PAPR reduction of OFDM signals using iterative processing and carrier interferometry codes

Generally peak-to-average power ratio (PAPR) reduction imposes transmission performance degradation or system capacity reduction. This paper proposes a method for reducing the PAPR of OFDM signals by combining carrier interferometry (CI) spreading code and iterative processing (IP). The proposed method is capable of reducing the PAPR significantly while minimizing the bit error rate (BER) performance degradation. Computer simulation results prove the effectiveness of the proposed method. Further, the proposed method does not introduce out-of-band interference, which requires filtering whose complexity depends on the filtering requirement.