[1] BOCCARDI F,HEATH R W,LOZANO A,et al. Five disruptive technology directions for 5G[J]. IEEE Communications Magazine, 2014,52(2):74-80. [2] 肖可鑫, 夏斌, 陈智勇. 非正交多址接入的关键技术研究[J]. 中兴通讯技术,2017,23(3):6-10.(XIAO K X,XIA B,CHEN Z Y. Key Technologies for non-orthogonal multiple access[J]. ZTE Technology Journal,2017,23(3):6-10.) [3] XIAO Z,ZHU L,CHOI J,et al. Joint power allocation and beamforming for Non-Orthogonal Multiple Access(NOMA)in 5G millimeter wave communications[J]. IEEE Transactions on Wireless Communications,2018,17(5):2961-2974. [4] LIANG Y C,CHEN K C,LI G Y,et al. Cognitive radio networking and communications:an overview[J]. IEEE Transactions on Vehicular Technology,2011,60(7):3386-3407. [5] ARZYKULOV S,NAURYZBAYEV G,TSIFTSIS T A,et al. Outage performance of underlay CR-NOMA networks[C]//Proceedings of the 10th International Conference on Wireless Communications and Signal Processing. Piscataway:IEEE,2018:1-6. [6] LI C,GUO D,GUO K,et al. Outage performance of partial relay selection in underlay CR-NOMA networks[C]//Proceedings of the 28th Wireless and Optical Communications Conference. Piscataway:IEEE,2019:1-5. [7] ARZYKULOV S,TSIFTSIS T A,NAURYZBAYEV G,et al. Outage performance of cooperative underlay CR-NOMA with imperfect CSI[J]. IEEE Communications Letters,2019,23(1):176-179. [8] LIU X,WANG Y,LIU S,et al. Spectrum resource optimization for NOMA-based cognitive radio in 5G communications[J]. IEEE Access,2018,6:24904-24911. [9] XU W,QIU R,JIANG X. Resource allocation in heterogeneous cognitive radio network with non-orthogonal multiple access[J]. IEEE Access,2019,7:57488-57499. [10] XU Y,SHU F,HU R Q,et al. Robust resource allocation in NOMA based cognitive radio networks[C]//Proceedings of the 2019 IEEE/CIC International Conference on Communications in China. Piscataway:IEEE,2019:243-248. [11] JÁTIVA P P,CAÑIZARES M R,ARANCIBIA C S,et al. Nonorthogonal multiple access for cognitive mobile radio networks in 5G communications[C]//Proceedings of the 22nd Conference on Innovation in Clouds,Internet and Networks and Workshops. Piscataway:IEEE,2019:344-350. [12] LIANG X,DENG Q,YANG F. Throughput optimization based on simultaneously decoding and accessing in cognitive NOMA system[C]//Proceedings of the 2018 IEEE/CIC International Conference on Communications in China. Piscataway:IEEE,2018:694-698. [13] WANG X,NA Z,LAM K Y,et al. Energy efficiency optimization for NOMA-based cognitive radio with energy harvesting[J]. IEEE Access,2019,7:139172-139180. [14] MIRIDAKIS N I,ARZYKULOV S,TSIFTSIS T A,et al. Green CR-NOMA:a new interweave energy harvesting transmission scheme for secondary access[C]//Proceedings of the 16th International Symposium on Wireless Communication Systems. Piscataway:IEEE,2019:571-576. [15] 鲍慧, 佘蕊, 赵伟. 基于SWIPT的双向中继CR-NOMA系统研究[J]. 华中科技大学学报(自然科学版),2019,47(10):111-115,132.(BAO H,SHE R,ZHAO W. Research on two-way relay CR-NOMA system based on SWIPT[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2019,47(10):111-115,132.) [16] PANDEY D, PANDEY P. Approximate Q-learning:an introduction[C]//Proceedings of the 2nd International Conference on Machine Learning and Computing. Piscataway:IEEE,2010:317-320. [17] ZHANG S,LI L,YIN J,et al. A dynamic power allocation scheme in power-domain NOMA using Actor-critic reinforcement learning[C]//Proceedings of the 2018 IEEE/CIC International Conference on Communications in China. Piscataway:IEEE, 2018:719-723. [18] DAS A,GHOSH S C,DAS N,et al. Q-learning based cooperative spectrum mobility in cognitive radio networks[C]//Proceedings of the IEEE 42nd Conference on Local Computer Networks. Piscataway:IEEE,2017:502-505. |