Title :
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
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;
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
DOI :
10.1109/ISPACS.2006.364737
