RU2008131511A - METHOD FOR DECODING IN MULTI-ANTENNA TRANSMISSION SYSTEM (OPTIONS) - Google Patents
METHOD FOR DECODING IN MULTI-ANTENNA TRANSMISSION SYSTEM (OPTIONS) Download PDFInfo
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Abstract
1. Способ декодирования принятых сигналов в многоантенной системе приемопередачи (MIMO) с единой несущей частотой (SC) и с ортогональным частотным мультиплексированием (OFDM), где в систему входит Nt передающих антенн и Nr приемных антенн, причем информационные символы передаются всеми Nt антеннами в одном частотном диапазоне, а единую несущую частоту и ортогональное частотное мультиплексирование (SC-OFDM) используют для модуляции сигнала, при этом способ предусматривает выполнение следующих операций: ! получают транслируемый сигнал на каждой из Nr антенн и выполняют быстрое преобразование Фурье (FFT) в отношении принятого сигнала, ! на основе информации о пилотных сигналах осуществляют оценку канала в частотном домене для каналов между каждым передатчиком и каждым приемником, определяют Nr×Nt матрицу H канала, выполняют итерационную операцию декодирования принятых символов, состоящую из следующих шагов: ! исходя из матрицы решения минимума среднего квадрата ошибки (MMSE) в частотном домене, определяют наилучший поток, демонстрирующий наименьший усредненный показатель шума среди всех поднесущих частот, что определяется на основе наибольшего значения суммы , где является строкой матрицы W(k) фильтра MMSE на шаге i итерации, является столбцом в матрице H(k), соответствующим потоку Тх с индексом nt, k - индекс поднесущей; ! для наилучшего потока Тх получают MMSE-решение в частотном домене и оценивают его дисперсию, затем переводят решение во временной домен путем обратного дискретного преобразования Фурье (IDTF); ! исходя из решения во временном домене и оценки его дисперсии, находят логарифм отношения правдоподобия (LLR) для выходящих бит�1. A method of decoding received signals in a multi-antenna transmission system (MIMO) with a single carrier frequency (SC) and orthogonal frequency multiplexing (OFDM), where the system includes Nt transmit antennas and Nr receive antennas, and information symbols are transmitted by all Nt antennas in one frequency range, and a single carrier frequency and orthogonal frequency multiplexing (SC-OFDM) are used to modulate the signal, the method involves the following operations:! receive a broadcast signal on each of the Nr antennas and perform fast Fourier transform (FFT) with respect to the received signal,! Based on the information about the pilot signals, a channel is estimated in the frequency domain for the channels between each transmitter and each receiver, the Nr × Nt matrix H of the channel is determined, and an iterative decoding operation of the received symbols is performed, consisting of the following steps:! on the basis of the solution matrix of the minimum mean square error (MMSE) in the frequency domain, the best stream is determined that shows the lowest average noise figure among all frequency subcarriers, which is determined based on the highest value of the sum, where is the row of the MMSE filter matrix W (k) in step i iteration, is a column in the matrix H (k) corresponding to the flow Tx with index nt, k is the subcarrier index; ! for the best TX stream, an MMSE solution is obtained in the frequency domain and its variance is estimated, then the solution is transferred to the time domain by the inverse discrete Fourier transform (IDTF); ! Based on the solution in the temporary domain and the estimation of its variance, we find the logarithm of the likelihood ratio (LLR) for the outgoing bits�
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RU2008131511/09A RU2008131511A (en) | 2008-07-31 | 2008-07-31 | METHOD FOR DECODING IN MULTI-ANTENNA TRANSMISSION SYSTEM (OPTIONS) |
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RU2008131511/09A RU2008131511A (en) | 2008-07-31 | 2008-07-31 | METHOD FOR DECODING IN MULTI-ANTENNA TRANSMISSION SYSTEM (OPTIONS) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116151009A (en) * | 2023-02-27 | 2023-05-23 | 哈尔滨工业大学 | Frequency response identification method for ultra-precise motion system |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116151009A (en) * | 2023-02-27 | 2023-05-23 | 哈尔滨工业大学 | Frequency response identification method for ultra-precise motion system |
CN116151009B (en) * | 2023-02-27 | 2023-07-18 | 哈尔滨工业大学 | Frequency response identification method for ultra-precise motion system |
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FA92 | Acknowledgement of application withdrawn (lack of supplementary materials submitted) |
Effective date: 20100224 |