NDLI: Low-Complexity Blind Equalization for OFDM Systems With General Constellations

Content Provider	IEEE Xplore Digital Library
Author	Al-Naffouri, T.Y. Dahman, A.A. Sohail, M.S. Weiyu Xu Hassibi, B.
Copyright Year	1991
Abstract	This paper proposes a low-complexity algorithm for blind equalization of data in orthogonal frequency division multiplexing (OFDM)-based wireless systems with general constellations. The proposed algorithm is able to recover the transmitted data even when the channel changes on a symbol-by-symbol basis, making it suitable for fast fading channels. The proposed algorithm does not require any statistical information about the channel and thus does not suffer from latency normally associated with blind methods. The paper demonstrates how to reduce the complexity of the algorithm, which becomes especially low at high signal-to-noise ratio (SNR). Specifically, it is shown that in the high SNR regime, the number of operations is of the order O(LN), where L is the cyclic prefix length and N is the total number of subcarriers. Simulation results confirm the favorable performance of the proposed algorithm.
Sponsorship	IEEE Signal Processing Society
Starting Page	6395
Ending Page	6407
Page Count	13
File Size	3988967
File Format	PDF
ISSN	1053587X
Volume Number	60
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Signal processing algorithms Blind equalizers Signal to noise ratio Wireless communication Complexity theory OFDM and recursive least squares Channel estimation maximum a posteriori detection maximum-likelihood detection
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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