[1] Xie Shujing, Xia Weiwei, Shen Lianfeng, et al. A spectrum hole detection mechanismin cognitive radio networks applied in typical scenarios [J]. Journal of Southeast University (English Edition), 2012, 28 (4): 380-385. [doi:10.3969/j.issn.1003-7985.2012.04.002]
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A spectrum hole detection mechanismin cognitive radio networks applied in typical scenarios(
)
适用于认知无线电网络典型场景的空闲频谱检测方法
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 28
- Issue:
- 2012 4
- Page:
- 380-385
- Research Field:
- Information and Communication Engineering
- Publishing date:
- 2012-12-30
Info
- Title:
- A spectrum hole detection mechanismin cognitive radio networks applied in typical scenarios
- 适用于认知无线电网络典型场景的空闲频谱检测方法
- Author(s):
- Xie Shujing1; 2; Xia Weiwei1; Shen Lianfeng1
-
1National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
2Department of Electronic Information Engineering, Wuzhou College, Wuzhou 543002, China
- PACS:
- TN915
- DOI:
- 10.3969/j.issn.1003-7985.2012.04.002
- Abstract:
- A novel spectrum hole detection mechanism is proposed to improve the detection probability in cognitive radio networks for several typical scenarios. By removing the influence of the spatial false alarm(SFA), the spectrum hole detection probability of the secondary user under path loss and multi-path fading is derived. Meanwhile, the spectrum hole detection probability of multi-users cooperative sensing and that of single-user sensing in multi-bands are derived for comparison. Theoretical analyses and simulation results show that the spectrum hole detection probability of the proposed mechanism is inversely proportional to the sampling times and the area of the sensing region. The detection performance of the multi-users sensing is better than that of single-user sensing when with the AND logic fusion rule but worse when with the OR logic fusion rule. The detection probability is further decreased in the Rayleigh fading channel but it is greatly increased in multi-bands.
- 针对认知无线网络若干典型场景, 提出一种新的空闲频谱检测方法以提高其检测概率.通过消除空间虚警对频谱感知的影响, 得到认知用户在路径损耗和多径衰落作用时的空闲频谱检测概率, 同时得到多用户合作检测以及单用户在宽带环境检测时的空闲频谱检测概率并进行对比.理论分析和仿真结果表明:所提方法的空闲频谱检测概率与采样次数以及检测区域面积成反比;采用“与”融合规则进行多用户检测时效果好于单用户检测, 采用“或”融合规则时则相反;瑞利衰落会使检测概率进一步减小, 而增加带宽则会使其大大提高.
References:
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Memo
- Memo:
-
Biographies: Xie Shujing(1983—), female, graduate; Shen Lianfeng(corresponding author), male, professor; lfshen@seu.edu.cn.
Foundation items: The National Science and Technology Major Project(No.2011ZX03005-004-03), the National Natural Science Foundation of China(No.61171081, 60872004), the Natural Science Foundation of Guangxi Province(No.2011GXNSFB018075).
Citation: Xie Shujing, Xia Weiwei, Shen Lianfeng. A spectrum hole detection mechanism in cognitive radio networks applied in typical scenarios[J].Journal of Southeast University(English Edition), 2012, 28(4):380-385.[doi:10.3969/j.issn.1003-7985.2012.04.002]