›› 2010, Vol. 23 ›› Issue (3): 65-.

• 论文 • 上一篇    下一篇

欠采样与ZFFT在移频信号检测中的应用

袁薇1,孙景峰2,樊文侠2   

  1. (1西安邮电学院 电子信息工程系,陕西 西安710061;2西安工业大学 电子信息工程学院,陕西 西安710032)
  • 出版日期:2010-03-15 发布日期:2010-05-12
  • 通讯作者: 袁薇(1976-),女,硕士,讲师。研究方向:信息处理研究。
  • 作者简介:袁薇(1976-),女,硕士,讲师。研究方向:信息处理研究。

Application of Underrate Sampling and ZOOMFFT in Frequency Shift Detection

Yuan Wei1,Sun Jingfeng2,Fan Wenxia2   

  1. (1Department of Electronic Information Engineering,Xian University of Post and Telecommunications,Xian 710061,China; 2College of Electric Information Engineering,Xian Technological University,Xian 710032,China)
  • Online:2010-03-15 Published:2010-05-12

摘要:

轨道移频信号检测需要具有相对较高的频率分辨率。在检测仪器内存和FFT计算长度有限制的情况下,为进一步获得较高的频率分辨率,则需对有用频段进行选频细化分析。文中将欠采样技术与ZOOM-FFT频谱细化技术相结合,用Matlab软件,对国产18信息轨道移频信号检测算法进行仿真验证,结果表明所提出的检测算法是可行的,并为轨道电路移频信号检测仪表的设计提供了方法依据。

关键词: 移频信号, 欠采样, ZOOM-FFT, 频率分辨率, Matlab仿真

Abstract:

Frequencyshift keying signal detection needs a relatively high frequency resolution.With the limit to the detection equipment memory and FFT calculated length in the detection algorithm,the useful frequency band needs to be selected and partially analyzed if we want to obtain a higher frequency resolution.This paper combines the underrate sampling technology and the spectrum refining technology,and simulates and verifies the detection algorithm of the homemade 18 information track circuit frequency shift signal based on the software Matlab.The simulation shows that the detection algorithm is totally feasible.This offers a method of direction for designing the track circuit frequency shift signal detection instruments.

Key words: frequencyshift signal;underrate sampling;ZOOMFFT;frequency resolution;Matlab simulation

中图分类号: 

  • TN91172