Reducing peak-to-average power ratio (PAPR) using partial transmit sequence in OFDM systems

Abstract

OFDM is a multicarrier system supporting high data rate transmission and generally requires no equalization at the receiver, making it simple and efficient. However, a drawback of this system is the large peak-to-average-power ratio (PAPR) of the transmit signal, which makes its straightforward implementation quite costly. There are several techniques to attack this problem, but most of them are suited for specific applications or small numbers of subcarriers. Selected mapping (SLM) is one of these; however, this method becomes inefficient, if the number of subcarriers or the vector-size is large. The partial transmit sequence (PTS) method was proposed as an improved strategy to tackle the problem. In this work, four variants of PTS, in terms of subblock partitioning, are discussed and the results of the implementations are presented.