Efficient PAPR for OFDM and CI/OFDM systems with iterative clipping

This paper proposes a design framework based on efficient peak-to-average power (PAPR) for orthogonal frequency division multiplexing (OFDM) and carrier interferometry OFDM (CI/OFDM) systems with iterative clipping. In this paper, we utilize the efficient PAPR which is defined as the PAPR minimizing the total degradation (TD) to determine the optimum clipping ratio (CR) considering the effects of clipping and a solid state PA (SSPA). We evaluate the TD of OFDM and CI/OFDM systems with iterative clipping with comparing the performance by those systems without clipping. For QPSK symbols it is found that the efficient PAPR is 6 dB and TD gain compared with the system without iterative clipping is 1.3 dB in OFDM systems. Further gain can be obtained for CI/OFDM systems, that is, efficient PAPR is 4 dB and the TD gain is 3.2 dB.