Dynamic selected mapping for OFDM

Orthogonal frequency division multiplexing (OFDM) transmission systems generally have low power efficiency, due to the large peak-to-average power ratio (PAR) of the OFDM signal. Selected mapping (SLM) is a promising technique to reduce the PAR for OFDM. A drawback of SLM is its high computational requirement, which hinders its practical implementation. In this paper, we propose a dynamic, two-buffer structure to reduce the computational requirement without sacrificing the PAR reduction capability. Performance analysis and simulations of the proposed technique are also carried out.