S波段天气雷达同频干扰实验与数据分析

S-band weather radar co-channel interference experiment and data analysis

借助福建省厦门市两部S波段天气雷达,使用频点和信号类型不同的干扰源开展同频干扰实验,分析连续波信号、脉冲同频同步和脉冲同频异步等3种类型干扰信号的差异;根据干扰源发射端增加窄带滤波器前后信号频谱宽度的变化,分析滤波器对干扰信号的抑制程度。研究结果表明,雷达对3种干扰源的同频干扰抑制能力均超过50 dB,窄带滤波器能够明显减小干扰源的频谱宽度。

The co-channel interference experiment uses interference sources having different frequency points and signal types with two S-band weather radars in Xiamen, Fujian Province, in order to analyze the differences between three types of interference signals: continuous wave signals, pulse synchronization and pulse synchronization. A narrow band filter is added at the transmitting of the interference source to compare the changes of signal spectral width, so as to analyze the suppression degree by the filter of the interference signal. The research results show that the ability of radar to suppress the co-channel interference exceeds 50 dB of the three types of interference sources, and the narrow band filter can reduce the spectral width of the interference sources significantly.