Abstract: On the basis of studying the SLM(selected mapping) and PTS(partial transmit sequences) algorithms,a new algorithm named as subsection mapping is proposed and deduced to reduce the PAPR(peak to average power ratio) of OFDM(orthogonal frequency division multiplexing) signals. The main idea of subsection mapping is to divide the signal sequence intoseveral parts which are called subsequences. By controlling the power varianceof the subsequences the PAPR of the signal sequence can be restricted. The disadvantage of the subsection mapping is that the mapping table has to be stored inthe memory. After the theoretic deduction and numerical simulation, this new algorithm is proved to have better performance for reducing the PAPR of OFDM signals comparing to the SLM and PTS.

Key words: peak to average power ratio, selected mapping, partial transmit sequences, subsection mapping