Adaptive Baseband Compensation for I/Q Imbalance and Time-Varying Channel in OFDM System

Author

Hwang, Jeng-Kuang ; Chen, Wei-Ming ; Chiu, Yu-Lun ; Lee, Shin-Ju ; Lin, Jien-Liang

Author_Institution

Dept. of Commun. Eng., Yuan-Ze Inst. Univ., Chung-li

fYear

2006

fDate

12-15 Dec. 2006

Firstpage

638

Lastpage

641

Abstract

This paper proposes adaptive baseband compensation method for the OFDM system in the presence of I/Q imbalance of receiver front-end, and Doppler effect of time-varying channel. A paired-tones model is built up for the applications of two adaptive equalizers - the RLS and NLMS. Special scattered pilot tones in V-pattern are used in conjunction with the adaptive algorithms. The impact of Doppler frequency on the receiver performance is studied through computer simulation

Keywords

Doppler effect; OFDM modulation; adaptive equalisers; compensation; least mean squares methods; receivers; time-varying channels; Doppler effect; Doppler frequency; I/Q imbalance; NLMS; OFDM system; RLS; adaptive baseband compensation; adaptive equalizers; paired-tones model; receiver front-end; scattered pilot tones; time-varying channel; Adaptive algorithm; Adaptive equalizers; Adaptive signal processing; Baseband; Cities and towns; Digital video broadcasting; OFDM; Resonance light scattering; Time-varying channels; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communications, 2006. ISPACS '06. International Symposium on

Conference_Location

Yonago

Print_ISBN

0-7803-9732-0

Electronic_ISBN

0-7803-9733-9

Type

conf

DOI

10.1109/ISPACS.2006.364737

Filename

4212355