摘要
能量检测法是一种适用范围广泛的信号盲检测方法,而统计特性分析的准确估计是其应用的基础和前提。针对其检测量的统计特性分析,通过系统分析和理论推导,发现在仅有噪声输入的情况下,检测量服从卡平方分布;信号加噪声输入时的检测量服从非中心卡平方分布。最后利用详细的仿真分析验证了检测量统计特性分析的正确性,为能量检测法的应用提供了参考和依据。
The energy detection method is widely used in the blind signal detection field, and the precise es- timation of the statistical characteristics analysis is the basis and precondition in its application. For the analysis of the detection quantity＇s statistical characteristics, following results are given by systematic analysis and theoretic deduction. The detection quantity obeys chi-square distribution when no signal but only noise is added to the input, while it obeys non-central chi-square distribution when both signal and noise are added to the input. Finally, the simulation proves the correctness of the analysis of the detection quantity＇s statistical characteristics, and provides the reference and foundation for the application of energy detection.
出处
《航天电子对抗》
2014年第6期41-44,64,共5页
Aerospace Electronic Warfare
基金
国家自然科学基金(61271300
61072107)
关键词
能量检测
统计特性分析
卡方分布
非中心卡方分布
energy detection
statistical characteristic analysis
chi-square distribution
non-central chi-square distribution
