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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-2024-10-2-7-14</article-id><article-id custom-type="edn" pub-id-type="custom">UIVIZN</article-id><article-id custom-type="elpub" pub-id-type="custom">tuzsut-564</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>КОМПЬЮТЕРНЫЕ НАУКИ И ИНФОРМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COMPUTER SCIENCE AND INFORMATICS</subject></subj-group></article-categories><title-group><article-title>Численное моделирование прекодирования ZF и оптимального прекодирования в канале MU-MISO при задержках информации о канале</article-title><trans-title-group xml:lang="en"><trans-title>Numtrical Evaluation of Optimal Precoding Algorithm and Zero Forcing Precoding in  MU-MISO Channel with Channel Aging</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1235-6314</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калачиков</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalachikov</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры радиотехнических систем </p></bio><email xlink:type="simple">330rts@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Сибирский государственный университет телекоммуникаций и информатики<country>Россия</country></aff><aff xml:lang="en">Siberian State University of Telecommunications and Information Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>26</day><month>04</month><year>2024</year></pub-date><volume>10</volume><issue>2</issue><fpage>7</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Калачиков А.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Калачиков А.А.</copyright-holder><copyright-holder xml:lang="en">Kalachikov A.</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/564">https://tuzs.sut.ru/jour/article/view/564</self-uri><abstract><p>В статье рассматривается влияние задержек измеренного состояния канала, вызванное перемещением абонентов и эффектом его старения, на характеристики прекодирования в многопользовательской системе MISO в нисходящем направлении. Рассматриваются алгоритмы прекодирования – метод обнуления интерференции (ZF) и метод, основанный на численной оптимизации для вычисления весовых векторов прекодирования с целью повышения суммарной спектральной эффективности многопользовательской системы. Для проведения численного моделирования используется пакет моделирования радиоканала QuaDRiGa, позволяющий получить необходимый объем реализаций канала MISO при перемещении абонентов с различной скоростью. Сравнение полученных характеристик прекодирования сравниваемых алгоритмов в канале с перемещением абонентов и наличием пространственной корреляции выполняется на основе функции распределения средней спектральной эффективности по множеству пользователей.</p></abstract><trans-abstract xml:lang="en"><p>In paper the numerical investigation of the impact of delayed channel state information (CSI) due to user movement and caused channel aging on the performance of multiuser precoder in downlink MISO system. The time variant CSI is obtained by the least squares channel estimation. We consider Zero Forcing algorithm and numerical optimization based solution of calculating precoder vectors maximizimg sum rate of multiuser system. For numerical simulation the QuaDRiGa channel model reflecting the real propagation conditions for moving users is used. The obtained performance of multiuser Zero Forcing and optimization based beamforming in spatially correlated channel are compared based on the empirical cumulative density function of the sum rate of multiple users.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>многопользовательская система MU-MISO</kwd><kwd>пространственное мультиплексирование</kwd><kwd>модель канала MISO</kwd><kwd>устаревание канала</kwd><kwd>прекодирование MU-MISO</kwd><kwd>спектральная эффективность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multiuser precoding</kwd><kwd>QUADRIGA 3GPP channel model</kwd><kwd>ZF precoding</kwd><kwd>optimal precoding design</kwd><kwd>channel aging</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">Castaneda E., Silva A., Gameiro A., Kountouris M. An Overview on Resource Allocation Techniques for Multi-User MIMO Systems // IEEE Communications Surveys &amp; Tutorials. 