摘要
文章以线性调频Chirp信号为例,给出了一种基于MATLAB软件的脉冲压缩技术的仿真研究方法。该方法能够得到窗函数类型、脉冲压缩参数如时宽T和带宽B对脉冲压缩的影响效果,研究中利用MATLAB软件搭建匹配滤波器系统模型,分别在改变窗函数类型、发射信号的时宽T、带宽B的条件下对Chirp信号进行脉冲压缩处理的仿真,得出3组脉压后信号的主瓣峰值、主瓣宽度以及旁瓣峰值的特征效果图。结果表明,脉冲压缩后主瓣高度随时宽T的增大而增高;一定范围内带宽B越大主瓣越窄;加窗函数削弱了旁瓣能量,但同时降低了主瓣峰值,加宽了主瓣宽度。脉冲压缩技术为提高医疗领域的图像分辨率和探测深度提供了巨大的助力,同时脉冲压缩技术的日益成熟将为其他领域带来全新的技术革新。
A Matlab-based simulation method for pulse compression technology was proposed by taking the linear FM chirp signal as an example. The impact of window function, time-width T and bandwidth B on pulse compression could be obtained. A Matlab-based matched filter model was built with which the chirp signal was compressed and simulated with different window functions, time-width T and bandwidth B of transmitted signal respectively. Finally, the diagrams of main lobe height, main lobe width and peak-side lobe of three sets of the signals after pulse compression were obtained. The simulation results indicate that the main lobe height after pulse compression increases with the increase of the time-width T, the main lobe width decreases with the increase of bandwidth B, the window functions suppress side lobes while decreasing main lobe height and increasing main lobe width. Pulse compression technology can improve image resolution and depth of detection. The further research on this technology will bring new technological innovations to other fields.
作者
周春明
杨丹
ZHOU Chun-ming;YANG Dan(School of Mechanical and Electronic Engineering,Eastern Liaoning University, Dandong 118003,China;Bettersize Instruments Ltd, Dandong 118000, China)
出处
《辽东学院学报（自然科学版）》
CAS
2019年第3期199-203,共5页
Journal of Eastern Liaoning University:Natural Science Edition
基金
辽东学院青年基金项目(2017QN013)
