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自适应能量检测器(AED)是一种信号导向矢量完全未知时有效的检测器,最早根据广义似然比(GLRT)准则得到。该文首先分析了AED一些重要特性。指出AED与根据Rao准则和Wald准则得到的检测器相同,并得到了其精确的统计分布,根据该统计分布进而较容易地推导出AED解析的检测概率(PD)和虚警概率(PFA)。其次利用AED设计了一种信号失配情形下的参数可调检测器。与现有的参数可调检测器相比,新检测器对失配信号的检测具有更好的灵活度。此外,对于匹配信号,新检测器具有更高的检测概率。该可调检测器的这些功能通过调节两个标量参数实现,两个参数被称为可调参数。
The Adaptive Energy Detector (AED) is a detector that is completely unknown when the signal steering vector is completely unknown. It was first obtained based on the Generalized Likelihood Ratio (GLRT) criterion. The paper first analyzes some important characteristics of AED. It is pointed out that the AED is the same as the detector obtained according to the Rao criterion and the Wald criterion, and its accurate statistical distribution is obtained, from which it is easier to derive the AED analytical detection probability (PD) and the false alarm probability (PFA). Secondly, a parameter adjustable detector with signal mismatch was designed by AED. Compared with the existing adjustable parameter detector, the new detector has better flexibility for detecting the mismatch signal. In addition, the new detector has a higher detection probability for matched signals. These functions of the adjustable detector are achieved by adjusting two scalar parameters, the two parameters being called adjustable parameters.