Constellation ndi lingaliro lofunikira pakusinthika kwa digito.Tikatumiza zizindikiro za digito, nthawi zambiri sitimatumiza 0 kapena 1 mwachindunji, koma choyamba timapanga gulu la zizindikiro za 0 ndi 1 (bits) molingana ndi chimodzi kapena zingapo.Mwachitsanzo, magawo awiri aliwonse amapanga gulu, ndiko kuti, 00, 01, 10, ndi 11. Pali zigawo zinayi zonse (ngati palibe magawo atatu, pali zigawo zisanu ndi zitatu, ndi zina zotero).Pakadali pano, titha kusankha QPSK (kusintha kwa magawo anayi, molingana ndi zigawo zinayi zam'mbuyo za 00, 01, 10, ndi 11), Mfundo zinayi za QPSK zimapanga gulu la nyenyezi la QPSK.Mfundo iliyonse ndi madigiri 90 kutali ndi malo oyandikana nawo (makulitsidwe ndi ofanana).Malo a nyenyezi amafanana ndi chizindikiro chosinthira.Mwanjira imeneyi, chizindikiro chilichonse chosinthidwa chomwe chimatumizidwa ndi chidziwitso chowirikiza kawiri kuposa chomwe chimatumizidwa pang'ono.
QPSK modulation kuwundana
Chithunzi cha kuwundana kwa chizindikiro cholandilidwa
Mukalandira ndikutsitsa chizindikiro cha QPSK, weruzani kuti ndi chizindikiro chiti chomwe chimatumizidwa molingana ndi mtunda pakati pa chizindikiro cholandilidwa ndi mfundo zinayi mugulu la nyenyezi (lomwe limatchedwa mtunda waku Europe), ndikudziwitsani kuti ndi mfundo iti yomwe ili pafupi kwambiri ndi malo oti muchepetse.
Chifukwa chake, chithunzi cha kuwundana chimagwiritsidwa ntchito kwambiri popanga mapu panthawi yosinthira (monga QPSK, 16QAM, 64QAM, ndi zina zotero) komanso kudziwa kuti ndi mfundo iti yomwe imatumizidwa polandirira kuti deta iwonetsedwe moyenera.
Zomwe zili pamwambazi ndi kufotokozera kwa chidziwitso cha Tchati cha nyenyezi zomwe Shenzhen Haidiwei Optoelectronics Technology Co., Ltd.mankhwala.
