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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">650487</article-id><article-id pub-id-type="doi">10.31857/S0033849423080119</article-id><article-id pub-id-type="edn">ZJMCDR</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>К 100-ЛЕТИЮ Б.В. СЕСТРОРЕЦКОГО</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Algorithm for Estimating the Spectral Correlation Function Using the 2D Fast Fourier Transform</article-title><trans-title-group xml:lang="ru"><trans-title>Алгоритм оценки спектральной корреляционной функции с использованием двумерного быстрого преобразования Фурье</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shevgunov</surname><given-names>T. Ya.</given-names></name><name xml:lang="ru"><surname>Шевгунов</surname><given-names>Т. Я.</given-names></name></name-alternatives><email>shevgunov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow Aviation Institute National Research University</institution></aff><aff><institution xml:lang="ru">Московский авиационный институт (национальный исследовательский университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-08-01" publication-format="electronic"><day>01</day><month>08</month><year>2023</year></pub-date><volume>68</volume><issue>8</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>782</fpage><lpage>789</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, Т.Я. Шевгунов</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Т.Я. Шевгунов</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Т.Я. Шевгунов</copyright-holder><copyright-holder xml:lang="ru">Т.Я. Шевгунов</copyright-holder></permissions><self-uri xlink:href="https://innoscience.ru/0033-8494/article/view/650487">https://innoscience.ru/0033-8494/article/view/650487</self-uri><abstract xml:lang="en"><p>An algorithm for estimating the spectral correlation function of cyclostationary random processes on the basis of their finite-time realization is proposed. The main algorithm steps are described and the main operations performed at each of them are formalized. The presented estimates of the spectral correlation function in the presence of a correlated stationary noise overlapping the analyzed cyclostationary random process in the frequency domain confirm the efficiency of the algorithm with a low signal-to-noise ratio. The number of required computational operations and the amount of computer memory required for storing intermediate results are estimated.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181327521104">Предложен алгоритм оценивания спектральной корреляционной функции (СКФ) циклостационарных случайных процессов (ЦССП) по их реализациям конечной длительности. Описаны основные шаги алгоритма и формализованы основные операции, выполняемые на каждом из них. Представленные результаты оценивания СКФ при наличии коррелированного стационарного шума, перекрывающего анализируемый ЦССП в частотной области, подтверждают эффективность работы алгоритма в условиях низкого отношения сигнал-шум. Проведена оценка количества требуемых вычислительных операций и необходимого объема памяти ЭВМ для хранения промежуточных результатов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>spectral correlation function</kwd><kwd>cyclostationary random processes</kwd><kwd>finite-time realization</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Gardner W.A. Statistical Spectral Analysis: A Non-probabilistic Theory. Englewood Cliffs: Prentice Hall, 1988.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Gardner W.A. Cyclostationarity in Communications and Signal Processing. N.Y.: IEEE Press, 1994.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Napolitano A. Cyclostationary Processes and Time Series: Theory, Applications, and Generalizations. L.: Acad. 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