Compensating the high power amplifier nonlinearity for a DVB-S2 system

Abstract

This paper deals with the compensation of High Power Amplifier induced nonlinear Inter-Symbol Interference (NISI) in a DVB-S2 receiver. The Volterra Canceller is an optimal technique if NISI is perfectly estimated. To reach this ideal case, a linearization of the received signal can be done before memory effects appears. In this work, this is achieved using a Laguerre polynomial linearizer. Computer simulations show that the combination of techniques reduces the average number of LDPC iterations thanks to an SNR improvement of 0.16 dB compare to a simple Volterra Canceller, without significant added complexity.