基于Zak变换风廓线雷达间歇性杂波抑制

Intermittent Intensity Clutter Removal of Wind Profiling Radar Based on Zak Transform

间歇性强杂波严重干扰了风廓线雷达信号检测及风谱的识别,为了抑制该类杂波,文中提出了基于Zak线性时-频变换检测方法,该方法依据杂波的瞬变特性,能够有效地分离强间歇性杂波,且对信号分离后的时-频分布重构得到时域大气湍流回波信号,进而达到抑制杂波的目的,为后续数据处理提供高质量的数据资料。理论及计算机仿真表明该方法效果明显,具有良好的工程应用前景。

Intermittent intensity clutter may severely contaminate the signal detection and identification for wind spectral of wind profiling radar. In order to remove such clutter, a method based on Zak time-frequency transform is proposed. Not only the intermittent intensity clutter can be separated from the atmospheric signal in the time-frequency domain, also the atmospheric signal can be obtained in the time domain by reconstruction after separation. And the final goal is to remove the clutter. The high quality data is provided for the subsequent data. The theory and computer simulation also show that the method is valid, which has good prospects for engineering applications.