CAJ | 학술논문

为了提高航海雷达目标检测性能，该文主要研究多分形布朗运动在扫描模式下雷达海杂波分形建模中的应用。该文验证实测海杂波数据具有非对称和尖峰厚尾的非高斯统计分布，并且具有分形特性；同时也证实实测数据在一定的情况下满足多分形布朗运动的假设条件。在此基础上，利用多分形布朗运动对实测数据进行建模，计算得到随时间变化的H?lder函数，结果显示不同距离区域的H?lder指数是不同的，目标处的H?lder指数大于海杂波处的H?lder指数。该文研究结果对后续目标检测方法的提出具有很大的帮助作用。
위료제고항해뢰체목표검측성능，해문주요연구다분형포랑운동재소묘모식하뢰체해잡파분형건모중적응용。해문험증실측해잡파수거구유비대칭화첨봉후미적비고사통계분포，병차구유분형특성；동시야증실실측수거재일정적정황하만족다분형포랑운동적가설조건。재차기출상，이용다분형포랑운동대실측수거진행건모，계산득도수시간변화적H?lder함수，결과현시불동거리구역적H?lder지수시불동적，목표처적H?lder지수대우해잡파처적H?lder지수。해문연구결과대후속목표검측방법적제출구유흔대적방조작용。
To improve the detection performance of marine radar, the application of multifractional Brownian motion to modeling the radar sea clutter in the scanning mode is studied. It is verified that real sea clutter data submit to a non-Gaussian distribution with asymmetry, high peak and heavy tail, and have fractal characteristics. In some cases the assumption of multifractional Brownian motion for the real data is satisfied. On the basis of this analysis, the real data are modeled by using the multifractional Brownian motion, and the time-dependent H?lder function of the real data is calculated. The results show that the H?lder exponents of different regions are not the same, and the H?lder exponent of target is significantly larger than that of the sea clutter. The research results are helpful to design a reliable detection method.