On Achievable Rate of Multicarrier with Practical High Power Amplifier

This paper investigates the achievable rate of multicarrier systems with non-linear distortion caused by high power amplifier (HPA) at the transmitter. We derive mutual information expressions for several non-linear models of HPA. Specific results are given for different values of the input backoff. It is shown that for some cases, linearization of HPA is not the best strategy.