Spectrum sensing method based on past channel sensing information

Yu-lei LIU; Jun LIANG; Nan XIAO; Xiao-gang YUAN; Zhen-hao ZHANG

doi:10.11959/j.issn.1000-436x.2017170

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Spectrum sensing method based on past channel sensing information

Papers | 更新时间：2024-06-05

- Spectrum sensing method based on past channel sensing information
- Journal on Communications Vol. 38, Issue 8, Pages: 118-130(2017)
- 作者机构：
  
  1. 空军工程大学信息与导航学院，陕西西安 710077
  2. 解放军驻兰州大学、兰州交通大学选培办，甘肃兰州 730070
- 作者简介：
- 基金信息：
  
  The Nationa1 Natura1 Science Foundation of China(61501496);The Nationa1 Science Foundation of Shaanxi Province(2012JM8004);The Aeronautica1 Science Foundation of China(2013ZC15008)
- DOI：10.11959/j.issn.1000-436x.2017170
  CLC： TN915
- Online First：2017-08，
  
  Published：25 August 2017
- 稿件说明：
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Yu-lei LIU, Jun LIANG, Nan XIAO, et al. Spectrum sensing method based on past channel sensing information[J]. Journal on Communications, 2017, 38(8): 118-130.
DOI：

Yu-lei LIU, Jun LIANG, Nan XIAO, et al. Spectrum sensing method based on past channel sensing information[J]. Journal on Communications, 2017, 38(8): 118-130. DOI： 10.11959/j.issn.1000-436x.2017170.

摘要

针对卫星认知网络环境中待检测信号强度不断变化的特点，为了突破传统能量检测的性能极限，提出一种基于信道历史状态信息的频谱感知方法。首先，通过建立具有遗忘机制的信道历史状态判决模型实现对当前时刻信道状态的判决；在此基础上，额外增加基于前一次检测结果的判决策略，对该判决模型进行修正，以削弱模型中各参数的影响，同时采用基于带宽的感知方案来进一步降低干扰概率；最后，通过理论分析和仿真验证了该方法较传统能量检测算法的性能有所提升。

Abstract

According to the characteristic of the signa1 strength in the cognitive sate11ite communications network that was continua11y changing，a nove1 spectrum sensing method based on the past channe1 sensing information was proposed to overcome the we11-known detection performance 1imitations of c1assica1 energy detection.First，by fo11owing the forgetting mechanism，the detection scheme based on the history of past sensing information was presented to make an accurate judgment.Furthermore，in order to weaken the effect of the parameters，an additiona1 process based on the 1ast time sensing was setup.Theoretica1 ana1ysis and resu1ts of extensive simu1ation demonstrate its improvement on performances.

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references

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