2017. Vol. 19. Iss. 1. PP. 239‒284. DOI:10.1109/COMST.2016.2618870</mixed-citation><mixed-citation xml:lang="en">Castaneda E., Silva A., Gameiro A., Kountouris M. An Overview on Resource Allocation Techniques for Multi-User MIMO Systems. IEEE Communications Surveys &amp; Tutorials. 2017;19(1):239‒284. DOI:10.1109/COMST.2016.2618870</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Castañeda E., Silva A., Gameiro A., Kountouris M. An Overview on Resource Allocation Techniques for Multi-User MIMO Systems // Communications Surveys and Tutorials. 2017. Vol. 19. Iss. 1. PP. 239‒284. DOI:10.1109/COMST.2016.2618870</mixed-citation><mixed-citation xml:lang="en">Castañeda E., Silva A., Gameiro A., Kountouris M. An Overview on Resource Allocation Techniques for Multi-User MIMO Systems. Communications Surveys and Tutorials. 2017;19(1):239‒284. DOI:10.1109/COMST.2016.2618870</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Truong K.T., Heath R.W. Effects of channel aging in massive MIMO systems // Journal of Communications and Networks. 2013. Vol. 15. Iss. 4. PP. 338‒351. DOI:10.1109/JCN.2013.000065</mixed-citation><mixed-citation xml:lang="en">Truong K.T., Heath R.W. Effects of channel aging in massive MIMO systems. Journal of Communications and Networks. 2013;15(4):338‒351. DOI:10.1109/JCN.2013.000065</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Yin H., Wang H., Liu Y., Gesbert D. Addressing the Curse of Mobility in Massive MIMO With Prony-Based Angular-Delay Domain Channel Predictions // IEEE Journal on Selected Areas in Communications. 2020. Vol. 38. Iss. 12. PP. 2903‒2917. DOI:10.1109/JSAC.2020.3005473</mixed-citation><mixed-citation xml:lang="en">Yin H., Wang H., Liu Y., Gesbert D. Addressing the Curse of Mobility in Massive MIMO With Prony-Based Angular-Delay Domain Channel Predictions. IEEE Journal on Selected Areas in Communications. 2020;38(12):2903‒2917. DOI:10.1109/JSAC.2020.3005473</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">ETSI TS 138.211 V16.3.0 (2020-11). 5G; NR; Physical channels and modulation.</mixed-citation><mixed-citation xml:lang="en">ETSI TS 138.211 V16.3.0 (2020-11). 5G; NR; Physical channels and modulation.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Chopra R., Murthy C.R., Suraweera H.A., Larsson E.G. Performance Analysis of FDD Massive MIMO Systems Under Channel Aging // IEEE Transactions on Wireless Communications. 2018. Vol. 17. Iss. 2. PP. 1094‒1108. DOI:10.1109/TWC.2017.2775629</mixed-citation><mixed-citation xml:lang="en">Chopra R., Murthy C.R., Suraweera H.A., Larsson E.G. Performance Analysis of FDD Massive MIMO Systems Under Channel Aging. IEEE Transactions on Wireless Communications. 2018;17(2):1094‒1108. DOI:10.1109/TWC.2017.2775629</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Nguyen L.H., Rheinschmitt R., Wild T., Brink S. Limits of channel estimation and signal combining for multipoint cellular radio (CoMP) // Proceedings of the 8th International Symposium on Wireless Communication Systems (Aachen, Germany, 06‒09 November 2011). IEEE, 2011. PP. 176‒180. DOI:10.1109/ISWCS.2011.6125333</mixed-citation><mixed-citation xml:lang="en">Nguyen L.H., Rheinschmitt R., Wild T., Brink S. Limits of channel estimation and signal combining for multipoint cellular radio (CoMP). Proceedings of the 8th International Symposium on Wireless Communication Systems, 06‒09 November 2011, Aachen, Germany. IEEE; 2011. p.176‒180. DOI:10.1109/ISWCS.2011.6125333</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Zheng J., Zhang J., Bjornson E., Ai B. Impact of Channel Aging on Cell-Free Massive MIMO Over Spatially Correlated Channels // IEEE Transactions on Wireless Communications. 2021. Vol. 20. Iss. 10. PP. 6451‒6466. DOI:10.1109/TWC.2021.3074421</mixed-citation><mixed-citation xml:lang="en">Zheng J., Zhang J., Bjornson E., Ai B. Impact of Channel Aging on Cell-Free Massive MIMO Over Spatially Correlated Channels. IEEE Transactions on Wireless Communications. 