A novel PTS architecture for PAPR reduction of OFDM signals

Orthogonal frequency division multiplexing (OFDM) is an attractive technique for modern wireless communication. However, high peak-to-average power ratio (PAPR) of the transmitted signal is a major disadvantage of OFDM. So far, numerous approaches have focused on the PAPR reduction. As one of these approaches, partial transmit sequence (PTS) is effective and uncomplicated. This paper presents a novel PTS architecture for PAPR reduction of OFDM Signals, and the architecture can implement FFT/IFFT operation and control the PAPR of the transmit signal. Because of the delay feedback and the data scheduling approaches in IFFT architecture, the hardware costs of the memories, complex multipliers, complex adders, and ROM respectively are reduced by 75.6%, 44.0%, 28.6%, and 75.0% compared to the R23SDF multiple processor approach. Moreover, the operation time of IFFT is reduced by 75% compared to the grouping approach by reordering the frequency-domain sequences. Additionally, the number of operated candidates can be reduced from 64 to 16 through searching effective phase factors.