Performance evaluation of PAPR reduction in multicarrier system by PTS and SLM methods

Day by day, there has been increasing demands for high speed wireless communication systems within both the private and public sectors. Wired channels are more contaminated than wireless data channels now a days so it is very difficult to preserve high QoS in wired channel therefore wired networks can´t sustain extension to wireless data networks. Within the constraint of finite frequency band resource, higher data speed is accomplished by new proficiency called in multicarrier modulation. Peak to average power ratio (PAPR) being a inevitable random variable in multicarrier system, but can be minimized by different techniques. An appropriate description of PAPR is its complementary cumulative distribution function (CCDF). Symbol scrambling technique scrambles each OFDM symbol with different scrambling sequences and select the sequence that gives the smallest PAPR value. In this paper the performance of two symbol scrambling techniques called selected mapping (SLM) and partial transmit sequence (PTS) are analyzed based on the characteristics of CCDF.