基于感知无线电非合作博弈功率控制算法的研究

Design of non-cooperative power control game algorithm for cognitive radio

本文基于Goodman提出的非合作博弈功率控制模型改进了代价函数。针对感知无线电系统(CR)中各用户的通信需求,采用多载波码分多址(MC-CDMA)感知无线电系统,解决感知用户对主用户干扰和通信中断等问题,为实现感知频谱资源的有效分配,提出了一种新的感知无线电系统功率控制博弈算法。通过仿真表明,该算法同几种经典算法相比,既满足不同种类用户SIR要求,又提高了系统吞吐量,实现了对不同用户发射功率的有效控制,且系统性能明显提高。

Based on the non-cooperative power control game （NPG） proposed by David Goodman, an improved pricing function is adopted. To meet the communications needs between licensed users and secondary users in cognitive radios, and ensured that the unimpaired operation of licensed users and secondary users’ communications be not intermitted, a MC-CDMA cognitive radio system and a hand-off technique were proposed for secondary users. In order to efficiently use the limited cognitive radio resources, a novel power control game algorithm in CR systems was adopted. The simulation results have shown that in comparison to several classical distributed algorithms, the novel algorithm can regulate their transmitter powers to meet the different SIR requirements and enhance the total throughput effectively. The performance of CR system is thereby improved obviously.