利用平均距离谱法抑制线性调频雷达射频干扰

Suppressing of Radio-Frequency Interferences in Chirp Radar Based on Averaging Range Spectrum

基于单一载频的射频干扰(RFI)在线性调频雷达中的表现形式,利用平均距离谱法获得了RFI的多普勒分布谱图.提出了利用时频分析精确地确定干扰分布位置的方法,利用去相关及时频滤波滤除了RFI的影响.经过模拟及实测数据的检验,表明基于该模型的上述方法可有效解决线性调频雷达的RFI抑制问题.

Radio-frequency Interferences(RFI) take the form of chirps after mixing with the intermediate frequency signal in a chirp radar and these chirps aggravate the performance of the radar. A method for surpressing RFI in a chirp radar based on averaging range spectrum is developed, by averaging range spectra, the RFI can be detected and suppressed in time-frequency domain. Computer simulation and experiment show that the method is valid and it can effectively suppress radio-frequency interferences in a chirp radar.