Title :
Suitable MIMO-OFDM Decoders to Compensate IQ Imbalance
Author :
Tanabe, Yasuhiko ; Egashira, Yoshimasa ; Aoki, Tsuguhide ; Sato, Kazumi
Author_Institution :
Corporate Res. & Dev. Center, Toshiba Corp., Kawasaki
Abstract :
Imperfections in analog circuits are a serious obstacle to the realization of high data rate transmission for MIMO-OFDM systems. IQ imbalance is one such imperfection. The paper proposed a compensation scheme using a cascaded connection of MMSE and MLD, which applies MIMO decoding and compensation of IQ imbalance simultaneously. Computer simulations show that the proposed scheme can achieve almost the same performance as the conventional compensation scheme even though the computational complexity is reduced to about 1/3 of that of the conventional compensation scheme.
Keywords :
MIMO communication; OFDM modulation; codecs; compensation; MIMO-OFDM decoder; analog circuit imperfections; cascaded connection; compensation scheme; in-phase quadrature-phase imbalance; maximum likelihood detection; minimum mean square error; Analog circuits; Computer simulation; Costs; Decoding; MIMO; Maximum likelihood detection; OFDM modulation; Production; RF signals; Signal detection;
Conference_Titel :
Wireless Communications and Networking Conference, 2007.WCNC 2007. IEEE
Conference_Location :
Kowloon
Print_ISBN :
1-4244-0658-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2007.164
