Peak to average power ratio reduction in OFDM using higher order partitioned PTS sequence and Bose Chaudhuri Hocquenghem Codes

Orthogonal frequency division multiplexing (OFDM), also known as multi-carrier modulation scheme, is an attractive technology for upcoming communication system, to enhance data rate, higher spectral efficiency and better quality of service (QOS). In OFDM, first higher data stream has been divided into lower data streams and after modulation these data streams are together transmitted by orthogonal sub-carriers. Due to orthogonal nature of sub-carriers proper utilization of bandwidth is achieved along with reduced cost of OFDM communication system. A major challenge in OFDM system is its higher Peak to Average Power ratio (PAPR), which degrades system efficiency. Due to larger PAPR, High power amplifier (HPA) starts to operate in non linear region hence distortion introduced in transmitted data. In this paper, combination of higher order partitioned partial transmitted sequence (PTS) along with Bose Chaudhuri Hocquenghem Code (BCH), have been proposed to diminish the PAPR significantly. This proposed scheme is used to minimize PAPR by choosing the signal which is having less PAPR among many signals. At transmitter side, scrambling process uses Coset leader of Bose Chaudhuri Hocquenghem Codes (BCH) and syndrome decoding method to recover the transmitted sequence are being used at receiver side. Finally, MATLAB (Matrix Laboratory) simulation results reveals that our improved PTS technique has better performance in reducing PAPR as compare to conventional OFDM system and existing PTS techniques.