电子学报 ›› 2016, Vol. 44 ›› Issue (10): 2377-2383.DOI: 10.3969/j.issn.0372-2112.2016.10.014

• 学术论文 • 上一篇    下一篇

基于高阶统计量的L-DACS1系统自适应干扰消除技术研究

曾孝平, 贺渊, 简鑫, 黄杰, 李梦如   

  1. 重庆大学通信工程学院, 重庆 400030
  • 收稿日期:2015-04-14 修回日期:2016-02-01 出版日期:2016-10-25 发布日期:2016-10-25
  • 通讯作者: 简鑫
  • 作者简介:曾孝平,男,1956年生于四川广安,重庆大学教授、博士生导师,重庆大学通信工程学院院长,主要研究方向为空天地一体化、下一代移动通信、生物信号处理等.E-mail:zxp@cqu.edu.cn;贺渊,男,1991年生于陕西省洋县,重庆大学硕士研究生,主要研究方向为下一代移动通信、航空移动通信干扰抑制等.
  • 基金资助:

    国家自然科学基金重大研究计划(No.91438104);面上项目(No.61571069);青年项目(No.61501065);中央高校基本科研业务费资助项目(No.106112015CDJXY160002);重庆市研究生科研创新项目(No.CYS14005)

Adaptive Interference Cancellation for L-DACS1 by the Usage of High Order Statistics

ZENG Xiao-ping, HE Yuan, JIAN Xin, HUANG Jie, LI Meng-ru   

  1. College of Communication Engineering, Chongqing University, Chongqing 400030
  • Received:2015-04-14 Revised:2016-02-01 Online:2016-10-25 Published:2016-10-25

摘要:

针对L-DACS1(L-band Digital Aeronautical Communication System Type 1)与DME(Distance Measuring Equipment)信号在时域、频域和低阶统计域干扰抑制不理想的问题,本文将L-DACS1与DME时频域交叠的干扰场景建模为确定性信号叠加高斯有色噪声的干扰量化模型,根据两者在高阶统计域的差异特性,提出基于三阶累积量的自适应滤波算法,并引入对数螺线函数改进变步长机制,实现自适应DME干扰消除.仿真结果表明:所提算法具有更高的干扰抑制比和更低的误比特率,但复杂度较高.相关结论可为L-DACS1系统的实际部署提供参考.

关键词: L波段数字航空通信系统, 测距机系统, 高阶统计量, 干扰消除, 自适应滤波

Abstract:

To mitigate DME pulse interference over L-DACS1 and overcome the shortage of conventional solutions in time,frequency or second-order statistics domain,an innovative adaptive interference cancellation scheme by the usage of high-order statistics is introduced,namely CE-LMS.CE-LMS models the coexistence of L-DACS1 signal and DME interference as a deterministic signal plus colored Gaussian noises,and employs a cost function based on the three-order cumulant statistics and a variable step adjustment mechanism based on logarithmic function.All this together allow CE-LMS to eliminate the pulse-like DME interference from L-DACS1.Numerical results show that CE-LMS algorithm can achieve a better cancellation ratio and lower bit error rate with a increase in computational complexity,which may help to the deployment of L-DACS1.

Key words: L-DACS1(L-band Digital Aeronautical Communication System Type 1), DME(Distance Measuring Equipment), high-order statistic, interference cancellation, adaptive filtering

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