基于决策反馈滤波器的扩频接收机窄带干扰和多径抑制

[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings Pub Date : 1991-05-09 DOI:10.1109/PACRIM.1991.160829

T. Ogawa, I. Sasase, S. Mori

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引用次数: 2

摘要

研究了采用决策反馈(DF)滤波器的差分相移键控(DPSK)直接序列扩频接收机在窄带干扰和多径条件下的性能。首先，得到了DF滤波器最优抽头权重和最小均方误差的一般解析表达式;其次，作者计算了具有最佳抽头权重的系统的输出信噪比(SNR)。作者还通过计算机模拟考虑了误码率。最后，考虑了采用递归最小二乘(RLS)算法的自适应DF滤波器。结果表明，在扩频系统中，双面DF滤波器在抑制干扰和多径方面都有较好的效果。作者还发现，采用RLS算法的自适应DF滤波器具有较快的收敛性。

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Suppression of narrow-band interference and multipath by spread-spectrum receiver using decision-feedback filters

The performance of a differential phase-shift-keying (DPSK) direct-sequence (DS) spread-spectrum receiver using decision-feedback (DF) filters in the presence of narrowband interference and multipath is considered. First, the general analytic expressions for the optimum tap weights of the DF filters and minimum mean square errors are obtained. Next, the authors calculate the output signal-to-noise ratio (SNR) of the system having the optimum tap weights. The authors also consider the bit-error-rate (BER) by computer simulation. Finally, the adaptive DF filters using a recursive least squares (RLS) algorithm are considered. It is found that the two-sided DF filter is superior for suppressing both interference and multipath in the spread-spectrum system. The authors also find that the adaptive DF filter using the RLS algorithm has rapid convergence.<>

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来源期刊

[1991] IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Conference Proceedings

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