干扰系统先验信息未知的宽带能量检测

Energy Detection about Broadband Signal without Priori Information of Interference System

为了使感知无线电在宽带频谱中对干扰系统先验信息未知的信号进行能量检测时获得更好的检测性能,建立了一个基于采样的宽带频谱模型并且推导出了基于最小错判率准则的判决门限闭式解.仿真结果表明,在宽带信号能量检测中采用最小错判率准则比使用传统窄带信号能量检测判决准则能在干扰系统先验信息未知的情况下获得更好的信号检测性能.

In order to improve the performance of energy detection on broadband signals without priori information of interference system,a broadband spectrum model based on sampling is set up,and the closed-form of the decision threshold based on the minimum-error-rate criteria is derived.Simulation shows that the minimum error rate detection outperforms traditional narrowband signal detection in broadband scenario in absence of priori information.