Title :
I/Q imbalance mitigation for STBC MIMO-OFDM communication systems
Author :
Cao, Mingzheng ; Ge, Hongya
Author_Institution :
Dept. of ECE, New Jersey Inst. of Technol., Newark, NJ
fDate :
March 31 2008-April 4 2008
Abstract :
In this work we study the performance degradation caused by the in-phase/quadrature (I/Q) imbalance in space-time block coded (STBC) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) communication systems. The 2-Tx Alamouti scheme, 4-Tx quasi- orthogonal STBC (QOSTBC) scheme, and 4-Tx rotated QOSTBC (RQOSTBC) scheme with I/Q imbalance are examined in details. Our study shows that I/Q imbalance causes severe distortion in STBC MIMO-OFDM systems. By exploiting the structure of the received signal, low-complexity solutions are developed to mitigate the resultant distortion successfully.
Keywords :
MIMO communication; OFDM modulation; block codes; modulation coding; orthogonal codes; space-time codes; transceivers; 2-Tx Alamouti scheme; 4-Tx quasiorthogonal STBC scheme; 4-Tx rotated QOSTBC scheme; QOSTBC scheme; RQOSTBC scheme; STBC MIMO-OFDM communication systems; in-phase imbalance; multiple-input multiple-output systems; orthogonal frequency division multiplexing; performance degradation; quadrature imbalance; space-time block code; transceiver I/Q imbalance mitigation; Baseband; Fading; MIMO; Maximum likelihood decoding; OFDM; Signal processing; Space technology; Transceivers; Transmitting antennas; Wireless communication; I/Q imbalance; MIMO; OFDM; STBC;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518304
