Joint Power Allocation Optimization of cooperative communication systems with Non-Orthogonal Multiple Access
(دانشگاه صنعتی نوشیروانی بابل )
دانشگاه صنعتی نوشیروانی بابل
Non-orthogonal multiple access,
power allocation. ,
In this paper, a downlink network with two users as transmitter and relay, respectively, and a central station as a receiver is considered. The aim is to determine the optimal coefficient of non-orthogonal signal symbols and the optimal power allocation in the source-relay in order to maximize the average total rate in a cooperative communication system using the non-orthogonal multiple access technique. To achieve these goals, the average total rate of the cooperative communication system with non-orthogonal multiple access with decode and forward relay in the independent Rayleigh channel was calculated. Then, in the first step, the optimization problem of the non-orthogonal symbols coefficient is mathematically expressed for each power allocation and a closed form solution is proposed. In the second step, the power allocation optimization for the source-relay was introduced and solved. Finally, the joint optimization problem of the non-orthogonal symbols coefficient and power allocation is investigated and an algorithm proposed for the joint optimization problem. The proposed algorithm shows that the joint optimization of the non-orthogonal symbols coefficient and power allocation achieve a higher average rate than the separate optimization of each of these parameters. Also, simulations and numerical results are presented to confirm the theoretical equation, where the simulations show the 3 dB gain for the optimized system using the proposed algorithm compared to the non-optimized system.
 Amiriara, H. , Zahabi, M. R., & Meghdadi, V. (2018, December). Joint Power and Location Optimization of Relay for Amplify-and-Forward Cooperative Relaying. In 2018 International Conference on Internet of Things, Embedded Systems and Communications (IINTEC) (pp. 97-102). IEEE.
 Amiriara, H. , Zahabi, M. R., & Meghdadi, V. (2020). Joint power-location optimization in AF cooperative relay systems with Nakagami-m channel. Physical Communication, 101067.
 Seo, J. B., Jin, H., Joung, J., & Jung, B. C. (2020). Uplink NOMA Random Access Systems With Space–Time Line Code. IEEE Transactions on Vehicular Technology, 69(4), 4522-4526.
 Kim, J. B., & Lee, I. H. (2015). Capacity analysis of cooperative relaying systems using non-orthogonal multiple access. IEEE Communications Letters, 19(11), 1949-1952.
 Zeng, M., Hao, W., Dobre, O. A., & Ding, Z. (2020). Cooperative NOMA: State of the Art, Key Techniques, and Open Challenges. IEEE Network, 34(5), 205-211.
 Do, D. T., & Nguyen, T. T. T. (2018). Exact Outage Performance Analysis of Amplify-and-Forward-Aware Cooperative NOMA. TELKOMNIKA Telecommunication Computing Electronics and Control, 16(5), 1966-1973.
 Liu, H., Ding, Z., Kim, K. J., Kwak, K. S., & Poor, H. V. (2018). Decode-and-forward relaying for cooperative NOMA systems with direct links. IEEE Transactions on Wireless Communications, 17(12), 8077-8093.
 Wang, Z., & Peng, Z. (2019). Secrecy performance analysis of relay selection in cooperative NOMA systems. IEEE Access, 7, 86274-86287.
 Zou, D., Deng, D., Rao, Y., Li, X., & Yu, K. (2019). Relay selection for cooperative NOMA system over correlated fading channel. Physical Communication, 35, 100702.
 Ghous, M., Abbas, Z. H., Abbas, G., Hassan, A. K., & Moinuddin, M. (2020). Transmit beamformer based performance analysis and diversity gains of cell edge user in cooperative MISO-NOMA system. Physical Communication, 101102.
 Xu, M., Ji, F., Wen, M., & Duan, W. (2016). Novel receiver design for the cooperative relaying system with non-orthogonal multiple access. IEEE Communications Letters, 20(8), 1679-1682.
 Kader, M. F., & Shin, S. Y. (2016). Cooperative relaying using space-time block coded non-orthogonal multiple access. IEEE Transactions on Vehicular Technology, 66(7), 5894-5903.
 Jeffrey, A., & Zwillinger, D. (Eds.). (2007). Table of integrals, series, and products. Elsevier.
 Chatzigeorgiou, I. (2013). Bounds on the Lambert function and their application to the outage analysis of user cooperation. IEEE Communications Letters, 17(8), 1505-1508.
 Gilbert, G. T. (1991). Positive definite matrices and Sylvester's criterion. The American Mathematical Monthly, 98(1), 44-46.