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Proceedings Paper

An improved channel estimation for OFDM transmit systems
Author(s): Zhongbao Ji
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Paper Abstract

In this paper, an improved channel estimation algorithm for orthogonal frequency-division multiplexing mobile communication systems is proposed. Generally, the channel transfer function (CTF) is directly used to detect the transmitted data after being estimated. But the error between the detected data and the original data decreases the capability of the communication system. In order to get more precisely estimated result, the recursive algorithm is adopted in this process. The process consists of three steps. First, the estimation of the CTF at pilot subcarriers is done based on least squares (LS) and LMMSE criterions. Then, the Temporal Window will filter the noise in the channel at the time domain, a recursive method is investigated to reduce the ugly parts of the estimated CFT based on Wiener&Kolmogorov optimum filter. The simulation results show that the improved estimator provided better performance than the regular LS and LMMSE estimator.

Paper Details

Date Published: 1 October 2011
PDF: 7 pages
Proc. SPIE 8285, International Conference on Graphic and Image Processing (ICGIP 2011), 82857B (1 October 2011); doi: 10.1117/12.913520
Show Author Affiliations
Zhongbao Ji, Wenzhou Vocational and Technical College (China)

Published in SPIE Proceedings Vol. 8285:
International Conference on Graphic and Image Processing (ICGIP 2011)
Yi Xie; Yanjun Zheng, Editor(s)

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