认知无线电网络中基于和声搜索的频谱分配与功率控制

针对认知无线电网络中功率控制和频谱分配过程存在互相影响的问题,提出一种基于和声搜索的频谱分配和功率控制算法。通过综合分析频谱分配和功率控制过程中的各种约束条件,建立了联合功率控制和频谱分配的系统模型。算法根据系统模型特点设计和声搜索算法下相应编码方案,采用多目标优化方法处理复杂的约束条件,并赋予可行解适当的优先权重。仿真实验表明,算法可以很好地解决认知无线电网络中的频谱分配和功率控制问题。

Spectrum Allocation and Power Control Based on Harmony Search Algorithm in Cognitive Radio Network

Aiming at the problem of the power control and spectrum allocation processes generating interference with each other in cognitive radio network,we proposed a power control and spectrum allocation algorithm based on harmony search in cognition radio network.With the comprehensive analysis of the conditions of various constraints and influence in the processes of spectrum allocation and power control,system model which joints power control and spectrum allocation is established.Coding scheme of harmony search algorithm was designed based on the characteristics of system model,and the algorithm chose the method of multi-objective optimizations to deal with model in complex constraints by giving feasible solutions appropriate priority weights.Simulation experiments show that the algorithm can solve the spectrum allocation and power control problems very well in cognitive radio network.