认知无线多跳网中保证信干噪比的频谱分配算法

Spectrum allocation with SINR guarantee for cognitive wireless multi-hop networks

为解决无线多跳网络在固定频谱分配方式下所固有的信道冲突等问题,利用认知无线电的动态频谱分配技术,提出了一种适用于次用户组成的无线多跳网络的、underlay方式下的全分布式频谱分配算法。该算法将频谱分配问题建模成静态非合作博弈,证明了纳什均衡点的存在,并给出了一种求解纳什均衡点的迭代算法。大量仿真实验证明,该算法能实现信道与功率的联合分配,在满足主用户干扰功率限制的同时,保证次用户接收信干噪比要求。

To solve the problems inherent in fixed spectrum allocation wireless multi-hop networks such as channel colli-sion,a full distributed spectrum allocation algorithm in ‘underlay’ fashion was proposed by using dynamic spectrum al-location technology in cognition radio,which was designed for wireless multi-hop networks formed with secondary users（SUs）.This algorithm modeled the spectrum allocation problem as a static non-cooperative game,proofed the existence of Nash equilibrium（NE）,and proposed an iterative algorithm to solve the NE.Extensive numerical experiments demon-strated that this algorithm can achieve the joint allocation of channels and power,and guarantee SUs’ signal to interfer-ence plus noise ratio（SINR） request while satisfying primary users’ interference power limit.