低通滤波器对气象目标回波起伏特性改善分析  

Analysis of Fluctuation Characteristic Improvement of Meteorological Target Echo by Low-pass Filter

作　　者：朱亮 ZHU Liang(Nanjing Glarun Defense System Company Limited,Nanjing 210039,China)

机构地区：[1]南京国睿防务系统有限公司,江苏南京210039

出　　处：《电子质量》2024年第4期66-70,共5页Electronics Quality

摘　　要：气象雷达在探测气象信息领域被广泛地应用。主要讨论了气象雷达对降雨强度的精确测量问题,分析了雨回波信号幅度的起伏特性对其产生的实际影响,通过进一步运算得到降雨强度的平均回波功率。进而通过采用距离和方位低通滤波器来降低雨回波信号幅度的起伏特性,验证了滤波器输出信号方差越小,回波信号的涨落特性改善得越好的特点,取得了较好的效果。最后,通过调整低通滤波器系数对同一组数据给出了实测的仿真结果。Meteorological radar is widely used in the field of detecting meteorological information.The accurate measurement of rainfall intensity by meteorological radar is discussed,the practical influence of the undulation characteristics of rain echo signal amplitude is analyzed,and the average echo power of rainfall intensity is obtained through further operation.The undulation characteristics of rain echo signal amplitude are reduced by adopting distance and azimuth low-pass filters,which verifies that the smaller the variance of the output signal of the filter is,the better the rise and fall characteristics of the echo signal are improved,and the better results are achieved.Finally,the simulation results of the same set of data are given by adjusting the low-pass filter coefficients.

关 键 词：气象雷达 降雨强度 低通滤波器 

分 类 号：TN959.4[电子电信—信号与信息处理]