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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">bsuir</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады БГУИР</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady BGUIR</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1729-7648</issn><issn pub-type="epub">2708-0382</issn><publisher><publisher-name>БГУИР</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35596/1729-7648-2021-19-1-11-20</article-id><article-id custom-type="elpub" pub-id-type="custom">bsuir-2987</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, РАДИОФИЗИКА, РАДИОТЕХНИКА, ИНФОРМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ELECTRONICS, RADIOPHYSICS, RADIOENGINEERING, INFORMATICS</subject></subj-group></article-categories><title-group><article-title>Два подхода к совместному обнаружению сигналов при наличии замираний в канале связи</article-title><trans-title-group xml:lang="en"><trans-title>Two approaches to multiuser detection over fading channels</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>Тузлуков</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Tuzlukov</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тузлуков Вячеслав Петрович -  д.ф.-м.н., профессор, заведующий кафедрой технической эксплуатации авиационного и радиоэлектронного оборудования</p><p>220096, г. Минск, ул. Уборевича, 77</p></bio><bio xml:lang="en"><p>Tuzlukov Vyacheslav Petrovich -  D.Sci, Professor, Head of the Technical Maintenance of Aviation and Radio Electronic Equipment Department</p><p>220096, Minsk, Uborevich str., 77</p></bio><email xlink:type="simple">slava.tuzlukov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусская государственная академия авиации</institution></aff><aff xml:lang="en"><institution>Belarussian State Aviation Academy</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>23</day><month>02</month><year>2021</year></pub-date><volume>19</volume><issue>1</issue><fpage>11</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тузлуков В.П., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Тузлуков В.П.</copyright-holder><copyright-holder xml:lang="en">Tuzlukov V.P.</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://doklady.bsuir.by/jour/article/view/2987">https://doklady.bsuir.by/jour/article/view/2987</self-uri><abstract><p>В настоящей работе предлагаются две различные структуры приемных устройств, совместимых с технологией множественного доступа с разделением каналов при наличии антенной решетки и замираний в каналах связи. Анализируются характеристики двух различных структур коллективных обнаружителей для восходящего или нисходящего каналов связи. Число приемных антенн может быть ограничено в нисходящем канале из-за малого размера приемного устройства мобильной станции. Какие-либо специфические последовательности не рассматриваются. Предполагается синхронизированная система, но она может быть легко сведена к асинхронной системе. Первый обнаружитель использует распределенный декоррелятор, в котором декорреляция выполняется на выходе каждого элемента антенной решетки независимо, и выходы комбинируются согласно максимальному отношению сигнал/помеха. Другой обнаружитель является централизованным декоррелятором, в котором декорреляция выполняется одновременно на всех выходах элементов антенной решетки. Проводится сравнительный анализ распределенного декоррелятора, когда декорреляция сигнала выполняется каждым элементом антенной решетки, и централизованного декоррелятора, когда декорреляция выполняется совместно один раз. Использование распределенного декоррелятора позволяет получать лучшие характеристики системы при наличии гладких замираний в канале связи. Распределенный и централизованный обнаружители обеспечивают одинаковую характеристику при наличии аддитивного белого шума в канале связи. Тем не менее распределенный декоррелятор обладает лучшей характеристикой при наличии замираний в канале связи.</p></abstract><trans-abstract xml:lang="en"><p>In this paper, two different receiver structures to multiuser detection that are appropriate for the code-division multiple-access systems with antenna arrays in fading channels are investigated and compared. We analyze and compare the performance of the two different multiuser detection structures for uplink or downlink channels. The number of elements of receiving antenna array may be limited in the downlink channel due to the small size of receivers. We assume a synchronous system, but it can be easily extended to an asynchronous system. The first approach is based on the distributed decorrelator where the signal decorrelation is performed by each receiving antenna element independently and decorrelated outputs are combined according to the maximum ratio. The second approach is the central decorrelator where the signal decorrelation is performed once collectively on the outputs from all elements of receiving antenna array. Both decorrelators provide the same performance in the additive white Gaussian noise channels. The distributed decorrelator provides the better performance in flat fading channels. We employ the decorrelator to demonstrate our results. The results discussed in the present paper can be extended to other configurations such as the blind adaptive space-time multiuser detection.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>антенная решетка</kwd><kwd>множественный доступ с кодовым разделением каналов</kwd><kwd>замирания в канале связи</kwd><kwd>коллективное обнаружение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>antenna array</kwd><kwd>code-division multiple-access (CDMA)</kwd><kwd>fading channels</kwd><kwd>multiuser detection</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">Jinchen Bao, Zcheng Ma, Karagiannidis G.K. Ming Xao, Zhongliang Zhu. Joint multiuser detection of multidimensional constellation over fading channels. IEEE Transactions on Communications. 2017;65(1):504-507.</mixed-citation><mixed-citation xml:lang="en">Jinchen Bao, Zcheng Ma, Karagiannidis G.K. Ming Xao, Zhongliang Zhu. 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