计算机工程 ›› 2008, Vol. 34 ›› Issue (4): 37-39.doi: 10.3969/j.issn.1000-3428.2008.04.013

• 博士论文 • 上一篇    下一篇

扫频干扰的自适应时变抑制研究

夏彩杰,王爱华,安建平   

  1. (北京理工大学信息科学技术学院,北京 100081)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-02-20 发布日期:2008-02-20

Research on Adaptive Time-varying Suppression of Frequency Sweeping Interference

XIA Cai-jie, WANG Ai-hua, AN Jian-ping   

  1. (School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-02-20 Published:2008-02-20

摘要: 在DSSS系统中,提出一种基于修正离散Chirp-Fourier变换(MDCFT)的扫频干扰自适应时变抑制算法。该算法采用MDCFT估计扫频干扰的参数,构造了实时性强的自适应时变干扰剔除器,推导了MDCFT检测扫频干扰的输出信噪比的闭合表达式。与Wigner-Hough变换(WHT)估计扫频干扰时的非线性损失相比,输出信噪比提高了3 dB,并给出了误码率的闭合表达式。数值仿真表明了理论分析的正确性和该方法的有效性。

关键词: 离散Chirp-Fourier变换, 自适应时变剔除器, 扫频干扰

Abstract: In DSSS communications system, this paper proposes an adaptive method for suppressing frequency sweeping interferences. The adaptive time-varying interference excision filter is constructed based on the interference parameter estimated by MDCFT. A closed form expression is found for the output of signal-to-noise ratio. Compared with the nonlinear loss of WHT, 3-dB is improved. The error probability in a closed form is expressed, and numerical simulation shows the exactness of the theoretical analysis and the validity of the method.

Key words: discrete Chirp-Fourier transform, adaptive time-varying excision, sweeping interference

中图分类号: