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A Novel Channel Compensation and Equalization scheme for an OFDM Based Modem  

Seo, Jung-Hyun (충북대학교 정보통신공학과 통신회로 및 시스템설계 연구실)
Lee, Hyun (한국전자통신연구원 이동통신연구소 텔레매틱스연구팀)
Cheong, Cha-Keon (호서대학교 정보제어공학과)
Cho, Kyoung-Rok (충북대학교 정보통신공학과 통신회로 및 시스템설계 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.12A, 2003 , pp. 1009-1018 More about this Journal
Abstract
A new fading channel estimation technique is proposed for an OFDM based modem In the ITS system. The algorithm is based on the transfer function extraction of the channel using the pilot signals and compensated the channel preceding the equalization. The newly derived algorithm is division-free arithmetic operations allows the faster circuit operation and the smaller circuit size. Proposed techniques compensate firstly the distortion which is generated at fading channels and secondly eliminate inter-symbol interference. All algorithms are suitability estimated and improved for a system implementation using digital circuits. As the results, the circuit size is reduced by 20% of the conventional design and achieved about 10% performance improvement at low SNR under 10dB in case of ITS system adapted 16-QAM mode.
Keywords
ITS; OFDM; channel compensation; pilot signal; doppler fading;
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