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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32446/0368-1025it.2021-5-37-46</article-id><article-id custom-type="elpub" pub-id-type="custom">izmertech-1886</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>РАДИОТЕХНИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RADIO MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Приближённые методы решения амплитудно-фазовой проблемы для непрерывных сигналов</article-title><trans-title-group xml:lang="en"><trans-title>Approximate methods of solving amplitude-phase problem for continuous signals</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6980-933X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бойков</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Boikov</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Илья Владимирович Бойков</p><p>Пенза</p></bio><bio xml:lang="en"><p>Ilia V. Boikov</p><p>Penza</p></bio><email xlink:type="simple">i.v.boykov@gmali.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зелина</surname><given-names>Я. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zelina</surname><given-names>Y. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Яна Валерьевна Зелина</p><p>Пенза</p></bio><bio xml:lang="en"><p>Yana V. Zelina</p><p>Penza</p></bio><email xlink:type="simple">zelinayana@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Пензенский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Penza State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>26</day><month>07</month><year>2023</year></pub-date><volume>0</volume><issue>5</issue><fpage>37</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/1886">https://www.izmt.ru/jour/article/view/1886</self-uri><abstract><p>Рассмотрены амплитудная и фазовая проблемы в физических исследованиях. Проанализировано построение методов и алгоритмов решения амплитудной и фазовой проблем без привлечения дополнительной информации о сигнале и его спектре. Предложены математические модели амплитудной и фазовой проблем в случае одномерных и двумерных непрерывных сигналов и найдены приближённые методы их решения. Модели основаны на использовании аппарата нелинейных сингулярных и бисингулярных интегральных уравнений. Амплитудная и фазовая задачи смоделированы соответствующими нелинейными сингулярными и бисингулярными интегральными уравнениями, определёнными на числовой оси (в одномерном случае) и на плоскости (в двумерном случае). Для решения построенных нелинейных сингулярных и бисингулярных интегральных уравнений использованы сплайн-коллокационные методы и метод механических квадратур. Системы нелинейных алгебраических уравнений, возникающие в ходе применения данных методов, решены непрерывным методом решения нелинейных операторных уравнений. На модельном примере показана эффективность предложенного метода решения фазовой проблемы в двумерном случае.</p></abstract><trans-abstract xml:lang="en"><p>Amplitude and phase problems in physical research are considered. The construction of methods and algorithms for solving phase and amplitude problems is analyzed without involving additional information about the signal and its spectrum. Mathematical models of the amplitude and phase problems in the case of one-dimensional and two-dimensional continuous signals are proposed and approximate methods for their solution are constructed. The models are based on the use of nonlinear singular and bisingular integral equations. The amplitude and phase problems are modeled by corresponding nonlinear singular and bisingular integral equations defi ned on the numerical axis (in the one-dimensional case) and on the plane (in the two-dimensional case). To solve the constructed nonlinear singular and bisingular integral equations, spline-collocation methods and the method of mechanical quadratures are used. Systems of nonlinear algebraic equations that arise during the application of these methods are solved by the continuous method of solving nonlinear operator equations. A model example shows the effectiveness of the proposed method for solving the phase problem in the two-dimensional case.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>амплитудно-фазовая проблема</kwd><kwd>непрерывные сигналы</kwd><kwd>преобразование Гильберта</kwd><kwd>нелинейные сингулярные интегральные уравнения</kwd><kwd>численные методы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>amplitude-phase problem</kwd><kwd>continuous signal</kwd><kwd>nonlinear singular integral equations</kwd><kwd>numerical methods</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Солодовников В. В. Введение в статистическую динамику систем автоматического управления. М., Л.: ГИТТЛ, 1952. 368 с.</mixed-citation><mixed-citation xml:lang="en">Solodovnikov V. 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