Selective merging-based energy harvesting cooperative multi-user cognitive NOMA transmission method

The invention belongs to the technical field of communication, and particularly relates to an energy harvesting cooperative multi-user cognitive NOMA transmission method based on selective merging. For an energy collection assisted CR-NOMA network with a plurality of secondary user source nodes, a primary user transmitter sends a signal to a primary user receiver, an optimal secondary user source node with the maximum signal-to-noise ratio between the primary user transmitter and the secondary user source nodes is selected as a relay forwarding signal, and NOMA cooperative transmission is adopted. Transmission is divided into two stages, the main user receiver combines the signals received from the two transmission stages through selective combination, and the system performance is improved. 本发明属于通信技术领域，具体涉及一种基于选择合并的能量收集协作多用户认知NOMA传输方法。对于能量收集辅助的具有多个次用户源节点的CR-NOMA网络，主用户发射机将信号发送给主用户接收机，选择主用户发射机与次用户源节点间信噪比最大的最佳次用户源节点作为中继转发信号，采用NOMA协同传输。传输分为两个阶段，主用户接收机通过选择合并将从两个传输阶段接收到的信号合并，提高了系统性能。