一种脉冲压缩信号旁瓣抑制方法

A Method for Side-Lobe Suppression of Pulse Compression Signal

给出了一种在脉冲压缩技术中实现低的压缩脉冲距离旁瓣的方法 ,由希望的压缩脉冲波形来设计加权滤波器。导出了可实现低的压缩脉冲距离旁瓣的条件。实验用声表面波 (SAW )器件实现时 ,对线性调频信号 ,其压缩脉冲最大主旁瓣比为 5 0dB。而用数字方法实现时 ,压缩脉冲最大旁瓣电平还受A/D及D/A变换器位数的限制。

In this paper, a method used in pulse compression technology for side-lobe suppression of pulse compression is presented. In the method, the parameter of filter is obtained by the desired wave of compression pulse and the qualification for side-lobe suppression of pulse compression signal is educed. An experiment using SAW dispersive delay line is done for linear frequency model signal. It shows that the theoretical value (-50dB side-lobe levels) is in accordance with the experimental one. Another experiment using digital technique demonstrates that the side-lobe of pulse compression signal is restricted by the figure of A/D and D/A convertor.\;