OFDM peak-to-average power ratio, reduction by complement block coding scheme and its modified version

A new scheme is proposed to reduce the peak-to-average power ratio of OFDM signals and also to detect transmission errors. The proposed scheme is termed sub-block complement coding (SBCC). Performance results obtained with SBCC are given and compared with that of the standard complement block coding (CBC), cyclic coding (CC), simple block coding (SBC), modified simple block coding (MSBC) and simple odd parity code (SOPC) for the same purpose. The results show that, at the same coding rate 3/4, the proposed scheme can achieve almost the same performance as the cyclic code but with lower complexity. However, under the same coding rate, the PAPR reduction obtained by using SBCC is better than the rest schemes. The flexibility on choosing the coding rate and low complexity makes the proposed scheme SBCC more suitable for the large frame size with high coding rate and can provide error detection.