西安电子科技大学学报 ›› 2018, Vol. 45 ›› Issue (6): 38-43.doi: 10.3969/j.issn.1001-2400.2018.06.007

• 研究论文 • 上一篇    下一篇

一种寄生转发系统的ADP干扰抑制技术

孙林海1,2,3;田斌1,2;黄俊桦1,2;张月婷1,2   

  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071;
    2. 西安电子科技大学 信息感知技术协同创新中心,陕西 西安 710071;
    3. 中国电子科技集团公司航天信息应用技术重点实验室,河北 石家庄 050081)
  • 收稿日期:2017-11-07 出版日期:2018-12-20 发布日期:2018-12-20
  • 作者简介:孙林海(1991-),男,西安电子科技大学硕士研究生,E-mail: sunlinhaixd@163.com
  • 基金资助:
    现代无线信息网络基础理论与技术“111”创新引智基地资助项目(B08038);中国电子科技集团公司航天信息应用技术重点实验室开放基金资助项目(**17629*009)

ADP interference suppression technique for the parasitic transmission system

SUN Linhai1,2,3;TIAN Bin1,2;HUANG Junhua1,2;ZHANG Yueting1,2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China;
    2. Collaborative Innovation Center of Information Sensing and Understanding, Xidian Univ., Xi'an 710071, China;
    3. CETC Key Lab. of Aerospace Information Applications, Shijiazhuang, 050081, China)
  • Received:2017-11-07 Online:2018-12-20 Published:2018-12-20

摘要: 针对寄生转发系统中的广播信号对寄生信号造成宽带干扰的问题,提出了一种基于幅度域处理的干扰抑制技术.运用简化的连续多项式逼近法来解析地表达扩频接收机中观测噪声的概率密度函数,并根据概率密度函数导出非线性函数,对接收信号进行幅度域处理以抑制干扰.该技术减少了概率密度函数估计不准确引入的误差,同时不需要任何训练序列.仿真结果表明,采用该干扰抑制技术的寄生转发系统可以有效地抑制广播信号的宽带干扰,即使干信比达20dB,误码率依然保持在10-3以内.

关键词: 卫星通信, 干扰抑制, 幅度域处理, 概率密度函数

Abstract:

Considering the broadband interference caused by the broadcast signal to the parasitic signal in the Parasitic Transmission System, this paper provides an interference suppression technology based on Amplitude Domain Processing(ADP). With the simplified method of Continuous Polynomial Approximation for expressing mathematically the Probability Density Function(PDF), the nonlinear function derived from this PDF can be applied to nonlinear processing in the amplitude domain of the received signal to suppress interference. This technique reduces the error from inaccuracy of PDF estimation and does not need any training sequence. Simulation results indicate that the Parasitic Transmission System with this technique can effectively suppress broadband interference of the QPSK modulated signal, and that the bit error rate(BER) of the system is about 10-3, even when the interference-to-signal ratio is 20dB.

Key words: satelite communication, interference suppression, amplitude domain processing, probability density

中图分类号: 

  • TN927+.2