认知无线电的功率估算策略

Power Estimation of Cognitive Radio

认知无线电用户在通信前需要通过周围电磁场的参数估算自身的最大通信功率以免影响原授权用户的正常通信,文章提出了一种基于节点协作来进行发射功率估算的策略,不但可以无需知道授权用户的发射功率,而且可以有效的预测出处于深度对数正态阴影衰落中的节点并进行有效补偿。通过对各种经典应用场景的仿真证明,与目前流行的单点估算算法相比,文中算法能获得更优的通信功率。

Cognitive Radio Users needed to estimate transmission power by measuring local electromagnetic field strength to avoid interfering with the transmission between the Primary Users before transmission.This paper presented a cooperative power estimation scheme,which could not only be unaware of the transmission power of the Primary User,but also locate the nodes with deep log-normal shadowing and equalize the shadowing.Simulation results of classical application show that the cooperative power estimation scheme gives much better performance than the single node estimation scheme.