NDLI: Time-Domain Oversampled Receiver for OFDM in Underwater Acoustic Communication

Content Provider	IEEE Xplore Digital Library
Author	Zhenrui Chen Jintao Wang Chao Zhang Jian Song
Copyright Year	2014
Description	Author affiliation: Dept. of Electron. Eng., Tsinghua Univ., Beijing, China (Zhenrui Chen; Jintao Wang; Chao Zhang; Jian Song)
Abstract	In this paper, we propose a time-domain oversampled receiver for orthogonal frequency division multiplexing (OFDM) in underwater acoustic communication. Without changing the structure of the transmitter, significant gains are acquired by time- domain oversampling at the receiver. Using time- domain oversampling, the energy of transmitted symbols is concentrated on the first N subcarriers, while additive Gaussian noises are distributed in all the subcarriers. Because of the sparsity of underwater acoustic channels, most energy of the channel impulse responds is concentrated on a few paths, and other positions are submerged by noises. Channel estimation based on the discrete Fourier transform is employed to eliminate noises. After estimating the energy of additive Gaussian noises, the truncation of channel impulse responds eliminates the majority of noises. Simulations are implemented in multipath channels and fading channels. Without changing the structure of the transmitter, the proposed oversampled receiver outperforms the conventional receiver in bit error rate (BER) performances significantly, with a little increased computational complexity.
Starting Page	1
Ending Page	5
File Size	169620
Page Count	5
File Format	PDF
ISBN	9781479944491
DOI	10.1109/VTCFall.2014.6966210
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Channel estimation OFDM Time-domain analysis Noise Bit error rate Underwater acoustics
Content Type	Text
Resource Type	Article

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