现代电子技术2018，Vol.41Issue(9)：6-10,16,6.DOI:10.16652/j.issn.1004-373x.2018.09.002
高斯白噪声信道下的弱信号盲检测方法
Weak signal blind detection method for Gaussian white noise channel
摘要
Abstract
In the field of electronic reconnaissance,the detection effect of the traditional time?domain detection method is not ideal due to the loss of signal prior information,so the transform?domain detection method is widely used,in which the fre?quency?domain detection method is the most widely?used and most cost?effective method. The DFT operation can improve the sig?nal?to?noise ratio from time domain to frequency domain in the signal conversion. For the weak signal,the DFT operation for enormous points can meet the requirement of the detector. In order to reduce the dependence of dual?channel frequency?domain CFAR detection method on hardware conditions,a virtual clutter reference channel establishment method based on noise itera?tive evaluation is proposed. On the basis of the available research results of frequency?domain CA?CFAR detection method,the non?coherent accumulation method is introduced. After a certain times of frequency?domain energy accumulation,the frequency?domain peak?to?average ratio of the noise is reduced while maintaining the frequency?domain peak?to?average ratio of the signal, and the perfect detection performance is obtained. The two algorithms are performed with a certain times of non?coherent accumu?lation and the threshold is performed with a certain empirical correction to get the detection threshold whose false alarm rate and fail alarm rate are less than 0.1%.关键词
电子侦察/信号盲检测/频域检测/非相干积累/信噪比/频域峰均比Key words
electronic reconnaissance/signal blind detection/frequency⁃domain detection/non⁃coherent integration/signal⁃to⁃noise ratio/frequency⁃domain peak⁃to⁃average ratio分类
信息技术与安全科学引用本文复制引用
冯帅,高扬,王勇..高斯白噪声信道下的弱信号盲检测方法[J].现代电子技术,2018,41(9):6-10,16,6.基金项目
国家自然科学基金资助项目(61622107) （61622107）
国家自然科学基金资助项目(61471149)Project Supported by National Natural Science Foundation of China(61622107,61471149) （61471149）
