Joint User and Relay Selection for Cooperative NOMA Networks

This work was supported in part by the Science and Technology Program of Guangzhou, China, under Grant 201707010389, in part by the Scientific Research Project of Guangzhou Municipal University under Grant 1201620439, in part by the Qingshanhu Young Scholar Program in GZPYP under Grant 2016Q001, in part by Comba Research Funds under Grant JX-PYP-201501 and Grant H2017007, in part by the Sichuan International Science and Technology Cooperation Project under Grant 2017HH0035, in part by the National Natural Science Foundation of China under Grant 61501382, in part by the Fundamental Research Funds for the Central Universities under Grant 2682015RC20 and Grant 2682016CY22, in part by the Science and Technology Planning Key Project of Guangdong under Grant 2016B010124014, in part by the National Natural Science Foundation of China under Grant 61471229 and Grant 61772007, in part by the Innovation Improvement Project for Universities under Grant 2015KTSCX040, in part by the Natural Science Foundation of Guangdong under Grant 2014A030306027, and in part by Guangzhou University's 2017 training program for young top-notch personnels under Grant BJ201702.