DefinePK

Abstract

A hybrid method for reducing Peak-to-Average Power Ratio (PAPR) in multi-carrier systems such as Orthogonal Frequency Division Multiplexing (OFDM) by a combination of the partial transmit sequence (PTS) technique and cascade clipping peak amplifying bottom (CCPAB) method is proposed in this study. The PTS approach is a widely accepted method for improving PAPR statistics. CPAB is process to be performed by clipping peaks and amplifying bottoms of OFDM signal by controlling thresholds A and B. However, a combination of PTS and CPAB to carry out a new hybrid PTS-CCPAB approach at Transmitter side requires a balance of the reduction level to the performance of PAPR reduction. Too much reduction in PAPR leads to degradation of the transmitted signal. PAPR decreases by reducing A and increasing B, but at the expense of signal power. IEEE 802.11a system parameters are used in the computer simulation tests, which show that the controlling is possible for the reduction to realize the acceptable PAPR performance. The PTS-CCPAB is a guaranteed method to achieve the desired level of the PAPR reduction. Therefore, the proposed method improves system performance regarding PAPR reduction and capabilities to be used for OFDM.