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Adaptive Grouping MMSE Channel Estimation in OFDM-Based Wireless Systems

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Authors
Ban, Dae-Seung; Kim, Cheong-Hwan; Lee, Yong-Hwan
Issue Date
2008-10
Citation
APCC 2008. 14th Asia-Pacific Conference on Communications, 2008
Keywords
channel estimationgrouping MMSEOFDM
Abstract
In this paper, we design an minimum meansquare
error (MMSE)-type channel estimation scheme in
orthogonal frequency division multiplexing-based wireless
systems. By using the averaged channel frequency response
(CFR) of pilot symbols in a group as a representative CFR ,
the proposed MMSE channel estimator can reduce the
mean-square error (MSE) of channel estimation by achieving
the signal-to-noise ratio (SNR) gain without increasing the
computational complexity compared to conventional MMSE
channel estimator. The grouping size of pilot symbols is
optimized to minimize the MSE according to the channel
correlation characteristics. Finally, the performance of the
proposed channel estimation scheme is verified by computer
simulation.
Language
English
URI
http://www.apcc2008.ieice.org

http://hdl.handle.net/10371/7539
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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