{"id":1723,"date":"2021-01-16T19:09:22","date_gmt":"2021-01-16T17:09:22","guid":{"rendered":"http:\/\/journals.khnu.km.ua\/vestnik\/?p=1723"},"modified":"2021-04-19T12:24:32","modified_gmt":"2021-04-19T09:24:32","slug":"%d1%81%d0%b8%d1%81%d1%82%d0%b5%d0%bc%d0%b0-%d0%b7%d0%b2%d1%8f%d0%b7%d0%ba%d1%83-%d0%b7-qpsk-%d0%bc%d0%be%d0%b4%d1%83%d0%bb%d1%8f%d1%86%d1%96%d1%94%d1%8e-%d1%96-%d1%81%d0%b8%d0%bd%d1%85%d1%80","status":"publish","type":"post","link":"https:\/\/journals.khnu.km.ua\/vestnik\/?p=1723","title":{"rendered":"\u0421\u0438\u0441\u0442\u0435\u043c\u0430 \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u0437 qpsk \u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0456\u0454\u044e \u0456 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u0454\u044e \u043d\u0435\u0441\u0443\u0447\u043e\u0457"},"content":{"rendered":"

\u0421\u0418\u0421\u0422\u0415\u041c\u0410 \u0417\u0412\u2019\u042f\u0417\u041a\u0423 \u0417 QPSK \u041c\u041e\u0414\u0423\u041b\u042f\u0426\u0406\u0404\u042e \u0406 \u0421\u0418\u041d\u0425\u0420\u041e\u041d\u0406\u0417\u0410\u0426\u0406\u0404\u042e \u041d\u0415\u0421\u0423\u0427\u041e\u0407<\/p>\n

COMMUNICATION SYSTEM WITH QPSK MODULATION AND CARRIER SYNCHRONIZATION<\/p>\n

<\/a> \u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438: 211-217. \u041d\u043e\u043c\u0435\u0440: \u21165, 2019 (277)<\/strong>
\n\u0410\u0432\u0442\u043e\u0440\u0438: <\/strong>
\n\u0406.\u0421. \u041f\u042f\u0422\u0406\u041d, \u0412.\u0412. \u041c\u0406\u0428\u0410\u041d, \u041e.\u041e. \u041a\u0423\u0425\u0410\u0420\u0415\u0426\u042c
\n\u0425\u043c\u0435\u043b\u044c\u043d\u0438\u0446\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442
\nI.S. PYATIN, V.V. MISHAN, O.O. KUHARETS
\nKhmelnytskyi National University<\/p>\n

DOI: https:\/\/www.doi.org\/10.31891\/2307-5732-2019-277-5-211-217<\/a>
\n\u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review :<\/strong> 25.05.2019 \u0440.
\n\u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430\/Printed :<\/strong> 23.07.2019 \u0440.<\/p>\n

