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2022-09-13

A Modified Magnitude-Selective Affine Function-Based Behavioral Digital Predistortion for Power Amplifiers in MIMO Systems

By Haopu Shen, Cuiping Yu, Ke Tang, and Yuan'an Liu
Progress In Electromagnetics Research Letters, Vol. 106, 111-119, 2022
doi:10.2528/PIERL22060208

Abstract

In this paper, a modified magnitude-selective affine function-based behavioral model is proposed for the linearization of power amplifiers in multiple-input multiple-output (MIMO) systems. In this model, high-order polynomials in the crossover memory polynomial (COMPM) are replaced by magnitude-selective affine functions to compensate for the crosstalk and nonlinear distortion, leading to a highly efficient hardware implementation. The performance of the model is validated using two 3-carrier long-term evolution (LTE) signals of 20 MHz bandwidth. Experimental results show that the proposed model can achieve nearly the same adjacent channel power ratio (ACPR) and normalized mean square error (NMSE) as COMPM with about 70% reduction of hardware complexity.

Citation


Haopu Shen, Cuiping Yu, Ke Tang, and Yuan'an Liu, "A Modified Magnitude-Selective Affine Function-Based Behavioral Digital Predistortion for Power Amplifiers in MIMO Systems," Progress In Electromagnetics Research Letters, Vol. 106, 111-119, 2022.
doi:10.2528/PIERL22060208
http://jpier.org/PIERL/pier.php?paper=22060208

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