DocumentCode :
3172952
Title :
Blind frequency-dependent IQ imbalance compensation scheme using CMA for OFDM system
Author :
Matsui, Munehiro ; Nakagawa, Tadao ; Kudo, Riichi ; Ishihara, Koichi ; Mizoguchi, Masato
Author_Institution :
NTT Network Innovation Labs., NTT Corp., Yokosuka, Japan
fYear :
2011
fDate :
11-14 Sept. 2011
Firstpage :
1386
Lastpage :
1390
Abstract :
Frequency-dependent IQ imbalance will be one of the degrading factors for future wideband wireless communication systems. This paper presents a blind compensation scheme for the frequency-selective IQ imbalance that occurs in wideband OFDM transceivers. The proposed scheme uses 2-tap filters having weights calculated by a constant modulus algorithm, which does not require any training or pilot signals. We verified by computer simulation that our proposed scheme compensates for frequency-dependent IQ imbalance in OFDM transceivers. We also show some experimental results, in which a frequency-dependent IQ imbalance over 6 GHz is compensated for by our proposed scheme.
Keywords :
OFDM modulation; radiocommunication; 2-tap filters; CMA; OFDM transceivers; blind frequency-dependent IQ imbalance compensation scheme; constant modulus algorithm; frequency 6 GHz; pilot signals; wideband wireless communication systems; Bit error rate; Frequency modulation; Gain; OFDM; Receivers; Training; Wideband; CMA; OFDM; blind; compensation; frequency dependent IQ imbalance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on
Conference_Location :
Toronto, ON
ISSN :
pending
Print_ISBN :
978-1-4577-1346-0
Electronic_ISBN :
pending
Type :
conf
DOI :
10.1109/PIMRC.2011.6140626
Filename :
6140626
Link To Document :
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