改进蛙跳算法的多中继协作系统最优功率分配

协作通信与直接通信相比能够显著地提高系统性能,功率分配是协作通信中的一个关键问题。为了获得合理的协作中继通信系统功率分配方案,提出一种基于改进蛙跳算法的多中继节点功率分配方法。首先对功率分配问题进行分析,将其转换为一个非线性优化问题,然后将青蛙表示为源节点,中继节点的功率,以平均信噪比作为青蛙的食物,并通过青蛙的信息交流和协作找到最优的功率分配方案,最后采用仿真对比实验对本文算法性能进行测试。仿真结果表明,相对于其它功率分配方法,改进蛙跳算法有效地提高了系统的信道容量,降低了中断概率,以较低的复杂度提高了系统的性能。

Power allocation in multi-relay cooperative system based on improved frog leaping algorithm

The cooperative communication can get better performance of systems than the direct transmission, how to allocate power is one of the most important issues in wireless cooperative diversity systems. In order to get good power al_location scheme for cooperative relay communication system, the paper puts forward a power allocation in multi-relay co_operative system based on improved frog leaping algorithm. Firstly, the power allocation problem is analysis to build a nonlinear optimization problem, and then the frog represents power source node, and relay nodes with an average SNR are taken as frog food, the optimal power allocation scheme through is found by the exchange of information and coopera_tion of the frog, finally the simulation experiment is carried out to test the performance. The results show that the modi_fied frog leaping algorithm can effectively increase the channel capacity and reduce the outage probability compared with other power allocation methods, so it uses lower complexity and improves the performance of the system.