NDLI: Blind Channel Estimation for OFDM Systems via a Generalized Precoding

Content Provider	IEEE Xplore Digital Library
Author	Feifei Gao Nallanathan, A.
Copyright Year	1967
Abstract	In this paper, we consider the problem of blind channel estimation for single-input-single-output (SISO) orthogonal frequency-division multiplexing (OFDM) system via second-order statistics only. Based on the assumption that the transmitted symbols are independent and identically distributed, we develop a simple blind channel estimation technique for OFDM systems by utilizing a generalized linear nonredundant block precoding. Instead of using partial information from the signal covariance matrix, as done in previous works where a specific precoder is designed and only one column of the signal covariance matrix is exploited, our work jointly considers all the information contained in the signal covariance matrix. Compared to the popular subspace-based blind channel estimation methods, the proposed algorithm is much more computationally efficient. A design criterion of the precoders by which the performance can be improved is provided, and the closed-form stochastic Crameacuter-Rao bound is derived. The numerical results clearly show the effectiveness of our proposed algorithm, as well as its improvement over the existing techniques
Sponsorship	IEEE Vehicular Technology Society
Starting Page	1155
Ending Page	1164
Page Count	10
File Size	272952
File Format	PDF
ISSN	00189545
Volume Number	56
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Blind equalizers OFDM Covariance matrix Frequency division multiplexing Channel estimation Stochastic processes Local area networks Wireless communication Multimedia communication Statistical distributions wireless communications Blind channel estimation block precoding block transmissions high-performance local area network (HIPERLAN)/2 IEEE 802.11a orthogonal frequency-division multiplexing (OFDM) stochastic Cramér–Rao bound (CRB)
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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