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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">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-985</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>ВЗАИМОДЕЙСТВИЕ МОРСКИХ ОБЪЕКТОВ, ОКЕАНА И АТМОСФЕРЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INTERACTION OF MARINE OBJECTS*, OCEAN‏ AND ‏ATMOSPHERE</subject></subj-group></article-categories><title-group><article-title>Синтез алгоритма автоматической классификации целей на основе анализа амплитудной модуляции их шумов</article-title><trans-title-group xml:lang="en"><trans-title>The Automatic Target Recognition Algorithm Based on the Signal Modulation Analyses</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Машошин</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Mashoshin</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Saint-Petersburg</p></bio><email xlink:type="simple">aimashoshin@mail.ru</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>Шафранюк</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shafranyuk</surname><given-names>Y. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Saint-Petersburg</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ОАО «Концерн «ЦНИИ «Электроприбор»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>JSC Concern Central Scientific and Research Institute «Elektropribor»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>27</day><month>11</month><year>2022</year></pub-date><volume>7</volume><issue>4</issue><fpage>78</fpage><lpage>85</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Машошин А.И., Шафранюк Ю.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Машошин А.И., Шафранюк Ю.В.</copyright-holder><copyright-holder xml:lang="en">Mashoshin A.I., Shafranyuk Y.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://hydrophysics.spbrc.ru/jour/article/view/985">https://hydrophysics.spbrc.ru/jour/article/view/985</self-uri><abstract><p>Амплитудная модуляция подводного шумоизлучения морских судов широко используется на практике для их классификации. На основе анализа параметров амплитудной модуляции могут быть определены: тип судна; его водоизмещение; тип движителя; количество гребных валов; количество лопастей гребного винта; скорость хода; факт изменения курса либо скорости судна. Подводные шумы морских судов подвержены двум видам модуляции: вально-лопастной модуляции; обусловленной кавитацией; возникающей на гребном винте при его вращении на сверхкритической скорости; что характерно для быстродвижущихся объектов (надводных кораблей и судов; торпед); и модуляции качкой; обусловленной качкой судна на волнении и; как следствие; периодическим изменением погруженной в воду части судна. В работе приводится синтез оптимального (по критерию максимального правдоподобия) алгоритма классификации морских объектов на основе анализа амплитудной огибающей их шумов. Показано; что синтезированный алгоритм может применяться как индивидуально; так и в составе комплексного алгоритма; осуществляющего классификацию целей на основе совокупности классификационных признаков. Исследована эффективность синтезированного алгоритма в зависимости от отношения сигнал/помеха в полосе додетекторного фильтра; а также от параметров устройства обнаружения амплитудной модуляции.</p></abstract><trans-abstract xml:lang="en"><p>Amplitude modulation of the sea vessel noise is widely used for automatic target recognition. Using the amplitude modulation parameters one can determine the vessel type; her displacement; the number of shafts and propeller blades; the velocity; the moment of course or velocity changing. There are two types of amplitude modulation: shaft and blade modulation due to the cavitations on the blade at large speed of rotation and roll and pitch modulation due to periodical changing of submerged part of the vessel. The paper contains the syntheses of optimal maximum likelihood automatic target recognition algorithm on base of amplitude modulation of their signals. It is shown that the same algorithm can be used both individually and as a part of the complex algorithm using several signal parameters. The effectiveness of automatic target recognition algorithm is investigated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>классификация подводного объекта</kwd><kwd>амплитудная огибающая шума</kwd><kwd>дискретная составляющая спектра</kwd><kwd>синтез оптимального алгоритма классификации</kwd></kwd-group><kwd-group xml:lang="en"><kwd>automatic target recognition</kwd><kwd>signal amplitude envelope</kwd><kwd>discrete component of the spectra</kwd><kwd>syntheses of optimal maximum likelihood automatic target recognition algorithm</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">Tuteur F. B. Detection of wide-band signals modulated by a low-frequency sinusoid // Processing of Data from Sonar Systems / Ed. by R. A. MacDonald et al. Appendix A-4; Yale University; New Haven; Conn; USA. 1963. AD-420575.</mixed-citation><mixed-citation xml:lang="en">Tuteur F. B. 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