sibsutisВестник СибГУТИThe Herald of the Siberian State University of Telecommunications and Information Science1998-6920СибГУТИ10.55648/1998-6920-2024-18-4-32-42sibsutis-896Research ArticleСтатьиИсследование влияния эффекта устаревания канала связи на характеристики прекодирования в системе MU-MISO при различной скорости перемещения абонентовInvestigation of the influence of the effect of communication channel aging on the characteristics of precoding in the MU-MISO system at different speeds of movement of subscribershttps://orcid.org/0000-0003-1235-6314КалачиковА. А.KalachikovA. A.

Калачиков Александр Александрович - к.т.н., доцент кафедры радиотехнических систем,

630102, Новосибирск, ул. Кирова, д. 86.

Aleksander A. Kalachikov - Сand. of Sci. (Engineering), Lecturer of the Department of Radio Systems,

86, Kirov St., Novosibirsk, 630102.

kalatch@sibguti.ruhttps://orcid.org/0009-0002-6875-7061РезванИ. И.RezvanI. I.

Резван Иван Иванович - к.т.н., доцент кафедры радиотехнических систем,

630102, Новосибирск, ул. Кирова, д. 86.

Ivan I. Rezvan - Сand. of Sci. (Engineering), Lecturer of the Department of Radio Systems, 

86, Kirov St., Novosibirsk, 630102.

rezvan@sibsutis.ruhttps://orcid.org/0000-0002-7851-3012СтенинА. В.SteninA. V.

Стенин Александр Владиславович - старший преподаватель кафедры инфокоммуникационных систем и сетей,

630102, г. Новосибирск, ул. Кирова, д. 86.

Aleksander V. Stenin - Senior Lecturer of the Department of Radio Systems, 

86, Kirov St., Novosibirsk, 630102.

av.stenin@yandex.ruСибирский государственный университет телекоммуникаций и информатики (СибГУТИ)РоссияSiberian State University of Telecommunications and Information Science (SibSUTIS)Russian Federation202412052024184Вестник СибГУТИ3242Copyright © Калачиков А.А., Резван И.И., Стенин А.В., 20242024Калачиков А.А., Резван И.И., Стенин А.В.Kalachikov A.A., Rezvan I.I., Stenin A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.sibsutis.ru/jour/article/view/896

В статье рассматривается влияние задержек измеренного состояния канала, вызванное перемещением абонентов и связанным с задержками эффектом устаревания канала на характеристики прекодирования на основе метода кодовых книг ДПФ в многопользовательской системе MISO в нисходящем направлении. Оценка канала получена при помощи алгоритма MMSE. В работе рассматривается алгоритм прекодирования на основе кодовых книг и метод, основанный на численной оптимизации для вычисления весовых векторов прекодирования с целью повышения суммарной спектральной эффективности многопользовательской системы.

Для проведения численного моделирования использовался 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.

The paper deals with the impact of measured channel state delays caused by subscriber movement and the delay-related effects of channel aging on the performance of DFT codebook precoding in a downstream multi-user MISO system. The channel estimate is obtained using the MMSE algorithm. The paper discusses a precoding algorithm based on codebooks and a method based on numerical optimization for calculating precoding weight vectors in order to increase the total spectral efficiency of a multi-user system.

To carry out numerical modeling, the QUADRIGA radio channel modeling package was used, which allows us to obtain the required volume of MISO channel implementations when subscribers move at different speeds. A comparison of the obtained precoding characteristics of the compared algorithms in a channel with movement of subscribers and the presence of spatial correlation is performed based on the distribution function of the average spectral efficiency over a set of users.

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The authors declare that there are no conflicts of interest present.