遗传算法在认知无线电频谱感知中的应用  

Application of genetic algorithm on spectrum sensing of cognitive radio system

作　　者：邓丽粼[1,2] 张翠芳[1] 周兴建[2] 温坤华[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031 [2]中国西南电子技术研究所,四川成都610036

出　　处：《电子技术应用》2010年第3期113-116,共4页Application of Electronic Technique

摘　　要：针对基于OFDM系统的多带联合检测方法中门限向量选取问题,在一定的主用户干扰限制下,充分考虑各子信道特征,建立了门限向量优化模型。将遗传算法应用其中求解最优门限向量,使认知系统吞吐量得到了优化。仿真结果表明,这种方法比传统未使用优化而取一致门限的频谱感知方法对吞吐量的提高更有效。Based on the interference restriction for primary user, every channel characteristics are fully considered and a threshold vector optimization model is therefore set up. Then, the optimized threshold vector is obtained according to genetic algorithm. Consequently, the aggregate throughput of cognitive radio system has been greatly improved. The simulation results show that our approach for throughput optimization is more effective and advanced than the conventional technique with the same interference restriction.

关 键 词：认知无线电 频谱感知 遗传算法 

分 类 号：TN929.5[电子电信—通信与信息系统]