计算机工程与应用 ›› 2008, Vol. 44 ›› Issue (25): 69-71.DOI: 10.3778/j.issn.1002-8331.2008.25.021

• 研发、设计、测试 • 上一篇    下一篇

一种新的线性调频信号数字产生方法

黄洪全1,方 方1,万永伦2,苏仔建1   

  1. 1.成都理工大学 核技术与自动化工程学院,成都 610059
    2.中国电子科技集团公司 第十研究所,成都 610036
  • 收稿日期:2008-04-11 修回日期:2008-07-08 出版日期:2008-09-01 发布日期:2008-09-01
  • 通讯作者: 黄洪全

New digital method for linear frequency modulated signal generated

HUANG Hong-quan1,FANG Fang1,WAN Yong-lun2,SU Zai-jian1   

  1. 1.School of Nuclear Technology and Automation,Chengdu Univercity of Technology, Chengdu 610059,China
    2.No.10th Research Institute,China Electronics Technology Group Corporation,Chengdu 610036,China
  • Received:2008-04-11 Revised:2008-07-08 Online:2008-09-01 Published:2008-09-01
  • Contact: HUANG Hong-quan

摘要: 线性调频信号是雷达中常采用的一种脉冲压缩信号。提出了一种新的线性调频信号数字产生方法,该方法是利用两个二阶无限脉冲响应滤波器进行计算产生信号;分析和评价了用该方法产生带宽为15 MHz、脉宽为20 µs的线性调频信号,并进行了幅度误差补偿。实验结果及分析表明:该产生方法具有计算复杂度低、无需大容量存储器且实现容易的特点。

关键词: 线性调频信号, 脉冲压缩, 无限脉冲响应滤波器, 匹配滤波器, 直接数字合成技术

Abstract: The Linear Frequency Modulated(LFM) signal is a popular pulse compression radar signal.A new digital method for LFM signal generated is proposed.The LFM signal can be generated by means of two second-order infinite impulse response filters(IIR) computing.At the same time the LFM signal generated in this way with 15 MHz bandwidth and 20 µs pulse width is analyzed and evaluated.The amplitude error of the signal is compensated.The experiment results and analysis show that the merits of the method are low computational capability,very low memory and easy realization.

Key words: Linear Frequency Modulated signal, pulse compression, Infinite Impluse Response filter, matched filter, Direct Digital Synthesizer(DDS)