Title :
I/Q imbalance in MIMO STBC communication systems: Impact and solution
Author :
Cao, Mingzheng ; Ge, Hongya
Author_Institution :
Dept. of ECE, New Jersey Inst. of Technol., Newark, NJ
Abstract :
In this work we study the performance degradation caused by the in-phase/quadrature (I/Q) imbalance of the transceivers in multiple-input multiple-output (MIMO) space-time block coded (STBC) communication systems. The 2-Tx orthogonal STBC (OSTBC) systems, 4-Tx quasi-orthogonal STBC (QOSTBC) systems, and 4-Tx rotated QOSTBC (RQOSTBC) systems in the presence of I/Q imbalance are studied in detail. Our work shows that I/Q imbalance causes severe distortion in MIMO STBC communication systems. By exploiting the structure of the received signal, low-complexity solutions are proposed to mitigate the distortion caused by I/Q imbalance successfully.
Keywords :
MIMO communication; distortion; orthogonal codes; space-time codes; MIMO STBC communication system; distortion; in-phase/quadrature imbalance; multiple-input multiple-output sustem; orthogonal STBC system; quasi orthogonal STBC system; space-time block codes; Baseband; MIMO; Maximum likelihood decoding; Parameter estimation; Performance analysis; Signal processing; Transceivers; Transmitters; Transmitting antennas; Wireless communication;
Conference_Titel :
Military Communications Conference, 2008. MILCOM 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2676-8
Electronic_ISBN :
978-1-4244-2677-5
DOI :
10.1109/MILCOM.2008.4753223
