Title :
A Novel IQ Imbalance Compensation Method with Pilot-Signals for OFDM System
Author :
Egashira, Yoshimasa ; Tanabe, Yasuhiko ; Sato, Kazumi
Author_Institution :
Corp. R&D Center, Toshiba Corp., Kawasaki
Abstract :
Orthogonal frequency division multiplex (OFDM) using a high-order modulation suffers from effects of in-phase and quadrature-phase (IQ) imbalance in a front-end analog processing. In this paper, we propose a new IQ imbalance compensation method for OFDM systems. The proposed method estimates the IQ imbalance parameters using pilot signals inserted in frequency domain and then compensates the IQ imbalance effects based on the estimated parameter. The proposed method can be applied regardless of frequency-spacings of pilot signals and can compensate the IQ imbalance effect correctly.
Keywords :
OFDM modulation; compensation; error statistics; frequency-domain analysis; parameter estimation; BER; IQ imbalance parameter estimation; OFDM; bit error rate; frequency domain analysis; front-end analog processing; in-phase imbalance; novel IQ imbalance compensation method; orthogonal frequency division multiplex system; pilot signals; quadrature-phase imbalance; Bit error rate; Crosstalk; Demodulation; Equalizers; Frequency division multiplexing; Frequency domain analysis; Frequency estimation; OFDM modulation; Parameter estimation; Research and development;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
DOI :
10.1109/VTCF.2006.330
