A low complexity crossover digital predistorter for compensation of nonlinear effects and crosstalk in 2×2 SFBC OFDM systems

This paper proposes a low complexity crossover digital predistorter (CO-DPD) to compensate the nonlinear effects due to the power amplifier (PA) and crosstalk interference in a 2×2 space frequency block code (SFBC) orthogonal frequency division multiplexing (OFDM) systems. The computational complexity of both conventional CO-DPD and our low complexity CO-DPD is computed and compared. We evaluate the performance in terms of bit error rate (BER), total degradation (TD) and power spectral density (PSD) in simulations. Simulation results show that our low complexity CO-DPD has comparable performance with conventional CODPD.