ID 原文 译文
6654 实测回波的弱目标检测往往面临复杂杂波环境,如信杂比过低、难以获取信杂比与杂波分布等先验信息,此时基于杂波建模的弱目标检测前跟踪(track-before-detect,TBD)方法会遇到困难。 Measured echo of the weak target detection often faces a complex clutter environment, such as noise ratio is too low, it is difficult to obtain letter of mixed ratio and clutter distribution priori information, such as the weak target detection based on clutter modeling before track (track - before - detect, TBD) method will encounter difficulties.
6655 针对上述问题,本文提出一种新的用于未知强杂波实测数据的弱目标检测算法。 According to the above problem, this paper proposes a new for unknown strong clutter the measured data of the weak target detection algorithm.
6656 依据未知分布、边缘环境等特点通过改进的最大值恒虚警进行杂波预处理,通过压缩多普勒-距离二维数据避免多帧积累使杂波在同一分辨单元产生强度叠加,最后在时间-距离空间改进基于动态规划的TBD算法解决多帧联合后杂波在不同距离单元的范围扩展,消除虚警。 On the basis of the unknown distribution, characteristics of edge environment by improving the maximum constant false alarm for clutter pretreatment, by compressing the doppler - from the 2 d data to avoid frame accumulation make the clutter in the same resolution cell produces intensity superposition, the last in time - space distance to improve the TBD algorithm based on dynamic programming to solve multiple frame joint after clutter in the scope of the different distance unit extension, eliminate the false alarm.
6657 实验结果表明,本文算法相比常规方法具有更高的检测概率及更低的估计误差。 The experimental results show that the algorithm is compared with the conventional method has higher detection probability and lower estimation error.
6658 针对传统圆极化微带天线轴比带宽较窄的问题,提出了一种新型的超宽带圆极化印刷天线。 For traditional circular polarization microstrip antenna axis problem than a narrow bandwidth, this paper proposes a new type of ultra wideband circularly polarized printed antenna.
6659 该天线结构简单,仅由C型辐射贴片和改进后的地板组成。 The antenna structure is simple, only by the radiation patch and the improved C of the floor.
6660 采用微带馈电模式,整个天线尺寸仅为25mm×25mm×1mm。 Adopt the microstrip feed mode, the antenna size is only 25 mm * 25 mm * 1 mm.
6661 通过优化C型贴片和在地板上增加三角形和小长方形微扰结构,可以有效增加天线的阻抗带宽和轴比带宽。 By optimizing C patch on the floor and increase the small triangle and rectangle perturbation structure, can effectively increase the impedance of the antenna bandwidth and the axial ratio bandwidth.
6662 给出了天线的设计流程,从表面电流分布分析了圆极化天线的工作机理。 Antenna design process is given, and the circular polarization antenna are analyzed from the points of surface current distribution of working mechanism.
6663 加工了天线实物,并对其进行了测量。 Processing the antenna, and the measurement.