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| 基于SNR比较的2次协作的感知无线电频谱检测 | |
| 引用本文： | 谢显中,燕涛. 基于SNR比较的2次协作的感知无线电频谱检测[J]. 重庆邮电大学学报(自然科学版), 2010, 22(6): 745-750. DOI: 10.3979/j.issn.1673-825X.2010.06.010 |
| 作者姓名： | 谢显中 燕涛 |
| 作者单位： | 重庆邮电大学,个人通信研究所,重庆,400065;重庆邮电大学,个人通信研究所,重庆,400065 |
| 基金项目： | 国家自然科学基金(60872037);重庆市自然科学基金（CSTC，2008BB2411；CSTC，2009AB2088）；重庆市教委应用基础研究基金（KJ080508） |
| 摘 要： | 在感知无线电系统中多径、阴影和隐藏终端等问题不可避免，协作频谱检测是解决这些问题的有效手段。针对目前协作频谱检测算法的不足，提出一种基于SNR判决的2次协作频谱检测算法，分析了非理想报告信道对性能的影响。数值分析和仿真结果表明，该方法能有效地提高检测概率，减少判决融合决策节点数量，以及减少传给最终融合中心的数据量。 |
| 关 键 词： | 感知无线电 协作频谱检测 SNR比较 2次协作 |
| 收稿时间： | 2009-11-16 |
Twice-cooperative spectrum detection based on SNR comparison in cognitive radio systems |
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| XIE Xian-zhong,YAN Tao. Twice-cooperative spectrum detection based on SNR comparison in cognitive radio systems[J]. Journal of Chongqing University of Posts and Telecommunications, 2010, 22(6): 745-750. DOI: 10.3979/j.issn.1673-825X.2010.06.010 | |
| Authors: | XIE Xian-zhong YAN Tao |
| Abstract: | Fading, shadowing and hidden terminal problems in cognitive radio systems can not be avoided. To overcome there problems, cooperative spectrum detection was proposed. But cooperative spectrum detection and local spectrum detection share a common lot. In this paper, we proposed a twice-cooperative spectrum detection algorithm based on SNR comparison in cognitive radio and analysed the non-ideal reporting channel. Numerical analysis and computer simulation suggest that the scheme greatly increases the probability of detection, reduces the node number to participate and the amount of data in decision fusion. |
| Keywords: | cognitive radio spectrum sensing SNR comparison twice-cooperative sensing |
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