I/Q Imbalance in Multiple Beamforming OFDM Transceivers: SINR Analysis and Digital Baseband Compensation

被引:36
作者
Oezdemir, Oezgur [1 ]
Hamila, Ridha [1 ]
Al-Dhahir, Naofal [2 ]
机构
[1] Qatar Univ, Dept Elect Engn, Doha, Qatar
[2] Univ Texas Dallas, Dept Elect Engn, Dallas, TX 75230 USA
关键词
Multiple beamforming; MIMO; OFDM; I/Q imbalance; SINR; CARRIER FREQUENCY OFFSET; DIVERSITY SYSTEMS; IQ IMBALANCES; MIMO-OFDM; RECEIVERS;
D O I
10.1109/TCOMM.2013.021913.120321
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, we start by investigating the impact of joint transmit-receive I/Q imbalance on the performance of direct-conversion beamforming OFDM transceivers. We derive a new analytical expression for the average subcarrier SINR of the I/Q imbalance-ignorant beamformer in terms of the I/Q imbalance level at both the transmit and receive sides, the size of the beamforming array, and the input SNR level. This expression motivates the need for I/Q imbalance compensation and provides valuable design insights when examining several special and limiting cases. Next, we derive the throughput-maximizing multiple beamforming transmit/receive coefficients under a general system model with an asymmetric frequency-dependent (FD) joint transmit-receive I/Q imbalance. In addition, we propose a low-complexity pilot-aided scheme for the estimation of the channel and I/Q imbalance parameters. Our simulation results demonstrate that the proposed generalized multiple beamforming scheme is highly effective in mitigating I/Q imbalance effects at practical complexity levels.
引用
收藏
页码:1914 / 1925
页数:12
相关论文
共 29 条
[1]  
[Anonymous], 2008, 36101 3GPP TR
[2]  
[Anonymous], 2003, Introduction to SpaceTime Wireless Communications
[3]  
Cover T.M., 2006, ELEMENTS INFORM THEO, V2nd ed
[4]   Gain, phase imbalance, and phase noise effects on error vector magnitude [J].
Georgiadis, A .
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2004, 53 (02) :443-449
[5]  
Golub G. H., 1996, MATRIX COMPUTATIONS
[6]  
Gomaa A., P 2011 IEEE GLOB
[7]   Exact SINR Analysis of Wireless OFDM in the Presence of Carrier Frequency Offset [J].
Hamdi, Khairi Ashour .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2010, 9 (03) :975-979
[8]  
Kay S., 1993, Fundamentals of statistical processing, volume I: estimation theory, VI
[9]  
Lee J, 2006, IEEE T WIREL COMMUN, V5, P3360, DOI [10.1109/TWC.2006.256956, 10.1109/TWC.2006.04867]
[10]   Impact of Transceiver I/Q Imbalance on Transmit Diversity of Beamforming OFDM Systems [J].
Maham, Behrouz ;
Tirkkonen, Olav ;
Hjorungnes, Are .
IEEE TRANSACTIONS ON COMMUNICATIONS, 2012, 60 (03) :643-648