基于包络约束的幅相联合净空测量方法  

A Distance Measurement Method Based on Envelope Constraint with Amplitude and Phase Information

作　　者：邓佳欣[1] 马丁峰 徐云山 DENG Jia-xin;MA Ding-feng;XU Yun-shan(Chinese Flight Test Establishment,Xi'an Shaanxi 710089,China;95966 Troops of the PLA,Harbin Heilongjiang 150060,China)

机构地区：[1]中国飞行试验研究院,陕西西安710089 [2]中国人民解放军95966部队,黑龙江哈尔滨150060

出　　处：《计算机仿真》2023年第6期80-84,206,共6页Computer Simulation

摘　　要：针对多径和塔筒震动引起的杂波区叶片检测困难问题,基于叶片的先验边界约束,应用距离多普勒二维幅相联合掩膜检测方法,能够剔除非叶片的杂波信息,同时利用叶片的近似线性变化特性,结合最小二乘拟合和单元平均进一步提升目标的相位估计精度,保证叶片的净空估计连续性和准确性。所提方法能够显著改善叶片在强噪声和杂波环境下的干涉相位估计精度,提升系统对于叶片净空的测量稳定性。利用风场采集的地面雷达实测数据对所提方法进行了验证分析,上述算法能够有效剔除虚假点,检测叶片目标,并在各种工况下准确提取叶片目标的干涉相位,同时所提方法计算复杂度较低,对于低成本化设计具有很高的工程价值。Aiming at the difficulty of blade detection in clutter area caused by multipath and tower vibration,based on the prior boundary constraint of the blade,this method applies the range-doppler two-dimensional amplitude and phase joint mask detection method to eliminate the false alarm points of non-blade targets.At the same time,u-sing the approximate linear variation characteristics of the blade,combined with the least square fitting and unit aver-age,the phase estimation accuracy of the target is further improved to ensure the continuity and accuracy of the blade clearance estimation.The proposed method can significantly improve the accuracy of interference phase estimation of blades in strong noise and clutter environment,and the stability of blade clearance measurement.The method is veri-fied and analyzed by using the measured data of ground radar collected by the wind field.The algorithm can effective-ly eliminate false points,detect blade targets,and accurately extract the interference phase of blade targets under vari-ous working conditions.Meanwhile,the proposed method has high engineering value for its low-cost and low computa-tional complexity design.

关 键 词：民用雷达应用 多径和虚警点抑制 干涉相位估计 叶片净空监测 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]