基于门限值优化的双门限频谱检测算法

针对传统双门限能量检测,提出一种双门限门限值的优化方案。根据不同认知用户的信噪比,设定不同的双门限值,在进行协作频谱检测时,对双门限之间的检测结果使用最大比合并的方法进行再次判决,最终使用OR融合全部检测结果,得出最终判决结果。仿真结果表明,该方法能够有效提高频谱检测概率及频谱检测结果的可靠性。

In view of the traditional double threshold energy detection,proposed an optimization scheme of double threshold threshold value.According to the signal-to-noise ratio of different cognitive users,different double threshold values are set.When the cooperative spectrum detection is carried out,the detection results between the two gates are judged again with the maximum ratio combination method.Finally,the final result is obtained by using OR to fuse all the results of the detection.Simulation results show that the proposed method can effectively improve the probability of spectrum detection and the reliability of spectrum detection results.