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    Samaynta calaamada xiddigaha

    Waqtiga boostada: Mar-05-2022

    Zhi Zhang iyo al. oo ka socda Dugsiga Isgaadhsiinta iyo Injineerinka Warfaafinta, Jaamacadda Sayniska Elektarooniga ah iyo Tignoolajiyada ee Shiinaha ayaa nashqadeeyey qorshe dib-u-qaabayneed oo fowdo ah (CSCEn) oo leh qaybinta tirakoobka la xakameyn karo, sida ku cad FIG. 2. Ugu horreyntii, isku xigxiga calaamadda orthogonal amplitude modulation (QAM) ayaa loo qaybiyay dhowr taxane-hoosaadyo, iyo qaabaynta ixtimaalka (PS) ayaa la sameeyay iyadoo lagu salaynayo xogta tirakoobka (SI) (iyada oo loo marayo beddelka gobolka xiddigaha). Ka dib, taxanaha SI waa la deddejiyey oo lagu sireeyay wejiyada calaamadaha fowdo iyadoo la adeegsanayo algorithm qaybinta muhiimka ah. SI ayaa la soo saaray dhamaadka helitaanka si loo soo celiyo calaamadii asalka ahayd [2]. Cilmi-baadhayaashu waxay si guul leh ugu gudbiyeen calaamadda ps-16-qam sir ah oo ku saabsan fibre-gaab halbeegga ah (SSMF) oo 25km ah. Sababtoo ah nidaamkani ma xaqiijin karo oo kaliya hawlgelinta dabacsanaan leh oo leh kakan hoose iyo hagaajinta waxqabadka dirida iyo helitaanka calaamadaha, laakiin sidoo kale waxay bixiyaan ammaan ku filan oo looga hortago weerarka unugga shabakada indhaha ee sharci darrada ah (ONU), waxay shaki la'aan yeelan doontaa rajo codsi oo wanaagsan mustaqbalka.
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