Title :
A Novel IQ Imbalance Estimation Scheme using Transient Local Frequency for OFDM Systems
Author :
Tanabe, Yasuhiko ; Egashira, Yoshimasa ; Sato, Kazumi
Author_Institution :
Toshiba Corp., Kawasaki
Abstract :
Imperfections in analog circuits are a serious obstacle to the realization of high data rate transmission for OFDM systems. IQ imbalance is one such imperfection. We propose an IQ imbalance estimation scheme with transient local oscillator frequency, which is different from center frequency of transmit signal, to correct the IQ imbalance of the receiver in the time domain. Computer simulations show that the proposed scheme can achieve almost the same performance as that without IQ imbalance.
Keywords :
OFDM modulation; fading channels; intersymbol interference; radio receivers; time-domain analysis; IQ imbalance estimation; OFDM system; fading channel; high data rate transmission; intersymbol interference; receiver IQ imbalance; time domain analysis; transient local oscillator frequency; Analog circuits; Computer simulation; Costs; Frequency estimation; Local oscillators; OFDM; Production; RF signals; Radio transmitters; Receiving antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394317
