An improved SLM cascade with iterative TR method for PAPR reduction in OFDM system

Abstract

In this paper, we propose an improved selective mapping (SLM) cascaded with iterative tone reservation (TR) method for peak-to average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) system. In the simple SLM cascaded with iterative TR method, the candidate signal which has the minimum PAPR is selected. However, since the number of iteration L of the largest peak values will be reduced by TR, in the proposed method, the candidate signal which has the minimum (L+1)th peak to average power ratio is selected among other candidates in the SLM process. From the performance comparisons between various PAPR reduction methods, we verified that the PAPR reduction performance of the proposed method achieves the better reduction performance and power efficiency.