Abstract
Power amplifier (PA) nonlinearity has been one of the crucial constraints to the performance of radio frequency (RF) communication systems. The distortion caused by amplitude-phase modulation (APM) results in severe performance degradation. In this paper, we study the effect of PA nonlinear distortion on bit error performance in Multiple-Input Multiple-Output (MIMO) wireless communication systems, and develop a new method based on Support Vector Regression (SVR) to compensate the nonlinear distortion. Under the condition that the receiver has no knowledge of PA distortion parameters, we propose a receiver compensation technique which involves estimating the points of the distorted AM-AM curve based on training using SVR. The proposed scheme can realize a model-free estimation. Simulation results show that, for \(4 \times 4\) MIMO with 16-QAM, the proposed scheme is effective to deal with the nonlinear distortion caused by PAs.
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