带有误差反馈结构的多天线变步长均衡算法

doi:10.3969/j.issn.1001-2400.2017.05.027

Abstract

Abstract:

Owning to the correlation of the error signal in multi-antenna diversity adaptive decision feedback equalization being not same with white noises', the equalization performance is constrained. This paper adds error feedback filters to the traditional multi-antenna diversity adaptive decision feedback equalizer. The proposed structure can decrease the correlation of the error signal to increase the performance under the mean square error criterion. However, the proposed structure lowers the algorithm's convergence speed. Consequently, a nonlinear function between step size and error signal by modifying the sigmoid function in order to make this variable step-size measure be adapted to decision feedback equalizers is proposed. The modified algorithm has a larger step size at beginning. Simulation results show that the proposed approach can increase the speed and lower mean square with only little increase in computation.

Key words: spatial diversity, decision feedback equalization, error feedback, Inter-symbol interference, variable step size

HOU Xiaojian;XU Hua;ZENG Leya. Variable step size multi-antenna diversity equalization algorithm using error feedback[J].Journal of Xidian University, 2017, 44(5): 158-164.

References

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Variable step size multi-antenna diversity equalization algorithm using error feedback

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