Concurrent dual-band digital predistortion based on canonical piecewise linear functions

Abstract

In the paper, experimental results of a novel dualband DPD model based on CPWL functions [4] are provided. With the feature of CPWL functions that is a minimal formulation requiring minimal amount of memory to store the parameters, the CPWL-based DPD model can release the requirement for huge number of coefficients for concurrent dual-band DPD systems. Our test results show the CPWL-based DPD model achieves similar performance as the GMP model ever it only has 15% of number of coefficients of the GMP model.