Authors : Junsu Kim, Su Min Kim and Sukhyun Seo
Abstract: Full Duplex Relaying (FDR) is a promising wireless relaying technique which extends system throughput considerably by transmitting data while receiving at the same time. However, the performance of FDR system is limited by the self-interference induced from the transmitting part in the same device. Hence, Kim et al. proposed buffer-aided FDR system based on Cognitive Radio (CR) technique which can minimize the self-interference using underlay CR technique. It has been shown that the proposed FDR scheme based on CR technique can overwhelm the conventional FDR systems in terms of system throughput. In this study, we first investigate the optimal performance of the FDR system proposed and show how optimal value of interference temperature which is a tuning parameter of the underlay CR technique, maximizes the system throughput. Further, we propose a practical adaptive interference temperature adjustment algorithm which achieves near-optimal throughput performance.
Junsu Kim, Su Min Kim and Sukhyun Seo, 2018. Optimal Power Adjustment Algorithm for Buffer-Aided Full Duplex Relay with Cognitive Radio Technique. Journal of Engineering and Applied Sciences, 13: 3159-3163.