Peak-to-Average Power Ratio Analysis of DC-OFDM Signals and Its Reduction Method

In this paper, a statistical analysis of peak-to-average power ratio (PAPR) for complex-value OFDM signals and real-value OFDM signals using differential coding (DC) is presented. DC-OFDM has the good performance of compressing intercarrier interference (ICI) at the cost of high PAPR. Adjacent partial transmit sequence (PTS) is a proper method to reduce the PAPR of DC-OFDM. The simulation results show that the theoretic analysis is very close to experimental result. The complex-value DC-OFDM system exhibits near 2dB PAPR higher than the same type normal OFDM. PTS with V=4 can reduce the PAPR of DC-OFDM to the normal complex-value OFDM level.