Flexible Behavioral Model for Multi-Antenna Transmitters with Low Complexity

This paper proposes a hybrid dual-input model (HDI) to linearize multi-antenna transmitters with antenna crosstalk. Proposed model reduces model complexity by decomposing the overall nonlinearity of the system into the PA part, the crosstalk part and modeling them separately. Based on the dual-input (DI) model, it selects some terms of DI model appropriately to model more accurately. The performance of proposed model is better than the DI model and can compare with the dual-input canonical piecewise-linear (DI-CPWL) model. Measurement results of a two-antenna transmitter show that the HDI model requires fewer coefficients than the dual-input model and DI-CPWL model.