对调频步进信号两种脉压方法的比较研究  

The Study on Comparison of Two Methods for Compressing Stepped-Frequency Train of LFM Pulses

作　　者：杨丽丽[1] 胡学成[1] 

机构地区：[1]南京电子技术研究所,南京210013

出　　处：《中国电子科学研究院学报》2007年第5期503-506,512,共5页Journal of China Academy of Electronics and Information Technology

摘　　要：研究了调频步进信号两种合成处理方法。一种是先进行子脉冲压缩处理,然后在脉冲间进行傅立叶逆变换,这种方法会产生距离栅瓣。借助于调频步进信号的模糊函数分析距离栅瓣产生原因,并给出信号参数约束条件,以消除距离栅瓣;另一种方法是先把子脉冲串合成完整的线性调频信号,再进行压缩处理,这种方法可以避免栅瓣的产生,但是处理方法比较复杂。通过计算机仿真结果,证明了两种算法的正确性,并详细分析两种处理方法的特点。Stepped frequency train of LFM （ Linear Frequency Modulation） pulses＇ two methods of synthesis processing is studied in this paper. One method is to compress each sub pulse and does IDFT （Inverse Discrete Fourier Transform） between pulses. However, it produces range grating lobes. Based on the ambiguous function of stepped frequency train of LFM pulses, this paper analyzes the reason why it produces range grating lobes and gives the signal parameters＇ restriction to remove the grating lobes. The other method is to synthesize the sub pulse, make it an integrated LFM, and compress it. This method can avoid producing grating lobes, but it is complicated. By computer simulation, two algorithms are proved to be correct, and the characteristics of the two methods are analyzed in detail.

关 键 词：调频步进信号 模糊函数 一步脉压处理 两步脉压处理 

分 类 号：TN951[电子电信—信号与信息处理]