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Orthogonal polynomials have been considered as a powerful tool for power amplifier behavioral modeling and Digital Predistortion (DPD) linearization. The application of orthogonal polynomials was limited to SISO systems. This paper extends the idea to MIMO applications and demonstrates the linearization of 2×2 MIMO transmitters in the presence of RF crosstalk using matrix-based orthogonal polynomial...
This paper proposes a novel crossover digital predistorter (CO-DPD) model to compensate for crosstalk and nonlinearity in multiple-input multiple-output (MIMO) radio systems. Crosstalk can take place before or after the power amplifiers, designated herein as nonlinear and linear crosstalk, respectively. This paper demonstrates that, contrary to linear crosstalk, nonlinear crosstalk significantly affects...
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