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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">tuzsut</journal-id><journal-title-group><journal-title xml:lang="ru">Труды учебных заведений связи</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of Telecommunication Universities</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1813-324X</issn><issn pub-type="epub">2712-8830</issn><publisher><publisher-name>СПбГУТ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31854/1813-324X-2022-8-4-21-27</article-id><article-id custom-type="elpub" pub-id-type="custom">tuzsut-412</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>ЭЛЕКТРОНИКА, ФОТОНИКА, ПРИБОРОСТРОЕНИЕ И СВЯЗЬ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTRONICS, PHOTONICS, INSTRUMENTATION AND COMMUNICATIONS</subject></subj-group></article-categories><title-group><article-title>Реализация алгоритма начальной синхронизации демодулятора сигналов с прямым расширением спектра на основе быстрого преобразования Фурье. Часть 1. Постановка задачи и подход к решению</article-title><trans-title-group xml:lang="en"><trans-title>Direct Sequence Spread Spectrum Signal’s Demodulator Acquisition Implementation Based on Fast Fourier Transform. Part 1. Problem Statement and Solution Approach</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6742-2705</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брусин</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Brusin</surname><given-names>E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ефим Александрович Брусин, кандидат технических наук, руководитель проектного направления; доцент кафедры электроники и схемотехники </p><p>Санкт-Петербург, 192012;Санкт-Петербург, 193232</p></bio><bio xml:lang="en"><p>Efim Brusin</p><p>St. Petersburg, 192012;</p><p>St. Petersburg, 193232</p></bio><email xlink:type="simple">yefim07@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">АО «Российский институт радионавигации и времени»; Санкт-Петербургский государственный университет телекоммуникаций им. М.А. Бонч-Бруевича<country>Россия</country></aff><aff xml:lang="en">Russian Institute of Radionavigation and Time; The Bonch-Bruevich Saint-Petersburg State University of Telecommunications<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>10</day><month>01</month><year>2023</year></pub-date><volume>8</volume><issue>4</issue><fpage>21</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Брусин Е.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Брусин Е.А.</copyright-holder><copyright-holder xml:lang="en">Brusin E.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://tuzs.sut.ru/jour/article/view/412">https://tuzs.sut.ru/jour/article/view/412</self-uri><abstract><p>Работа посвящена проблеме начальной синхронизации демодуляторов сигналов с прямым расширением спектра (Direct Spread Spectrum Signals). Как правило, для каналов связи, в которых используются указанные сигналы, характерны значительные сдвиги по задержке и значительные изменения несущей частоты. Поэтому данная проблема является наиболее существенной при построении аппаратуры приема. В работе предлагаются подход к реализации алгоритма начальной синхронизации на основе использования методов быстрого преобразования Фурье и обсуждаются результаты моделирования предложенного алгоритма. </p></abstract><trans-abstract xml:lang="en"><p>The article is dedicated to direct sequence spread spectrum signals acquisition. Communication channels that use direct sequence spread spectrum signals are characterized by significant delay and carrier frequency shift as a rule. That’s why the acquisition is most significant problem in receive equipment design. Suggested approach to acquisition problem base on the Fast Fourier Transform and discussed modeling suggested algorithm’s results.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>прямое расширение спектра</kwd><kwd>начальная синхронизация</kwd><kwd>быстрое преобразование Фурье</kwd></kwd-group><kwd-group xml:lang="en"><kwd>direct sequence spread spectrum signals</kwd><kwd>acquisition</kwd><kwd>Fast Fourier Transform</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">Ipatov V.P. Spread Spectrum and CDMA. Principles and Applications. John Wiley &amp; Sons, 2005.</mixed-citation><mixed-citation xml:lang="en">Ipatov V.P. Spread Spectrum and CDMA. Principles and Applications. John Wiley &amp; Sons; 2005.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Almeida A.P., Dinis R., Cercas F.B. 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