\u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443<\/strong><\/p>\n

\u0414\u043b\u044f \u043f\u0456\u0434\u0432\u0438\u0449\u0435\u043d\u043d\u044f \u0435\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0456 \u0440\u043e\u0431\u043e\u0442\u0438 \u0446\u0438\u0444\u0440\u043e\u0432\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u043e\u0432\u0443\u044e\u0442\u044c \u043a\u043e\u043b\u0430 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u0457. \u0421\u0442\u0430\u0442\u0442\u044f \u043f\u0440\u0438\u0441\u0432\u044f\u0447\u0435\u043d\u0430 \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043d\u044e \u0441\u0438\u0441\u0442\u0435\u043c\u0438 \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u0437 QPSK \u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0456\u0454\u044e \u0456 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u0454\u044e \u043d\u0435\u0441\u0443\u0447\u043e\u0457. \u0424\u0430\u0437\u043e\u0432\u0430 \u043f\u043e\u043c\u0438\u043b\u043a\u0430 \u043d\u0435\u0441\u0443\u0447\u043e\u0457 \u0432\u0438\u043a\u043b\u0438\u043a\u0430\u0454 \u043f\u043e\u0432\u043e\u0440\u043e\u0442 \u0432 \u043f\u0440\u043e\u0435\u043a\u0446\u0456\u044f\u0445 \u043f\u0440\u043e\u0441\u0442\u043e\u0440\u0443 \u0441\u0438\u0433\u043d\u0430\u043b\u0443. \u041a\u043e\u043c\u043f\u0435\u043d\u0441\u0430\u0446\u0456\u044f \u0437\u0441\u0443\u0432\u0443 \u0444\u0430\u0437\u0438 \u043d\u0435\u0441\u0443\u0447\u043e\u0457 \u0432\u0438\u043a\u043e\u043d\u0443\u0454\u0442\u044c\u0441\u044f \u0448\u043b\u044f\u0445\u043e\u043c \u043e\u0431\u0435\u0440\u0442\u0430\u043d\u043d\u044f \u0432\u0438\u0445\u0456\u0434\u043d\u0438\u0445 \u0441\u0438\u0433\u043d\u0430\u043b\u0456\u0432 \u0443\u0437\u0433\u043e\u0434\u0436\u0435\u043d\u043e\u0433\u043e \u0444\u0456\u043b\u044c\u0442\u0440\u0430 \u0437\u0456 \u0437\u043d\u0438\u0436\u0435\u043d\u043e\u044e \u0447\u0430\u0441\u0442\u043e\u0442\u043e\u044e \u0434\u0438\u0441\u043a\u0440\u0435\u0442\u0438\u0437\u0430\u0446\u0456\u0457. \u0420\u043e\u0431\u043e\u0442\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0438 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u0457 \u0437\u0430\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 \u043f\u0435\u0442\u043b\u0456 \u0444\u0430\u0437\u043e\u0432\u043e\u0457 \u0430\u0432\u0442\u043e\u043f\u0456\u0434\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u0447\u0430\u0441\u0442\u043e\u0442\u0438. \u0424\u0410\u041f\u0427 \u043d\u0435\u0441\u0443\u0447\u043e\u0457 \u0444\u0430\u0437\u0438 \u0444\u043e\u0440\u043c\u0443\u0454\u0442\u044c\u0441\u044f \u0448\u043b\u044f\u0445\u043e\u043c \u0437\u0430\u043c\u043a\u043d\u0443\u0442\u043e\u0433\u043e \u043a\u043e\u043d\u0442\u0443\u0440\u0443, \u0441\u0442\u0432\u043e\u0440\u0435\u043d\u043e\u0433\u043e \u0444\u0430\u0437\u043e\u0432\u0438\u043c \u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u043e\u043c, \u043a\u043e\u043d\u0442\u0443\u0440\u043d\u0438\u043c \u0444\u0456\u043b\u044c\u0442\u0440\u043e\u043c \u0456 DDS. \u0424\u0410\u041f\u0427 \u0441\u043f\u0440\u0430\u0446\u044c\u043e\u0432\u0443\u0454, \u043a\u043e\u043b\u0438 \u0441\u0438\u0433\u043d\u0430\u043b \u043f\u043e\u043c\u0438\u043b\u043a\u0438 \u043e\u0431\u043d\u0443\u043b\u044f\u0454\u0442\u044c\u0441\u044f. \u0421\u0438\u0433\u043d\u0430\u043b \u043f\u043e\u043c\u0438\u043b\u043a\u0438 \u0433\u0435\u043d\u0435\u0440\u0443\u0454\u0442\u044c\u0441\u044f \u0431\u043b\u043e\u043a\u043e\u043c \u00ab\u041e\u0431\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044f \u0444\u0430\u0437\u043e\u0432\u043e\u0457 \u043f\u043e\u043c\u0438\u043b\u043a\u0438\u00bb \u0437 \u0432\u0438\u043a\u043e\u0440\u0438\u0441\u0442\u0430\u043d\u043d\u044f\u043c \u043f\u0440\u043e\u0435\u043a\u0446\u0456\u0439 \u0432\u0456\u0434\u043a\u043e\u0440\u0435\u0433\u043e\u0432\u0430\u043d\u043e\u0433\u043e \u043f\u0440\u043e\u0441\u0442\u043e\u0440\u0443 \u0441\u0438\u0433\u043d\u0430\u043b\u0443 \u0456 \u043e\u0446\u0456\u043d\u043e\u043a \u0441\u0438\u043c\u0432\u043e\u043b\u0456\u0432 \u0434\u0430\u043d\u0438\u0445. \u0411\u043b\u043e\u043a \u00ab\u041e\u0431\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044f \u0444\u0430\u0437\u043e\u0432\u043e\u0457 \u043f\u043e\u043c\u0438\u043b\u043a\u0438\u00bb \u0441\u043a\u043b\u0430\u0434\u0430\u0454\u0442\u044c\u0441\u044f \u0437 \u0434\u0432\u043e\u0445 \u043f\u043e\u0434\u0456\u043b\u044c\u043d\u0438\u043a\u0456\u0432, \u0434\u0432\u043e\u0445 \u0431\u043b\u043e\u043a\u0456\u0432 \u043e\u0431\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u044f \u0444\u0443\u043d\u043a\u0446\u0456\u0457 \u0430\u0440\u043a\u0442\u0430\u043d\u0433\u0435\u043d\u0441 \u0456 \u043f\u0456\u0434\u0441\u0443\u043c\u043e\u0432\u0443\u0432\u0430\u0447\u0430. 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\u0425\u043e\u0447\u0430 \u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u043d\u0430 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0430 \u043b\u0456\u043d\u0456\u0439\u043d\u0430, \u0424\u0410\u041f\u0427 \u043c\u0430\u0454 \u0444\u0430\u0437\u043e\u0432\u0443 \u043d\u0435\u0432\u0438\u0437\u043d\u0430\u0447\u0435\u043d\u0456\u0441\u0442\u044c \u03c0\/2. \u0412 \u043c\u0435\u0436\u0430\u0445 \u0441\u043c\u0443\u0433\u0438 \u0443\u0442\u0440\u0438\u043c\u0430\u043d\u043d\u044f \u0424\u0410\u041f\u0427, \u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044f EVM \u043d\u0435 \u043f\u0435\u0440\u0435\u0432\u0438\u0449\u0443\u0454 10%, \u0449\u043e \u0433\u043e\u0432\u043e\u0440\u0438\u0442\u044c \u043f\u0440\u043e \u043f\u0440\u0438\u0434\u0430\u0442\u043d\u0438\u0439 \u0440\u0456\u0432\u0435\u043d\u044c \u0441\u043f\u043e\u0442\u0432\u043e\u0440\u0435\u043d\u044c \u043a\u043e\u043d\u0441\u0442\u0435\u043b\u044f\u0446\u0456\u0439\u043d\u043e\u0457 \u0434\u0456\u0430\u0433\u0440\u0430\u043c\u0438. \u0417\u0430 \u043e\u0442\u0440\u0438\u043c\u0430\u043d\u043e\u044e \u0437\u0430\u043b\u0435\u0436\u043d\u0456\u0441\u0442\u044e \u043c\u043e\u0436\u043d\u0430 \u0437\u0440\u043e\u0431\u0438\u0442\u0438 \u0432\u0438\u0441\u043d\u043e\u0432\u043e\u043a, \u0449\u043e \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u0437\u0432\u2019\u044f\u0437\u043a\u0443 \u0437 \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u0454\u044e \u043d\u0435\u0441\u0443\u0447\u043e\u0457 \u043c\u043e\u0436\u0435 \u043f\u0440\u0430\u0446\u044e\u0432\u0430\u0442\u0438 \u0432 \u0434\u0456\u0430\u043f\u0430\u0437\u043e\u043d\u0456 \u0447\u0430\u0441\u0442\u043e\u0442 \u0432\u0456\u0434 510 \u043a\u0413\u0446 \u0434\u043e 690 \u043a\u0413\u0446 \u0437 \u043d\u043e\u043c\u0456\u043d\u0430\u043b\u044c\u043d\u0438\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044f\u043c \u043d\u0435\u0441\u0443\u0447\u043e\u0457 \u0447\u0430\u0441\u0442\u043e\u0442\u0438 600 \u043a\u0413\u0446.
\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u043b\u043e\u0432\u0430:<\/strong> \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043d\u043e \u043a\u0435\u0440\u043e\u0432\u0430\u043d\u0435 \u0440\u0430\u0434\u0456\u043e, QPSK, \u0441\u0438\u043d\u0445\u0440\u043e\u043d\u0456\u0437\u0430\u0446\u0456\u044f \u043d\u0435\u0441\u0443\u0447\u043e\u0457.<\/p>\n

