Joint Channel and Impulsive Noise Estimation in Underwater Acoustic OFDM Systems

被引：31

作者：

Chen, Peng ^{[1
]}

Rong, Yue ^{[1
]}

Nordholm, Sven ^{[1
]}

He, Zhiqiang ^{[2
,3
]}

机构：

[1] Curtin Univ, Dept Elect & Comp Engn, Bentley, WA 6845, Australia

[2] Beijing Univ Posts & Telecommun, Key Lab Univ Wireless Commun, Minist Educ, Beijing 100876, Peoples R China

[3] Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Minist Educ, Xiamen 361005, Peoples R China

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2017年 / 66卷 / 11期

基金：

澳大利亚研究理事会;

关键词：

EM; impulsive noise; OFDM; underwater acoustic communication; AMBIENT NOISE; PERFORMANCE; ALGORITHMS;

D O I：

10.1109/TVT.2017.2743220

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Impulsive noise is one key factor that limits the performance of underwater acoustic (UA) communications. In this paper, two pilot-subcarrier based algorithms are proposed to improve the performance of channel estimation and impulsive noise mitigation for UA orthogonal frequency-division multiplexing (OFDM) systems. The first algorithm jointly estimates the channel and the impulsive noise based on the least-squares principle. The second algorithm is developedwith the aim to reduce the computational complexity, where the expectation-maximization principle is applied to estimate the channel and the impulsive noise iteratively. We compare the proposed algorithms by simulations and apply them to process the data collected during an experiment conducted in December 2015 in the estuary of the Swan River, Western Australia. The results show that both proposed algorithms have better performance than existing methods in mitigating impulsive noise in UA OFDM systems.

引用

页码：10567 / 10571

页数：5

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