Abstract
In this paper, DCT-and FFT-based constant envelope multicarrier systems with M-PAM mapper are considered. The phase modulation used in these systems to achieve constant envelope results in 0 dB PAPR thereby permitting high power amplifiers to operate with maximum power efficiency. Closed-form expressions for bit error rate are derived for both systems for Rayleigh and Rician fading channels. It is noted that constant envelope DCT-based OFDM system outperforms in terms of bit error rate corresponding to FFT-based OFDM system. Also, it is shown that theoretical bit error rate is nearly the same as that of simulation results, particularly for small values of modulation index at all SNRs.