DocumentCode
774284
Title
Sparse channel estimation in OFDM systems by threshold-based pruning
Author
Oliver, J. ; Aravind, R. ; Prabhu, K.M.M.
Author_Institution
Dept. of Electr. Eng., Indian Inst. of Technol. Madras, Chennai
Volume
44
Issue
13
fYear
2008
Firstpage
830
Lastpage
832
Abstract
A threshold-based procedure to estimate sparse channels in an orthogonal frequency division multiplexing (OFDM) system is proposed. An optimal threshold is derived by maximising the probability of correct detection between significant and zero-valued taps estimated by the least squares (LS) estimator. Improved LS estimates are obtained by pruning the LS estimates with the statistically derived threshold.
Keywords
OFDM modulation; channel estimation; estimation theory; least squares approximations; probability; OFDM system; correct detection probability; least square estimator; orthogonal frequency division multiplexing; sparse channel estimation; threshold-based pruning; zero-valued tap estimation;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20081089
Filename
4550715
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