Iterative Carrier Frequency Offset and Channel Estimation for Underwater Acoustic OFDM Systems

被引：95

作者：

Kang, Taehyuk ^{[1
]}

Iltis, Ronald A. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 2008年 / 26卷 / 09期

关键词：

OFDM; low-density parity-check codes; underwater acoustic communications; iterative receiver; carrier frequency offset; Matching Pursuits; EXIT chart;

D O I：

10.1109/JSAC.2008.081205

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：

This paper presents a practical low-density parity-check (LDPC) coded OFDM system designed for the underwater acoustic channel with its attendant sparse multipath channel and Doppler effects. The carrier frequency offset (CFO) and channel state information (CSI) are assumed unavailable to both to the transmitter and the receiver. Several different receiver structures are considered, all of which perform CFO/channel estimation, detection and decoding in an iterative manner. The convergence behavior of the iterative receivers and their asymptotic performance are evaluated using the extrinsic information transfer (EXIT) chart method. OFDM receiver performance is further evaluated through simulations and field tests in shallow water.

引用

页码：1650 / 1661

页数：12

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