基于三阶段双向中继系统的功率分配问题研究

Exploration on Power Allocation based on Three-phase Two-way Relay System

基于三阶段双向不可信中继系统的物理层安全问题,考虑将协作干扰策略运用在双向安全系统,并结合贪婪功率分配算法对系统性能进行分析。系统中每个源节点的发射功率分为两个部分,分别对应于用户和干扰信号。分析每个源节点处的最小干扰信号功率,并作为对比给出等功率分配(Equal PA)方案和选择性单向传输(SUDT)方案的性能分析。实验仿真得出,所提出的功率分配算法的性能明显优于其他方案。

Based on the physical layer security of the three-phase two-way untrusted relay system, the cooperative interference strategy is considered to be used in the bidirectional security system, and in combination with the greedy power allocation algorithm, the system performance is discussed. The transmission power of each source node in the system is divided into two parts, corresponding respectively to the user and the interference signal. The minimum interference signal power at each source node is analyzed, and the performance analysis of the Equal PA scheme and the SUDT （Selective Unidirectional Transmission） scheme is given for comparison. Experimental simulations indicate that the performance of the proposed power allocation algorithm is obviously better than that of the other schemes.