J4 ›› 2013, Vol. 40 ›› Issue (4): 102-107.doi: 10.3969/j.issn.1001-2400.2013.04.017

• 研究论文 • 上一篇    下一篇

深空通信中一种循环能量谱的信号检测方案

任光亮1;闵泉云1;卢满宏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. 北京遥测技术研究所,北京  100076)
  • 收稿日期:2012-12-25 出版日期:2013-08-20 发布日期:2013-10-10
  • 通讯作者: 任光亮
  • 作者简介:任光亮(1971-),男,教授,E-mail: glren@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(61072102);国家科技重大专项资助项目(2011ZX03001-007-01);中央高校基本科研业务费专项资金资助项目(K5051201043)

Novel cyclic energy spectrum detection method for deep space communications

REN Guangliang1;MIN Quanyun1;LU Manhong2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Beijing Research Institute of Telemetry, Beijing  100076, China)
  • Received:2012-12-25 Online:2013-08-20 Published:2013-10-10
  • Contact: REN Guangliang

摘要:

针对深空通信系统中接收信号信噪比极低且多普勒频移大的特点,提出了一种基于循环能量谱的信号检测新方案.该方案将信号循环谱中各个循环频率截面上的能量分布定义为循环能量谱,利用发射信号的循环能量谱特征与接收信号循环能量谱进行相关处理,并将此相关量作为检测统计量,以检测目标信号是否存在.计算机仿真结果表明,与目前已有的算法相比,该方案至少有6.5dB的信噪比增益,且对多普勒频移具有一定的稳健性.

关键词: 深空通信, 循环能量谱, 信号检测

Abstract:

According to the extremely low signal-to-noise ratio (SNR) of the received signal and the large Doppler frequency shift in the deep space communication systems, a novel detection method based on the cyclic energy spectrum is proposed. Firstly, the distribution of energy of the cycle frequency slices in the cyclic spectrum is defined as the cyclic energy spectrum. Then we correlate the cyclic energy spectrum of the received signal with that of the transmitted signal as the detecting statistic, which can determine whether the signal is present or not. Simulation results show that the proposed detector can obtain a gain under an SNR of more than 6.5dB compared with the existing detectors, and is robust to the Doppler frequency shift.

Key words: deep space communication, cyclic energy spectrum, signal detection

中图分类号: 

  • TN911