基于网络综合法脉冲压缩信号的旁瓣抑制

Sidelobe Suppression of Pulse Compression Signal Based on Network Synthesis

脉冲压缩信号在雷达系统中有着广泛应用,而一直以来旁瓣抑制问题也备受关注。通常,时宽带宽积(BT)较大的线性调频信号可通过单一加窗实现较低旁瓣,但对于其它脉冲压缩信号效果甚微,文中提出的基于网络综合的旁瓣抑制的频域设计方法则适用于各种脉冲压缩信号。线性调频和二相编码混合信号兼备线性调频和相位编码信号的特点,因此文中以此信号为例进行了仿真,分析表明采用网络综合法进行旁瓣抑制,旁瓣效果理想且对多普勒频移不敏感。

Pulse compression signal is widely used in radar system, and the issue of sidelobe suppresion is a subject that is always paid great attention to. In general, linear frequency modulation that has a big BT product can attain lower sidelobes by using a window function. However, it does not work well for other types of pulse compression signal. A frequency-domain design method for sidelobe suppression based on network synthesis method is presented in this paper. It can be applied almost to all kinds of pulse compression signal. Frequency and phase combined modulated signals have advantages of linear frequency modulation and phase coded waveform. Therefore, a simulation analysis of this signal is given, which indicates that the results are ideal and not sensitive to Doppler frequency shift with the method of network synthesis. [