J4 ›› 2010, Vol. 37 ›› Issue (4): 743-750.doi: 10.3969/j.issn.1001-2400.2010.04.029

• 研究论文 • 上一篇    下一篇

基于循环平稳的级联空时GPS抗干扰方法

石斌斌;程翥;钱林杰;皇甫堪   

  1. (国防科技大学 电子科学与工程学院,湖南 长沙  410073)
  • 收稿日期:2009-05-24 出版日期:2010-08-20 发布日期:2010-10-11
  • 通讯作者: 石斌斌
  • 作者简介:石斌斌(1980-),男,国防科技大学博士研究生,E-mail: asdfstony@yahoo.com.cn.

Cyclostationarity based cascaded space-time anti-jamming processor designed to appeal to GPS receivers

SHI Bin-bin;CHENG Zhu;Qian Lin-jie;HUANGFU Kan   

  1. (School of Elec. Sci. and Eng., National Univ. of Defense Tech., Changsha  410073, China;)
  • Received:2009-05-24 Online:2010-08-20 Published:2010-10-11
  • Contact: SHI Bin-bin

摘要:

针对级联空时GPS抗干扰中联合空时滤波器组计算量大的问题,提出了一种联合空时滤波器组的实现方法.该方法运算复杂度较低,并具有模块化结构,使级联处理便于工程实现.在强干扰情况下,进行级联空时处理,先采用空时处理基本消除干扰,然后利用循环平稳性进行波束形成,可以进一步提高抗干扰能力.仿真实验证实了该方法的有效性.

关键词: 循环平稳, 空时处理, 干扰抑制, QR分解

Abstract:

In order to reduce the computational burden of space-time processing filter groups, a space-time processing filter groups designed method is proposed. This method can be easily implemented owing to low computational complexity and modular structures. Under the strong jamming scenario a cascaded space-time adaptive processing scheme is deviced with its first stage as ordinary space-time adaptive processing with a certain constraint and the second stage as the beam former aided with information extracted from the cyclic-covariance matrix. Experiments show that such a cascaded scheme could bring signal-to-noise-ratio improvement for the space-time processing.

Key words: cyclostationarity, space-time processing, interference suppression, QR decomposition