Low-complexity equalization of rapidly time-varying multi-path channels for OFDM systems

Authors:
Han Zhang;Xianhua Dai;Dong Li
Affiliations:
School of Physics & Telecommunications, South China Normal University, Guangzhou, China;Department of Electronics, School of Information Science & Technology, Guangzhou, China;Department of Electronics, School of Information Science & Technology, Guangzhou, China
Venue:
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Year:
2009

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Abstract

In this paper, we present a low-complexity equalizer for Orthogonal Frequency Division Multiplexing (OFDM) systems over rapidly time-varying multi-path channels. By taking advantage of the time-domain receiver windowing, the computational complexity of the equalization algorithm is linear in the number of sub-carriers and turns out to be smaller than the existing time-varying channel equalization methods. Simulations show that the proposed approach exhibits fairly robust to the time variation of channel.