Capacity Achieving Modulations for the Peak-Power Limited Gaussian Channel

In this paper we propose new capacity achieving modulation schemes for the peak-power limited Gaussian channel. Applying a multilayer approach to continuous phase modulations (CPM), we obtain schemes whose capacity approaches the capacity of the AWGN channel while exhibiting a low peak to average power ratio (PAPR). Moreover, thanks to the structure of CPM, the nonlinear characteristic of the RF power amplifier can be efficiently compensated with slight additional complexity. We compare multilayer CPM with APSK modulations and observe improvements both in capacity and PAPR.