非对称双向D2D通信系统的中继选择优化算法

提出了一种面向D2D通信系统中非对称双向中继信道的中继选择优化算法;该算法依据定义的非对称性双向D2D链路信道总容量最大化为优化目标,推导了新的目标函数以及确定最优功率分配,并在此基础上通过非线性优化选出最佳中继。仿真结果表明,非对称双向中继通信系统的最优功率分配结果与理想对称双向中继系统的结果一致,而提出的中继选择方案比按理想对称双向中继优化方案得到的链路信道总容量更大,但是相应的计算复杂度会更高。

Optimal Relay Selection for Asymmetric Two-Way D2D Relay Communication Channel

In this paper, we proposed a relay selection optimization algorithm for asymmetric two-way relay channel in D2D communication systems. The algorithm determined the optimization goal based on the defined maximized total capacity of asymmetric two-way D2D link channels, derived a new objective function and determined the optimal power allocation. On this basis, the optimal relay is selected through nonlinear optimization. The simulation results show that the optimal power allocation of asymmetric two-way relay communication system is consistent with that of the ideal symmetric two-way relay system. However, the total capacity of the proposed scheme is larger than that of ideal symmetric two-way relay scheme , but with higher computational complexity.