Throughput Maximization in MIMO Cognitive Radio Networks with SWIPT DF Relay and Imperfect CSI

Document Type : Original Article


Department of Electrical and Computer Engineering, Babol Noshirvani University of Technology, Babol, Iran.


We address the throughput maximization problem for downlink transmission in DF-relay-assisted cognitive radio networks (CRNs) based on simultaneous wireless information and power transfer (SWIPT) capability. In this envisioned network, multiple-input multiple-output (MIMO) relay and secondary user (SU) equipment are designed to handle both radio frequency (RF) signal energy harvesting and SWIPT functional tasks. Additionally, the cognitive base station (CBS) communicates with the SU only via the MIMO relay. Based on the considered network model, several combined constraints of the main problem complicate the solution. Therefore, in this paper, we apply heuristic guidelines within the convex optimization framework to handle this complexity. First, consider the problem of maximizing throughput on both sides of the relay separately. Second, each side progresses to solve the complex problem optimally by adopting strategies for solving sub-problems. Finally, these optimal solutions are synthesized by proposing a heuristic iterative power allocation algorithm that satisfies the combinatorial constraints with short convergence times. The performance of the optimal proposed algorithm (OPA) is evaluated against benchmark algorithms via numerical results on optimality, convergence time, constraints’ compliance, and imperfect channel state information (CSI) on the CBS-PU link.


