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Proceedings Paper

Close-loop decision-directed pre-equalization for OFDM systems
Author(s): Yujun Kuang; Keping Long; Yanjun Wang; Xiaolong Yang; Qianbin Chen; Yun Li
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Paper Abstract

The paper proposes a close-looped decision-directed pre-equalization scheme for OFDM systems, which can be divided into two stages: i) initialization stage; ii) calibrating and tracking stage. At the first stage, the transmitter set the pre-load information to all ones, and the receiver estimates the real channel information and returns it to the transmitter; after that the receiver would view an almost-flat fading channel and directly decode the constellations, and when no error found, it remap the data to constellation to create a local pilot to obtain a better estimation of apparent channel for the transmitter to repeatedly adjust its pre-load information. Simulation results show that the performance of iterative pre-equalization is better than that of conventional pre-equalization and post-equalization in the receiver and will be much better at high SNR.

Paper Details

Date Published: 28 September 2006
PDF: 8 pages
Proc. SPIE 6354, Network Architectures, Management, and Applications IV, 635420 (28 September 2006); doi: 10.1117/12.691668
Show Author Affiliations
Yujun Kuang, Univ. of Electronic Science and Technology of China (China)
Chongqing Univ. of Posts and Telecommunications (China)
Keping Long, Univ. of Electronic Science and Technology of China (China)
Chongqing Univ. of Posts and Telecommunications (China)
Yanjun Wang, Chongqing Univ. of Posts and Telecommunications (China)
Xiaolong Yang, Univ. of Electronic Science and Technology of China (China)
Qianbin Chen, Chongqing Univ. of Posts and Telecommunications (China)
Yun Li, Chongqing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 6354:
Network Architectures, Management, and Applications IV
Yong Hyub Won; Gee-Kung Chang; Ken-ichi Sato; Jian Wu, Editor(s)

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