Application of Sequential Monte Carlo to M-QAM Schemes in the Presence of Nonlinear Solid-State Power Amplifiers

Abstract

This paper presents a sequential Monte Carlo (SMC) framework in order to compensate for the nonlinear distortion caused by solid-state power amplifiers (SSPA) in M-QAM schemes. The performance of this new approach is shown for low and high-order constellation schemes for different values of input backoff (IBO). The results reveal that, in low-IBO regimes, the SMC method shows a significant improvement, relative to the conventional methods where the predistorter is used before the amplifier, especially for high order constellations. Moreover, the SMC method is shown to have more robust behavior to the constellation scaling. Finally, an adaptive sequential Monte Carlo receiver is proposed that adapts itself efficiently to variations in amplifier parameters.