Analytical characterization of nonlinearly distorted TC-OQAM signals

Abstract

Based on nonlinear OQPSK (Offset Quadrature Phase Shift Keying) format it is possible to define a wide class of TC-OQAM signals (Trellis Coded-Offset Quadrature Amplitude Modulation) with good gains. This paper investigates nonlinear effects in TC-OQAM signals, taking advantage of the the nonlinear OQPSK format. This allows an analytical characterization of the transmitted signals when affected by nonlinear devices such as those inherent to a nonlinear power amplification, which can be used for obtaining the PSD (Power Spectral Density) of the transmitted signals, the design of the optimum receiver as the corresponding performance.