\u0420\u043e\u0437\u0448\u0438\u0440\u0435\u043d\u0430 \u0430\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u0430\u043d\u0433\u043b\u0456\u0439\u0441\u044c\u043a\u043e\u044e \u043c\u043e\u0432\u043e\u044e<\/strong><\/p>\n

To increase the efficiency of digital communication systems use a carrier synchronization and symbol synchronization. The article is devoted to the study of communication systems with QPSK modulation and carrier synchronization. The carrier phase error causes a rotation in the projections of the signal space. Carrier phase shift compensation is performed by rotating the output of a matched filter with a reduced sampling rate. The synchronization system is based on a phase locked loop. The PLL of the carrier phase is formed by a closed loop created by a phase detector, a loop filter, and DDS. The PLL is triggered when the error signal is reset. The error signal is generated by the \u201cPhase error calculation\u201d block using projections of the corrected signal space and data symbol estimates. The \u201cPhase error calculation\u201d block consists of two accomplices, two blocks for calculating the arctangent function and adder. The signals at the output of these structural blocks are analysed, the PLL content band is estimated, the conclusion is made about the magnitude of the synchronization error vector magnitude on the frequency deviation. Although the detector response is linear, the PLL has a \u03c0 \/ 2 phase uncertainty. Phase ambiguity is a byproduct of removing the phase-induced landslides from the received signal. Within the PLL holding band, the EVM value does not exceed 10%, which indicates an acceptable level of distortion of the constellation diagram. Based on the obtained dependence, it can be concluded that the communication system with carrier synchronization can operate in the frequency range from 510 kHz to 690 kHz with a nominal value of the carrier frequency of 600 kHz.
\nKeywords:<\/strong> software defined radio, QPSK, carrier synchronization.<\/p>\n

References<\/strong><\/p>\n

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  3. Boiko J.M. Osoblyvosti kvazikoherentnoi obrobky syhnaliv u zasobakh telekomunikatsii z chastotnoiu manipuliatsiieiu \/ J.M. Boiko, I.S. Piatin \/\/ Telekomunikatsiini ta informatsiini tekhnolohii. \u2013 2018. \u2013 \u2116 1. \u2013 S. 107\u2013119.<\/li>\n
  4. Boiko J. M. Teoretychni aspekty pidvyshchennia zavadostiikosti y efektyvnosti obrobky syhnaliv v radiotekhnichnykh prystroiakh ta zasobakh telekomunikatsiinykh system za naiavnosti zavad [Elektronnyi resurs] : monohrafiia \/ J. M. Boiko, V. A. Druzhynin, S. V. Toliupa. \u2013 Kyiv : Lohos, 2018. \u2013 227 s. Rezhym dostupu : http:\/\/elar.khnu.km.ua\/jspui\/handle\/123456789\/6291.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    \u0421\u0418\u0421\u0422\u0415\u041c\u0410 \u0417\u0412\u2019\u042f\u0417\u041a\u0423 \u0417 QPSK \u041c\u041e\u0414\u0423\u041b\u042f\u0426\u0406\u0404\u042e \u0406 \u0421\u0418\u041d\u0425\u0420\u041e\u041d\u0406\u0417\u0410\u0426\u0406\u0404\u042e \u041d\u0415\u0421\u0423\u0427\u041e\u0407 COMMUNICATION SYSTEM WITH QPSK MODULATION AND CARRIER SYNCHRONIZATION \u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438: 211-217. \u041d\u043e\u043c\u0435\u0440: \u21165, 2019 (277) \u0410\u0432\u0442\u043e\u0440\u0438: \u0406.\u0421. \u041f\u042f\u0422\u0406\u041d, \u0412.\u0412. \u041c\u0406\u0428\u0410\u041d, \u041e.\u041e. \u041a\u0423\u0425\u0410\u0420\u0415\u0426\u042c \u0425\u043c\u0435\u043b\u044c\u043d\u0438\u0446\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442 I.S. PYATIN, V.V. MISHAN, O.O. KUHARETS Khmelnytskyi National University DOI: https:\/\/www.doi.org\/10.31891\/2307-5732-2019-277-5-211-217 \u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review : 25.05.2019 \u0440. \u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430\/Printed : 23.07.2019 \u0440. \u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1723"}],"collection":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1723"}],"version-history":[{"count":3,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1723\/revisions"}],"predecessor-version":[{"id":5903,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=\/wp\/v2\/posts\/1723\/revisions\/5903"}],"wp:attachment":[{"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/journals.khnu.km.ua\/vestnik\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}