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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Communications Technology and Electronics</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Communications Technology and Electronics</journal-title><trans-title-group xml:lang="ru"><trans-title>Радиотехника и электроника</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0033-8494</issn><issn publication-format="electronic">3034-5901</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">650743</article-id><article-id pub-id-type="doi">10.31857/S0033849423110098</article-id><article-id pub-id-type="edn">UILOWV</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>THEORY AND METHODS OF SIGNAL PROCESSING</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ТЕОРИЯ И МЕТОДЫ ОБРАБОТКИ СИГНАЛОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Method for Calculating the Probabilities of Bit Errors in Radio Signal Reception with QPSK-Modulation in the Presence of Interference with Linear Frequency Modulation</article-title><trans-title-group xml:lang="ru"><trans-title>Методика расчета вероятностей битовых ошибок приема радиосигналов с QPSK-модуляцией при наличии помехи с линейной частотной модуляцией</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zvonarev</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Звонарев</surname><given-names>В. В.</given-names></name></name-alternatives><email>vka@mil.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>А. С.</given-names></name></name-alternatives><email>vka@mil.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Military Space Academy</institution></aff><aff><institution xml:lang="ru">Военно-космическая академия им. А.Ф. Можайского</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-11-01" publication-format="electronic"><day>01</day><month>11</month><year>2023</year></pub-date><volume>68</volume><issue>11</issue><fpage>1090</fpage><lpage>1098</lpage><history><date date-type="received" iso-8601-date="2025-01-31"><day>31</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, В.В. Звонарев, А.С. Попов</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, В.В. Звонарев, А.С. Попов</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">В.В. Звонарев, А.С. Попов</copyright-holder><copyright-holder xml:lang="ru">В.В. Звонарев, А.С. Попов</copyright-holder></permissions><self-uri xlink:href="https://innoscience.ru/0033-8494/article/view/650743">https://innoscience.ru/0033-8494/article/view/650743</self-uri><abstract xml:lang="en"><p>Based on the developed methodology for analyzing the noise immunity of receiving radio signals with quadrature phase shift keying (QPSK), the probabilities of a bit error in the presence of interference with linear frequency modulation were calculated and compared with the influence of harmonic interference. A technique is presented without calculating the probability of correct reception, using conditional transition probabilities between positions of the signal constellation, which has no restrictions on signal and interference levels.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45257551009456">На основе разработанной методики анализа помехозащищенности приема радиосигналов с квадратурной фазовой манипуляцией выполнен расчет вероятностей битовой ошибки при наличии помехи с линейной частотной модуляцией и проведено сравнение с влиянием гармонической помехи. Представлена методика без расчета вероятности правильного приема, использующая условные переходные вероятности между позициями сигнального созвездия, не имеющая ограничений в уровнях сигнала и помехи.</p></trans-abstract><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Gransart C., Romero G.L., Simon E.P. et al. // IEEE Trans. 2017. V. EC-59. № 5. 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