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arXiv 1502.05484cs.ITcs.SYeess.SYmath.IT
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在脉冲噪声存在下的鲁棒自适应稀疏信道估计

Robust Adaptive Sparse Channel Estimation in the Presence of Impulsive Noises

Akita Prefectural University(秋田公立大学);Xi’an Jiaotong University(西安交通大学)

Guan Gui, Li Xu, Wentao Ma, Badong Chen

AI总结:

本文提出基于符号最小均方算法的鲁棒稀疏自适应滤波算法,用于信道估计和抑制脉冲噪声,通过不同稀疏诱导惩罚函数提升算法鲁棒性。

摘要:

宽带无线信道通常具有稀疏性。基于高斯噪声模型,提出了自适应滤波算法用于重建稀疏信道。然而,许多先进宽带通信系统中存在脉冲噪声,传统算法易受其干扰而退化。本文提出基于符号最小均方算法(SLMS)的鲁棒稀疏自适应滤波算法,用于信道估计和抑制脉冲噪声。通过使用不同的稀疏诱导惩罚函数,即零吸引(ZA)、加权ZA(RZA)、加权L1范数(RL1)和Lp范数(LP),所提出的SLMS算法分别称为SLMS-ZA、SLMS-RZA、LSMS-RL1和SLMS-LP。给出了仿真结果以验证所提算法。

英文摘要:

Broadband wireless channels usually have the sparse nature. Based on the assumption of Gaussian noise model, adaptive filtering algorithms for reconstruction sparse channels were proposed to take advantage of channel sparsity. However, impulsive noises are often existed in many advance broadband communications systems. These conventional algorithms are vulnerable to deteriorate due to interference of impulsive noise. In this paper, sign least mean square algorithm (SLMS) based robust sparse adaptive filtering algorithms are proposed for estimating channels as well as for mitigating impulsive noise. By using different sparsity-inducing penalty functions, i.e., zero-attracting (ZA), reweighted ZA (RZA), reweighted L1-norm (RL1) and Lp-norm (LP), the proposed SLMS algorithms are termed as SLMS-ZA, SLMS-RZA, LSMS-RL1 and SLMS-LP. Simulation results are given to validate the proposed algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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