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A New Fast Wavelet Transform Based Adaptive Algorithm for OFDM Adaptive Equalizer and its VHDL Implementation  

Joung, Min-Soo (대구대학교 정보통신공학과 신호처리 연구실)
Lee, Jae-Kyun (대구대학교 정보통신공학과 신호처리 연구실)
Lee, Chae-Wook (대구대학교 정보통신공학과 신호처리 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.11C, 2006 , pp. 1107-1119 More about this Journal
Abstract
Data transmission experiences multiplicative distortion in frequency nonselective fading channel. This distortion occurs in OFDM communication channel and can be compensated using an equalizer. Usually, in the case of LMS equalizer, eigenvalue distribution of training signal is enlarged. Large eigenvalue distribution causes principally the performance of a communication system to be deteriorated. This paper proposes a new algorithm that shows the same performance as the existing fast wavelet transform algorithm with less computational complexity. The proposed algorithm was applied to an adaptive equalizer of OFDM communication system. Matlab simulation results show a better performance than the existing one. The proposed algorithm was implemented in VHDL and simulated.
Keywords
OFDM; Fast Wavelet; VHDL;
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