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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">sapi</journal-id><journal-title-group><journal-title xml:lang="ru">Системный анализ и прикладная информатика</journal-title><trans-title-group xml:lang="en"><trans-title>«System analysis and applied information science»</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2309-4923</issn><issn pub-type="epub">2414-0481</issn><publisher><publisher-name>Belarusian National Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2309-4923-2021-1-53-61</article-id><article-id custom-type="elpub" pub-id-type="custom">sapi-503</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>Обработка информации и принятие решений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Data processing and decision–making</subject></subj-group></article-categories><title-group><article-title>Метод оценки изменения частоты, основанный на оценке смещения спектральных пиков</article-title><trans-title-group xml:lang="en"><trans-title>Method of estimation of frequency variation relying on estimation of shift of spectral peaks</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>Кечик</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kechik</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кечик Даниил Александрович. магистр технических наук, аспирант кафедры информационных радиотехнологий </p><p>Минск</p></bio><bio xml:lang="en"><p>Kechik Daniil Aleksandrovich, PhD student Department of Information Radio Technologies</p><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Асламов</surname><given-names>Ю. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Aslamov</surname><given-names>Yu. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Асламов Юрий Павлович. кандидат технических наук</p><p>Минск</p></bio><bio xml:lang="en"><p>Aslamov Yuri Pavlovich. Ph D</p><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Давыдов</surname><given-names>И. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Davydov</surname><given-names>I. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Давыдов Игорь Геннадьевич. кандидат технических наук, доцент кафедры информационных радиотехнологий</p><p>Минск</p></bio><bio xml:lang="en"><p>Davydov Igor Gennadyevich. PhD, associate professor of Department of Information Radio Technologies </p><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет информатики и радиоэлектроники</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian State University of Informatics and Radioelectronics</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>26</day><month>04</month><year>2021</year></pub-date><volume>0</volume><issue>1</issue><fpage>53</fpage><lpage>61</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кечик Д.А., Асламов Ю.П., Давыдов И.Г., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Кечик Д.А., Асламов Ю.П., Давыдов И.Г.</copyright-holder><copyright-holder xml:lang="en">Kechik D.A., Aslamov Y.P., Davydov I.G.</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://sapi.bntu.by/jour/article/view/503">https://sapi.bntu.by/jour/article/view/503</self-uri><abstract><p>В различных областях обработки сигналов возникает проблема оценки изменяющейся частоты компонентов полигармонических сигналов. Для решения данной задачи традиционно используется трёхмерное частотно-временное представление сигнала. Но также необходим простой и надёжный метод слежения за мгновенной частотой сигнала. В данной работе предложен метод слежения за частотой, основанный на оценке смещения пиков спектрограммы. Предполагается, что смещение спектральных пиков компонентов сигнала пропорционально изменению базовой частоты. Логарифмическое масштабирование частотно-временного распределения используется, чтобы расположить спектральные пики на равных расстояниях по частотной оси. Временная зависимость смещения частотных пиков вычисляется при помощи корреляции спектра сигнала в первом и текущем временных окнах. Затем полученный частотный трек переводится обратно в линейный масштаб. Предложенный метод не оценивает значения мгновенной частоты или центральную частоту компонент сигнала, а оценивает изменение частоты. Преимущество методов – возможность оценивания частотного трека даже при известных грубо или неизвестных вовсе диапазоне изменения частоты или её центрального значения. Наличие множества компонентов в окне анализа не препятствует оценке изменения частоты. Рекомендуется сужение частотного диапазона для оценки изменения частоты, однако анализ частотно-временного распределения, содержащего несколько составляющих, так же возможно. Так же в работе оценивалась эффективность анализа синтезированных сигналов предложенным методом при различных отношениях сигнал-шум и прочих условиях. Методом спектральной интерференции проверялась применимость предложенного метода оценки изменения частоты для вибрационной диагностики роторного оборудования.</p></abstract><trans-abstract xml:lang="en"><p>Problem of estimation of variated frequency of components of polyharmonic signals has been arose. Three-dimensional time-frequency representation of signals is usually used to resolve this problem. But simple and reliable method of instantaneous frequency tracking is needed. Frequency tracking method based on estimation of shifts of peaks of spectrogram has been proposed in this paper. It is assumed that shift of spectral peaks of components of signal is proportional to variation of fundamental frequency. Logarithmic scaling of time-frequency representation is used to make spectral peaks equidistant. Temporal dependence of shift of spectral maximums is obtained using correlation of windowed spectrum at the first frame and spectrum of signal in the current window. Then obtained track is translated in linear scale. Proposed method does not estimate values of instantaneous frequency or central frequency of signal component but estimates its variation. Advantage of the method is that it can estimate frequency track even if range of frequency variation and its central value are known roughly or unknown at all. Multiple components do not interfere to estimate fundamental frequency variation. Reduction of bandwidth is recommended to increase accuracy of frequency track estimation, but analysis of time-frequency representation containing a few components is also possible. Dependency of performance of analysis of synthetic signals using the method on various signal to noise ratios under different conditions was estimated. Applicability of the method for vibrational diagnosing of rotary equipment was checked out using spectral interference method.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>мгновенная частота</kwd><kwd>вейвлеты</kwd><kwd>спектрограмма</kwd><kwd>корреляционная функция</kwd><kwd>слежение за частотой</kwd><kwd>оценка частоты</kwd><kwd>частота основного тона</kwd></kwd-group><kwd-group xml:lang="en"><kwd>instantaneous frequency</kwd><kwd>wavelets</kwd><kwd>spectrogram</kwd><kwd>correlation function</kwd><kwd>frequency tracking</kwd><kwd>frequency estimation</kwd><kwd>fundamental frequency</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">Barysenka, S. Y. Single-channel speech enhancement using inter-component phase relations / S. Y. Barysenka, V. I. Vorobiov, P. 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