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利用Jensen不等式分析非对称信道下协作通信的中断概率,得到中断概率上下边界,用MATLAB仿真验证该边界的准确性。以确定的系统目标中断概率为前提,提出基于最小化协作域发射总功率的中继选择方案,并分析该方案的性能。仿真证明,在相同信道条件下该方案相对于其他中继选择方案能显著地节省功率。
The Jensen inequality is used to analyze the interruption probability of cooperative communication under asymmetric channel, the upper and lower bounds of the interrupt probability are obtained, and the accuracy of the boundary is verified by MATLAB simulation. Based on the determined system target interrupt probability, a scheme based on minimizing the total power of the cooperative domain is proposed and the performance of the scheme is analyzed. The simulation proves that the scheme can save power significantly compared with other relay selection schemes under the same channel conditions.