Single carrier frequency domain equalization based selection feedback detecting method

Abstract

The invention provides a selective feedback detecting method based on the single-carrier wave frequency domain equalization, in particular to a mobile communication system for transferring high-speeddata via a plurality of sending antennas and receiving antennas, belonging to the technical field of single-carrier wave frequency domain equalization (SC-FDE) used for alleviating intersymbol interference in broadband system. The invention is characterized in that: on the receiving end of the multi-antenna transmission system or the receiving machine of the multi-antenna sending multi-antenna receiving single-carrier wave transmission system, a time domain feedback filter can be arranged on the tap feedback position minimizing the mean minimum mean square error by obtaining the mean minimummean square errors in all feasible feedback modes, according to certain channel mode and time domain feedback order, and based on the rule of minimum mean square error; the tap coefficients in frequency domain and time domain can be obtained based on the rule of minimum mean square error to the detecting signals, and then the filter formed by the tap coefficients is used to detect the symbolic information of the current data block. The invention can be divided into a non-adaptive feedback detecting method and an adaptive feedback detecting method according to whether the structure of the timedomain filter is stationary or not.

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) technique for alleviating the problem of inter-symbol interference in a broadband system, in particular to a A signal detection method for a 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] Research on information theory shows that under the condition of wireless channel with rich scattering, the multiple-input multiple-output (MIMO) system can obtain higher capacity than the single-send-single-receive system. At the transmitter, different transmit antennas send different symbol streams. At the receiving end, the transmitted symbols are recovered from 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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