A new channel equalizer for OFDM-based wireless communications

Yuan Mao Chang*, Cheng Wei Kuang, Chien Ching Lin, Tzu-Hsien Sang, Hsie-Chia Chang, Chen-Yi Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents a new channel equalizer for OFDM-based communication systems. The channel equalizer consists of the adaptive estimation of channel frequency response (CFR) and the signal recovery. CFR is obtained by the two-dimensional linear interpolation of pilots from the frequency axis and the time axis. To avoid the noise enhancement in signal recovery, maximum-likelihood sequence estimation (MLSE) is applied to improve 1.5dB in SNR while using Rayleigh fading channel model with 30Hz Doppler frequency shift. As compared to the linear equalizer without feedback, the division free approach provides more accurate signal recovery in circuit implementation.

Original languageEnglish
Title of host publication2005 IEEE VLSI-TSA International Symposium on VLSI Design, Automation and Test,(VLSI-TSA-DAT)
Pages104-107
Number of pages4
DOIs
StatePublished - 1 Dec 2005
Event2005 IEEE VLSI-TSA International Symposium on VLSI Design, Automation and Test,(VLSI-TSA-DAT) - Hsinchu, Taiwan
Duration: 27 Apr 200529 Apr 2005

Publication series

Name2005 IEEE VLSI-TSA International Symposium on VLSI Design, Automation and Test,(VLSI-TSA-DAT)
Volume2005

Conference

Conference2005 IEEE VLSI-TSA International Symposium on VLSI Design, Automation and Test,(VLSI-TSA-DAT)
CountryTaiwan
CityHsinchu
Period27/04/0529/04/05

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