ntchito kwambiri potumiza opanda zingwe pa Nkhondo Yachiwiri Yapadziko Lonse.
Zomwe zili pamwambazi ndi kufotokozera kwa chidziwitso cha Direct Sequence Spread Spectrum (DSSS) Communication - Mfundo Yolumikizirana yobweretsedwa kwa inu ndiMalingaliro a kampani Shenzhen HDV Optoelectronic Technology Co., Ltd., wopanga zida zolumikizirana ndi kuwala. ndikukhulupirira kuti nkhaniyi ingakuthandizeni kukulitsa chidziwitso chanu. Zikomo powerenga nkhaniyi.