Main Subjects

[1] Xu, G. Gui, H. Gacanin, F. Adachi, “A survey on resource allocation for 5G heterogeneous networks: Current research, future trends, and challenges”, IEEE Communications Surveys & Tutorials, vol. 23, no. 2, pp. 668-695, 2021.
[2] C. Liang, Y. Zeng, E.C. Peh, A.T. Hoang, “Sensing-throughput tradeoff for cognitive radio networks”, IEEE transactions on Wireless Communications, vol. 74, no. 4, pp. 1326-1337, 2008.
[3] Hasegawa, H. Hirai, K. Nagano, H. Harada, K. Aihara, “Optimization for centralized and decentralized cognitive radio networks”, Proceedings of the IEEE, vol. 102, no. 4, pp. 574-584, 2014.
[4] Na, Y. Wang, X. Li, J. Xia, X. Liu, M. Xiong, W. Lu, “Subcarrier allocation based simultaneous wireless information and power transfer algorithm in 5G cooperative OFDM communication systems”, Physical Communication, vol. 29, pp. 164-170, 2018.
[5] Lu, P. Wang, D. Niyato, E. Hossain, “Dynamic spectrum access in cognitive radio networks with RF energy harvesting”, IEEE Wireless Communications, vol. 21, no. 3, pp. 102-110, 2014.
[6] Park, H. Kim, D. Hong, “Optimization for centralized and decentralized cognitive radio networks”, Proceedings of the IEEE, vol. 12, no. 3, pp. 1386-1397, 2013.
[7] Zhang, C.K. Ho, “MIMO broadcasting for simultaneous wireless information and power transfer”, IEEE Transactions on Wireless Communications, vol. 12, no. 5, pp. 1989-2001, 2013.
[8] Benkhelifa, A.S. Salem, M.S. Alouini, “Rate maximization in MIMO decode-and-forward communications with an EH relay and possibly imperfect CSI”, IEEE Transactions on Communications, vol. 64, no. 11, pp. 4534-4549, 2016.
[9] Yan, Y. Liu, “A dynamic SWIPT approach for cooperative cognitive radio networks”, IEEE Transactions on Vehicular Technology, vol. 66, no. 12, pp. 11122-11136, 2017.
[10] Chatterjee, S.P. Maity, T. Acharya, “Energy-spectrum efficiency trade-off in energy harvesting cooperative cognitive radio networks”, IEEE Transactions on Cognitive Communications and Networking, vol. 5, no. 2, pp. 295-303, 2019.
[11] Tse, P. Viswanath, “Fundamentals of wireless communication”, Cambridge university press, 2005.
[12] Mishra, G.C. Alexandropoulos, “Jointly optimal spatial channel assignment and power allocation for MIMO SWIPT systems”, IEEE Wireless Communications Letters, vol. 7, no. 2, pp. 214-217, 2017.
[13] Soleimanpour-Moghadam, S. Talebi, “Relay selection and power allocation for energy-efficient cooperative cognitive radio networks”, Physical Communication, vol. 28, pp. 1-10, 2018.
[14] Huang, W. Tu, “A high-throughput wireless-powered relay network with joint time and power allocations”, Computer Networks, vol. 160, pp. 65-76, 2019.
[15] Wang, G. Wang, B. Li, Z. Lin, H. Wang, G. Chen, “Optimal power splitting for MIMO SWIPT relaying systems with direct link in IoT networks”, Physical Communication, vol. 43, pp. 101169, 2020.
[16] Gautam, E. Lagunas, S. Chatzinotas, B. Ottersten, “Relay selection and resource allocation for SWIPT in multi-user OFDMA systems”, IEEE Transactions on Wireless Communications, vol. 18, no. 5, pp. 2493-2508, 2019.
[17] Malik, M. Vu, “Optimal transmission using a self-sustained relay in a full-duplex MIMO system”, IEEE Journal on Selected Areas in Communications, vol. 37, no. 2, pp. 374-390, 2018.
[18] Li, H. Cao, Y. Rong, T. Su, G. Yang, Z. He, “Transceiver optimization for DF MIMO relay systems with a wireless powered relay node”, IEEE Access, vol. 7, pp. 56904-56919, 2019.
[19] Benkhelifa, A.S. Salem, M.S. Alouini, “Sum-rate enhancement in multiuser MIMO decode-and-forward relay broadcasting channel with energy harvesting relays”, IEEE Journal on Selected Areas in Communications, vol. 37, no. 12, pp. 3675-3684, 2016.
[20] Golipour, R. Ghazalian, S.M.H Andargoli, “Throughput maximization method for SWIPT DF multi-relaying network with low computational complexity”, Physical Communication, vol. 47, pp. 101378, 2021.
[21] Shirvani Moghaddam, “Outage analysis of energy harvested relay-aided device-to-device communications in Nakagami channel”, Journal of Communications Software and Systems, vol. 14, no. 4, pp. 302-311, 2018.
[22] H. Abd El-Malek, M.A. Aboulhassan, M.A. Abdou, “Power allocation scheme and performance analysis for multiuser underlay full-duplex cognitive radio networks with energy harvesting”, IEEE Access, vol. 6, pp. 59031-59042, 2018.
[23] Lee, R. Zhang, “Cognitive wireless powered network: Spectrum sharing models and throughput maximization”, IEEE Transactions on Cognitive Communications and Networking, vol. 1, no. 3, pp. 335-346, 2015.
[24] Kim, H. Lee, C. Song, T. Oh, I. Lee, “Sum throughput maximization for multi-user MIMO cognitive wireless powered communication networks”, IEEE Transactions on Wireless Communications, vol. 16, no. 2, pp. 913-923, 2016.
[25] Askari, V.T. Vakili, “Robust Beamforming and Power Allocation in CR MISO Networks with SWIPT to Maximize the Minimum Achievable Rate”, Wireless Personal Communications, vol. 106, no. 2, pp. 927-954, 2019.
[26] Mohammadi, S.M.H. Andargoli, “Sum throughput maximization for downlink MIMO-OFDMA based cognitive radio networks in spectrum overlay model”, In 8th International Symposium on Telecommunications (IST), September 2016, Iran, Tehran, pp. 72-77.
[27] Mohammadi, S.M.H. Andargoli, “Power optimization and subcarrier allocation for downlink MIMO-OFDMA based cognitive radio networks”, Wireless Networks, vol. 24, no. 6, pp. 2221-2235, 2018.
[28] Mohammadi, S.M.H. Andargoli, “Resource allocation algorithm for downlink MIMO‐OFDMA based cognitive radio networks in spectrum underlay scenario”, IET Communications, vol. 14, no. 11, pp. 1811-1820, 2020.
[29] Eidzadeh, R. Ghazizadeh, M. Hadi, “Joint resource allocation and position optimization in NOMA-based multi-UAV wireless communication networks”, Tabriz Journal of Electrical Engineering, vol. 51, no. 3, pp. 327-336, 2022.
[30] Adli Mehr, J. Musevi Niya, N. Akar, “A multi-rate queue management for delay-constrained non-orthogonal multiple access (NOMA) based secure cognitive radio network”, Tabriz Journal of Electrical Engineering, vol. 51, no. 2, pp. 149-159, 2021.
[31] M. Hoang, X.N. Tran, N. Thanh, L.T. Dung, “Performance analysis of MIMO SWIPT relay network with imperfect CSI”, Mobile Networks and Applications, vol. 24, pp. 630-642, 2019.
[32] Alibeigi, S.S. Moghaddam, “Sum-rate optimization constrained by consumed power for multi-antenna non-regenerative relay network”, International Journal of Sensors Wireless Communications and Control, vol. 10, no. 2, pp. 143-152, 2020.
[33] Wang, J. Zhang, A. Host-Madsen, “On the capacity of MIMO relay channels”, IEEE Transactions on Information theory, vol. 51, no. 1, pp. 29-43, 2005.
[34] Lu, G.Y. Li, A.L. Swindlehurst, A. Ashikhmin, R. Zhang, “An overview of massive MIMO: Benefits and challenges”, IEEE journal of selected topics in signal processing, vol. 8, no. 5, pp. 742-758, 2014.
[35] Simoens, O. Muñoz-Medina, J. Vidal, A. Del Coso, “On the Gaussian MIMO relay channel with full channel state information”, IEEE Transactions on Signal Processing, vol. 57, no. 9, pp. 3588-3599, 2009.
[36] Boyd, S.P. Boyd, L. Vandenberghe, “Convex optimization”, Cambridge university press, 2004.