CAJ | 학술논문

相参雷达体制下采用时频域处理的CFAR检测器面临的一个共性问题就是由于时频域杂波模型与实际不匹配，以及数据样本有限导致的模型参数无法准确估计，进而导致实际检测器性能总是与理论设计有较大差距。为此，本文通过分析相参雷达时频域恒虚警（CFAR ）检测门限与虚警概率的函数关系，提出一种基于最小二乘拟合的检测门限获取方法，并给出了其工程实现途径。最后，采用实测数据对该方法进行检测性能仿真实验，实验结果表明，提出的检测门限获取方法有效可行，具有很好的工程应用前景。
상삼뢰체체제하채용시빈역처리적CFAR검측기면림적일개공성문제취시유우시빈역잡파모형여실제불필배，이급수거양본유한도치적모형삼수무법준학고계，진이도치실제검측기성능총시여이론설계유교대차거。위차，본문통과분석상삼뢰체시빈역항허경（CFAR ）검측문한여허경개솔적함수관계，제출일충기우최소이승의합적검측문한획취방법，병급출료기공정실현도경。최후，채용실측수거대해방법진행검측성능방진실험，실험결과표명，제출적검측문한획취방법유효가행，구유흔호적공정응용전경。
For the constant false alarm rate(CFAR)detector of coherent radar in time-frequency domain ,there is always a wide performance gap between the theoretical model and the practical result .Ultimately ,this problem is caused by the imperfect model of the clutter ,as well as the limited samples .A novel method of estimating the detection threshold is proposed in this paper . The method is based on the least square criteria and derived from the relationship between the CFAR detection threshold and the probability of false alarm .The implementation for the proposed method is given as well .Simulation results confirm the validity of the proposed method .