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2013 , Vol. 30 >Issue 5: 671 - 675

DOI: https://doi.org/10.7523/j.issn.2095-6134.2013.05.015

信息与电子科学

基于频域互相关的窄带干扰抑制方法

  • 张韬韬 ,
  • 张文逸
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  • 中国科学技术大学电子工程与信息科学系无线网络通信安徽省重点实验室, 合肥 230027

收稿日期: 2013-01-08

  修回日期: 2013-03-07

  网络出版日期: 2013-09-15

基金资助

国家自然科学基金(61071095);中国科学院百人计划资助 

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Suppression of narrowband interference using frequency-domain cross-correlation

  • ZHANG Tao-Tao ,
  • ZHANG Wen-Yi
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  • Wireless Information Network Laboratory, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China

Received date: 2013-01-08

  Revised date: 2013-03-07

  Online published: 2013-09-15

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摘要

在时域互相关弱信号检测方法中,针对窄带干扰会被误认为是目标信号而导致该方法失效的问题,提出一种基于频域互相关的窄带干扰抑制方法.该方法通过把整个频带划分成多个子频带并获得相应的统计特性,然后在每个子频带上完成基于单边判决理论的单比特判决,最后运用"n-out-of-m"的融合规则来综合所有子频带的判决结果完成最后判决.仿真结果表明,频域互相关法能有效地抑制窄带干扰,相比于时域互相关法具有明显的优势.

关键词： 宽带信号检测; 认知无线电; 频谱感知; 互相关; 窄带干扰

本文引用格式

张韬韬 , 张文逸 . 基于频域互相关的窄带干扰抑制方法[J]. 中国科学院大学学报, 2013 , 30(5) : 671 -675 . DOI: 10.7523/j.issn.2095-6134.2013.05.015

Abstract

Narrowband interference (NBI) may lead to failure of the time-domain cross-correlation (TDCC) weak signal detection approach since NBI is mistakenly detected as the desired signal. In order to solve this problem, a detection approach based on frequency-domain cross-correlation (FDCC) is proposed. The entire spectrum band is divided into multiple sub-bands, and the corresponding statistical characteristic of each sub-band is derived. Then according to the criterion of one-sided test, a one-bit decision is made in each sub-band. Finally, the decisions of all the sub-bands are processed jointly via the n-out-of-m fusion rule to make the final decision. Simulation results show that the proposed approach is promising for suppressing NBI and it distinctively outperforms the TDCC detection approach.

Key words： wideband signal detection; cognitive radio (CR); spectrum sensing; cross-correlation; narrowband interference (NBI)

参考文献

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