2021;20(10):6451‒6466. DOI:10.1109/TWC.2021.3074421</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Bengtsson M., Ottersten B. Optimal and Suboptimal Transmit Beamforming // In: Godara L.C. (ed.) Handbook of Antennas in Wireless Communications. CRC Press, 2002.</mixed-citation><mixed-citation xml:lang="en">Bengtsson M., Ottersten B. Optimal and Suboptimal Transmit Beamforming. In: Godara L.C. (ed.) Handbook of Antennas in Wireless Communications. CRC Press; 2002.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Yu W., Lan T. Transmitter Optimization for the Multi-Antenna Downlink With Per-Antenna Power Constraints // IEEE Transactions on Signal Processing. 2007. Vol. 55. Iss. 6. PP. 2646‒2660. DOI:10.1109/TSP.2006.890905</mixed-citation><mixed-citation xml:lang="en">Yu W., Lan T. Transmitter Optimization for the Multi-Antenna Downlink With Per-Antenna Power Constraints. IEEE Transactions on Signal Processing. 2007;55(6):2646‒2660. DOI:10.1109/TSP.2006.890905</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">ETSI TR 138 901 V15.0.0 (2018-07) 5G; Study on channel model for frequencies from 0.5 to 100 GH.</mixed-citation><mixed-citation xml:lang="en">ETSI TR 138 901 V15.0.0 (2018-07) 5G; Study on channel model for frequencies from 0.5 to 100 GH.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Jaeckel S., Raschkowski L., Boerner K., Thiele L., Burkhardt F., Eberlein E. QuaDRiGa ‒ Quasi Deterministic Radio Channel Generator. User Manual and Documentation. Document Revision: v2.2.0. Fraunhofer Heinrich Hertz Institute, 2019.</mixed-citation><mixed-citation xml:lang="en">Jaeckel S., Raschkowski L., Boerner K., Thiele L., Burkhardt F., Eberlein E. QuaDRiGa ‒ Quasi Deterministic Radio Channel Generator. User Manual and Documentation. Document Revision: v2.2.0. Fraunhofer Heinrich Hertz Institute; 2019.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Jaeckel S., Raschkowski L., Boerner K., Thiele L. QuaDRiGa: A 3-D Multicell Channel Model with Time Evolution for Enabling Virtual Field Trials // IEEE Transactions on Antennas Propagation. 2014. Vol. 62. Iss. 6. PP. 3242‒3256. DOI:10.1109/TAP.2014.2310220</mixed-citation><mixed-citation xml:lang="en">Jaeckel S., Raschkowski L., Boerner K., Thiele L. QuaDRiGa: A 3-D Multicell Channel Model with Time Evolution for Enabling Virtual Field Trials. IEEE Transactions on Antennas Propagation. 2014;62(6):3242‒3256. DOI:10.1109/TAP.2014.2310220</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Grant M., Boyd S. CVX: Matlab Software for Disciplined Convex Programming. Version 2.2 // CVX Research. 2020. URL: http://cvxr.com/cvx (Accessed 23.04.2024)</mixed-citation><mixed-citation xml:lang="en">Grant M., Boyd S. CVX: Matlab Software for Disciplined Convex Programming. Version 2.2. CVX Research. 2020. URL: http://cvxr.com/cvx [Accessed 23.04.2024]</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Kalachikov A.A., Streltsov G.G. FPGA implementation of Gaussian noise generator // Proceedings of the International Siberian Workshop on Electron Devices and Materials (Erlagol, Russia, 01‒05 July 2004). IEEE, 2004. DOI:10.1109/PESC.2004.241133</mixed-citation><mixed-citation xml:lang="en">Kalachikov A.A., Streltsov G.G .FPGA implementation of Gaussian noise generator. Proceedings of the International Siberian Workshop on Electron Devices and Materials, 01‒05 July 2004, Erlagol, Russia. IEEE; 2004. DOI:10.1109/PESC.2004.241133</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Калачиков А.А. Анализ характеристик алгоритмов прекодирования сигналов в системе MU-MIMO с группированием абонентов // Труды учебных заведений связи. 2023. Т. 9. № 2. С. 65‒71. DOI:10.31854/1813-324X-2023-9-2-65-71</mixed-citation><mixed-citation xml:lang="en">Kalachikov A. Numerical Evaluation of the MU-MIMO Beamforming Performance with User Selection Algorithm. Proceedings of Telecommunication Universities. 2023;9(2):65‒71. (in Russ.) DOI:10.31854/1813-324X-2023-9-2-65-71</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
