基于广义S变换进行雷达信号时频滤波去噪

S变换自问世以来,凭借其优越性已经被广泛地应用于数字信号处理中。针对深空目标雷达回波信号的复杂性,为了得到较好的雷达回波信号,将基于广义S变换的时频滤波应用于雷达回波信号去噪中,并利用低通滤波器设计了时频滤波算子,克服了传统滤波去噪方法滤波因子不能随时间、频率变化而变化的缺陷。通过理论分析与仿真波形对比表明,滤波后能有效地去除噪声,很好地保留了原始雷达回波信号的信号特征,展示了基于广义S变换的时频滤波的可行性,为雷达回波信号去噪提供提供了一种很好的方法。

Time-frequency Filtering of Radar Signal Based on Generalized S Transform

The S Transform has been widely used in digital signal processing since it came out. The radar echo signal of targets in space is very complex, so this paper presents the time- frequency filtering of radar signal based on generalized S transform and designs the time- frequency filter to conquer the defect caused by traditional filter which doesn＇t change with time and frequency. It shows that the filter can remove noise effectively and reserv~ signal character of the primitive radar echo signal by theory analysis and simulation results. So, it is feasible of the time- frequency filter based on general- ized S transform in this field, and it is a good method in radar echo signal process.