CAJ | 학술논문

为提高高分辨雷达的检测性能,提出了一种高斯杂波背景下距离扩展目标的模糊检测方法.该方法采用模糊恒虚警率(constant false alarm rate, CFAR)检测器代替传统的二进制CFAR检测器,将距离单元值转换成映射到虚警空间的模糊隶属函数值,然后采用模糊积累准则进行积累,得到检测统计量.研究了模糊代数积、模糊代数和两种积累准则,推导出这两种方法虚警概率的数学解析式.仿真结果表明,高斯杂波背景下模糊代数积积累较双门限二进制积累可获得近2 dB的性能改善.同时,模糊检测方法只采用单个检测门限,具有易于调节的优点.
위제고고분변뢰체적검측성능,제출료일충고사잡파배경하거리확전목표적모호검측방법.해방법채용모호항허경솔(constant false alarm rate, CFAR)검측기대체전통적이진제CFAR검측기,장거리단원치전환성영사도허경공간적모호대속함수치,연후채용모호적루준칙진행적루,득도검측통계량.연구료모호대수적、모호대수화량충적루준칙,추도출저량충방법허경개솔적수학해석식.방진결과표명,고사잡파배경하모호대수적적루교쌍문한이진제적루가획득근2 dB적성능개선.동시,모호검측방법지채용단개검측문한,구유역우조절적우점.
In order to improve the detection performance of the high resolution radar (HRR), a new detection scheme of range-extended targets based on fuzzy logic is proposed. It computes the values of the membership function to the false alarm space from the samples of the reference cells by replacing the conventional binary constant false alarm rate (CFAR) detector with a fuzzy CFAR detector. Then these values are combined according to fuzzy integrators to produce a global detection statistic. The fuzzy algebraic sum integrator and the fuzzy algebraic product integrator are considered, and the analytic expressions of the false alarm rate for them are derived. Simulation results show that the fuzzy algebraic product integrator renders nearly 2 dB improvement of SNR over the binary integrator in Gaussian clutter. In addition, these fuzzy integrators have the characteristic that the false alarm rate can be tuned using a single threshold, more easily than that of the dual-threshold binary integrator.