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Compensation for HPA nonlinearity and I/Q imbalance in MIMO beamforming systems

Qi, J. and Aissa, S. (2010) Compensation for HPA nonlinearity and I/Q imbalance in MIMO beamforming systems. In: 2010 IEEE 6th International Conference on Wireless and Mobile Computing, Networking and Communications. IEEE, pp. 78-82. ISBN 9781424477432

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To link to this item DOI: 10.1109/WIMOB.2010.5644865


In this paper, we investigate the effects of high-power amplifier (HPA) nonlinearity and in-phase and quadrature-phase (I/Q) imbalance on the performance of multiple-input multiple-output (MIMO) transmit beamforming (TB) systems. Specifically, we propose a compensation method for HPA nonlinearity and I/Q imbalance together in MIMO TB systems. The performance of the MIMO TB system under study is evaluated in terms of the average symbol error probability (SEP) and system capacity, considering transmission over uncorrelated frequency-flat Rayleigh fading channels. Numerical results are provided and show the effects of several system parameters, such as the HPA parameters, image-leakage ratio, numbers of transmit and receive antennas, length of pilot symbols, and modulation order of phase-shift keying (PSK), on performance.

Item Type:Book or Report Section
ID Code:33448
Uncontrolled Keywords:MIMO transmit beamforming systems; frequency-flat Rayleigh fading channels; high-power amplifier nonlinearity; image-leakage ratio; in-phase quadrature-phase imbalance; phase-shift keying; pilot symbols; receive antennas; symbol error probability; system capacity; transmit antennas; array signal processing; fading; MIMO; radio frequency; receiving antennas; signal to noise ratio

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