本成果来源于已结题的国家自然科学基金项目“协作分集系统中机会角色选择策略研究”（编号：61301135），负责人：丁海洋。

协作分集系统研究以往大多假定系统中各节点所担当的协作角色是固定不变的。

这种固定的角色指配方式可以极大简化协作分集系统设计，但却不能实时选出传输质量最好的链路来承载信息，降低了传输可靠性。

从研究具有高传输可靠性的中心化角色选择方法入手，本成果设计了高传输可靠性和低信令开销的分布式协作角色选择方法，研究成果包括三篇学术论文： [1] Haiyang Ding, D. B. da Costa, W.-L. Liu, and Jianhua Ge, "Enhancing cooperative diversity gains in dual-hop one-way/two-way AF relaying systems: A fully opportunistic role selection strategy," IEEE Trans. Veh. Technol., vol. 64, no. 8, pp. 3440-3457, Aug. 2015. [2] Haiyang Ding, D. B. da Costa, M.-S. Alouini, Jianhua Ge, and F.-K. Gong, "Distributed role selection with ANC and TDBC protocols in two-way relaying systems," IEEE Trans. Commun., vol. 63, no. 12, pp. 4727-4742, Dec. 2015. [3] Haiyang Ding, D. B. da Costa, H. A. Suraweera, and Jianhua Ge, "Role selection cooperative systems with energy harvesting relays," IEEE Trans. Wireless Commun., vol. 15, no. 6, pp. 4218-4233, Jun. 2016.