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由于协作通信技术能够抵抗信道衰落的影响,提供分集增益,成为目前研究热点之一。针对传统多中继译码转发协作通信中,所有潜在中继均参与协作从而导致系统的低资源利用率问题,提出了一种基于信道容量增益的中继节点选择策略。仿真结果表明,该策略只需选择一半的中继节点数就能获得和最优中继选择方法非常相近的系统性能,同时降低了系统的功率损耗和实现复杂度。
As cooperative communication technology can resist the impact of channel fading and provide diversity gain, it becomes one of the hot spots in the research. Aiming at the problem of low resource utilization in the system, all potential relays are involved in the cooperative communication in traditional multi-relay decoding and forwarding. A strategy of relay node selection based on channel capacity gain is proposed. The simulation results show that this strategy can obtain the system performance which is very close to the optimal relay selection method by selecting half the number of relay nodes, and at the same time, it reduces the power consumption and the complexity of the system.