APPR combined PTS technique for reduction of PAPR in OFDM systems

Abstract

High growth in multimedia based applications has increased the need for high data rates and bandwidth efficiency. Orthogonal Frequency division multiplexing (OFDM) is best choice in this regard which supports high data rates and bandwidth efficiency. As the number of subcarriers used in OFDM systems increases the data rates supported by it also increases at the cost of high Peak to average power ratio. The high PAPR leads to non-linearities in the system which is unwanted. Upcoming OFDM systems may drive the number of subcarriers used to meet the thrust of data rate demands. So it is required to alleviate the high PAPR that appear. Partial transmit sequence (PTS) is a technique for reduction in PAPR among other techniques. In this paper a method which combines both PTS and Adaptive Peak Power Reduction techniques (APPR). APPR uses an adaptive algorithm to maintain the peak level of modulated signal. In simulations this method shows the better reduction in PAPR and BER performance too.