Investigations on PAPR Reduction using PTS Technique for OFDM Communication Systems

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a spectral efficient technique for high data rate communication systems. It also provides robustness to multipath frequency selective fading but suffers from high peak-to-average power ratio (PAPR) and causes high power amplifiers to operate in the nonlinear region. In this paper partial transmit sequence (PTS) as PAPR reduction technique has been investigated. Mathematical modelling and Matlab simulation have been carried out to analyse its performances. At 0.01 percent of CCDF, PAPR values for OFDM signal without applying any reduction technique are 11.5, 11.8, 12.0, 12.2 and 12.5 dB for 64, 128, 256, 512 and 1024 number of subcarriers respectively. Whereas with PTS technique with 16 number of sub blocks, the corresponding values are 6.4, 7.0, 7.6, 8.1, 8.4 and dB respectively. PTS method reduces the PAPR value by 4.1 dB than that of the OFDM signal with 1024 number of sub carriers.Orthogonal frequency division multiplexing (OFDM) is a spectral efficient technique for high data rate and Matlab simulation have been carried out to analyse its performances. At 0.01 percent of CCDF, PAPR values for OFDM signal without applying any reduction technique are 11.5, 11.8, 12.0, 12.2 and 12.5 dB for 64, 128, 256, 512 and 1024 number of subcarriers respectively. Whereas with PTS technique with 16 number of sub blocks, the corresponding values are 6.4, 7.0, 7.6, 8.1, 8.4 and dB respectively.  PTS method reduces the PAPR value by 4.1 dB than that of the OFDM signal with 1024 number of sub carriers.

Cite this Article

Shatrughna Prasad Yadav, Subhash Chandra Bera. Investigations on PAPR Reduction using PTS Technique for OFDM Communication Systems. Journal of Communication Engineering & Systems. 2015; 5(3): 19–26p.