北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (5): 96-98,103.doi: 10.13190/j.jbupt.2015.05.018

• 研究报告 • 上一篇    下一篇

认知无线电中OFDM协作频谱感知技术及其优化

李映雪1, 钟士元1, 雷静2, 黄春明1, 姚诸香2   

  1. 1. 国网江西省电力公司经济技术研究院, 南昌 330043;
    2. 国网江西省电力公司, 南昌 330077
  • 收稿日期:2015-01-06 出版日期:2015-10-28 发布日期:2015-10-28
  • 作者简介:李映雪(1982—),男,工程师,博士,E-mail:liyingxueli@sina.com.
  • 基金资助:

    国家自然科学基金项目(60672132)

Optimization of Cooperative Spectrum Sensing Based on OFDM for Cognitive Radio Networks

LI Ying-xue1, ZHONG Shi-yuan1, LEI Jing2, HUANG Chun-ming1, YAO Zhu-xiang2   

  1. 1. State Grid Jiangxi Economic Research Institute, Nanchang 330043, China;
    2. State Grid Jiangxi Electric Power Company, Nanchang 330077, China
  • Received:2015-01-06 Online:2015-10-28 Published:2015-10-28

摘要:

利用正交频分复用信号包含循环前缀的特点,提出一种针对该信号的多用户场景下的协作检测模型,用最大化偏移系数的方法对系统的权值向量进行优化,得到优化权值向量的闭合表达式. 理论分析和仿真结果均表明,所提算法检测性能优于经典协作检测算法.

关键词: 循环前缀, 协作检测, 正交频分复用, 偏移系数, 性能优化

Abstract:

Utilizing the cyclic prefix characteristic of orthogonal frequency division multiplexing(OFDM) signal, this paper optimizes the system weight vector with the improved maximum deflection coefficient, proposes a multiuser cooperation detection algorithm, and obtains optimized weight vector expression. Theoretical analysis and simulation results demonstrate the remarkable improvement of proposed algorithm on detection performance compared with the classical cooperation detection algorithm.

Key words: cyclic prefix, cooperative sensing, deflection coefficient, orthogonal frequency division multiplexing, performance optimization

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