Performance of a Joint PAPR Reduction Clipping and Filtering (CF) Scheme and Predistortion Techniques in Amplify and Forward (AF) Relaying System with Relay Selection Strategy

The joint PAPR reduction and predistortion technique is the one solution to remove the nonlinear distortions of nonlinear high-power amplifier (HPA) and to increase the power efficiency. This paper can be used as a reference for the development of LTE network in future research. In this paper, we implement this joint technique at source and the predistortion technique at relay to improve the performance of cooperative communication networks amplify and forward (AF) relaying system from nonlinear distortion which are produced by HPA at source. And the relay selection strategy is used when the system is implemented in multy relay scheme. Iterative Clipping and Filtering (ICF) scheme and the cascade connection of Wiener-Hammerstein is used as the PAPR reduction and the predistortion-HPA model at source to build the joint technique. To improve the system’s performance at the relays are implemented the predistortion technique to compensate the nonlinear characteristics of memoryless non- PA with Rapp model. The system’s performance is expressed in bit error probability. From simulation results are shown that the ICF PAPR technique decreases BER performance if its CR value is low, while the predistortion technique in the joint scheme at source gives an improvement system’s performance about 4,35 dB or 15,82% at BER 10-5. Besides the predistortion technique at source, implementation of the predistortion technique at relay also gives improvement to the system’s performance and the implementation of predistortion technique both at source and at relay is shown give the best performance. Also, the applications of the relay selection strategy in more relay numbers give better performances.