Adaptive Geman-McClure Estimator for Robust Distributed Channel Estimation

被引：10

作者：

Wilson, Annet Mary ^{[1
]}

Panigrahi, Trilochan ^{[1
]}

Mishra, Bishnu Prasad ^{[1
]}

Sabat, Samrat L. ^{[2
]}

机构：

[1] Natl Inst Technol Goa, Dept Elect & Commun Engn, Farmagudi 403401, Goa, India

[2] Univ Hyderabad, Ctr Adv Studies Elect Sci & Technol, Sch Phys, Hyderabad 500046, India

来源：

IEEE ACCESS | 2021年 / 9卷

关键词：

Channel estimation; diffusion cooperation; distributed algorithms; Geman-McClure; robust estimation; wireless sensor networks; IMPULSIVE NOISE MITIGATION; LMS ALGORITHM; OFDM SYSTEMS; CORRENTROPY; FORMULATION; STRATEGIES;

D O I：

10.1109/ACCESS.2021.3093001

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Communication systems are affected by channel distortions. Impulsive noise is one of the significant factors for channel impairments. The standard additive white Gaussian noise (AWGN) channel model and conventional estimation algorithms like least mean square (LMS) and its variants tend to be ineffective under such conditions. This paper presents a robust adaptive channel estimation algorithm using the Geman-McClure estimator in a diffusion-based distributed network. The analytical study on mean stability and mean square analysis is carried out under two separate noise statistics: Symmetric alpha-stable (S alpha S) and Bernoulli-Gaussian (BG) distribution. The computer simulations confirm the proposed algorithm's competitive robustness compared to the Maximum Correntropy Criterion and Minimum Kernel Risk Sensitive Loss algorithms at a high impulsive noise environment without exponential cost function. Further, the efficiency is also verified by simulating the bit error rate by designing a minimum mean square error (MMSE) equalizer with the estimated coefficients.

引用

页码：93691 / 93702

页数：12

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