Single carrier frequency domain equalization based selection feedback detecting method

Abstract

A selective feedback detection method based on single-carrier frequency domain equalization relates to a mobile communication system that transmits high-speed data by using multiple transmit antennas / receive antennas, and involves single-carrier frequency domain equalization (SC) to alleviate inter-symbol interference problems in broadband systems -FDE) technology, in the multi-antenna transmission system or multi-antenna transmission multi-antenna reception single-carrier transmission system receiver, at the receiving end, according to the determined channel model and time-domain feedback order, based on the minimum mean square error criterion, can By obtaining the average minimum mean square error in various feasible feedback modes, select the tap feedback position that makes the average minimum mean square error the smallest to construct an AND feedback filter; then based on the minimum mean square error criterion for the detected symbol, it can be The tap coefficients in the frequency domain and time domain are obtained, and the filter formed by the tap coefficients is used to detect the symbol information of the current data block. According to whether the structure of the time domain filter is fixed, the method can be divided into non-adaptive feedback detection methods.

Description

Technical field [0001] The present invention relates to a mobile communication system that transmits high-speed data by using multiple transmitting antennas / receiving antennas, and relates to a single carrier frequency domain equalization (SC-FDE) technology to alleviate the problem of inter-symbol interference in broadband systems, and in particular to a Signal detection method for multi-antenna wireless communication system. The wireless communication system involved has one or more receiving antennas and one or more transmitting antennas. Background technique [0002] Information theory research shows that under the condition of a wireless channel with abundant scattering, a multiple-input multiple-output (MIMO) system can obtain a higher capacity than a single-transmit-single-receive system. At the transmitting end, different transmitting antennas send different symbol streams. The receiving end recovers the transmitted symbols based on the received symbols formed by superimp...

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Problems solved by technology

[0004] Technical problem: Based on the noise prediction model, the present invention proposes a selective feedback detection method based on single-carrier frequency domain equalization. The basic idea of ​​this method is to select the best time domain feedback signal to predict the interference noise of the current symbol to be detected. Through the calculation and equalization of tap coefficients similar to traditional FDE-NP, the performance can be significantly improved under the same complexity

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