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Modified PTS scheme technique based on number algorithm for OFDM system
(Altınbaş Üniversitesi / Lisansüstü Eğitim Enstitüsü, 2020) Alkatrani, Hayder Dhahir; Ilyas, Muhammad
The main problem in the OFDM communication system is the peak to average power ratio (PAPR). This makes the system in a band radiation and band distortion because of non-linearity of the high power amplifier (H.P). There are many ways to reduce the effect of this feature, among these methods that have been used are selective mapping, tone reservation, block coding, filtering, clipping and partial transmit sequence (PTS). In this paper a new algorithm has been proposed which is to use polygon numbers algorithm with conventional partial transmit sequence (C-PTS). This proposed algorithm processes the entered data before sending it, taking advantage of the number non-similarity according to the geometry of the number to prevent similar data successively from being sent directly via PTS, and thus this improved the level of PAPR rise in the proposed system. The amount of reduction in this way has reached more than 8dB.The best result we obtained was the amount of reduction between the conventional method and the proposed method is 4.5683 where N=64 . In addition, there is no transmission of side information, and this improves transmission efficiency. Finally, this method is easy in the calculation process and in the ciphering and deciphering of data, which adds a few calculations