Constellation ipfungwa yakakosha mudhijitari modulation. Patinotumira masaini edhijitari, isu kazhinji hatitumire 0 kana 1 zvakananga, asi kutanga taumba boka re 0 uye 1 masiginecha (bits) zvinoenderana neimwe kana akati wandei. Semuyenzaniso, mabhiti maviri ega ega anoumba boka, kureva, 00, 01, 10, uye 11. Kune matunhu mana muhuwandu (kana pasina zvidimbu zvitatu, kune matunhu masere, zvichingodaro). Panguva ino, tinogona kusarudza QPSK (mana-phase modulation, inoenderana nenyika ina dzakapfuura dze00, 01, 10, uye 11), Iwo mana QPSK mapoinzi anoumba QPSK nyeredzi. Imwe neimwe poindi iri 90 madhigirii kubva padyo nenzvimbo (iyo amplitude yakafanana). Nzvimbo yenyeredzi inofanana nechiratidzo chemodulation. Nenzira iyi, chiratidzo chega chega chemodulation chinotumirwa ruzivo rwakapetwa kaviri serumwe rwakatumirwa.
QPSK modulation boka renyeredzi
Dhiyagiramu yenyeredzi yechiratidzo chakagamuchirwa
Paunenge uchigamuchira nekudzikisa chiratidzo cheQPSK, tonga kuti ndechipi chiratidzo chinotumirwa zvinoenderana nenhambwe pakati pechiratidzo chakagamuchirwa uye mapoinzi mana muboka renyeredzi (rinowanzo kunzi kureba kweEurope), uye tarisa kuti ndeipi poindi iri padyo nenzvimbo yekuderedzwa.
Saka, dhiyabhorosi renyeredzi rinonyanya kushandiswa kugadzira mepu panguva yemodulation (seQPSK, 16QAM, 64QAM, nezvimwewo) uye kuona kuti ndeipi poindi inotumirwa panguva yekugamuchira kuitira kuti data rigone kuderedzwa nemazvo.
Iri pamusoro ndiyo tsananguro yeruzivo yeConstellation Chart yakaunzwa naShenzhen Haidiwei Optoelectronics Technology Co., Ltd., inova inogadzira kutaurirana kwemaziso uye inogadzira kutaurirana.zvigadzirwa.
