一种基于授权信道特性的认知无线电频谱检测算法

刘允; 彭启琮; 邵怀宗; 彭启航; 王玲

doi:10.7498/aps.62.078406

摘要

针对认知无线电系统中频谱检测的频率直接影响系统容量以及与授权用户产生冲突的概率问题,分析了授权用户频谱使用的特性, 对授权用户行为进行统计建模, 提出一种自适应频谱检测算法. 引入控制因子, 在保证认知无线电系统稳定性的约束下, 自适应调整频谱感知的频率从而提高频谱利用率并减小系统冲突概率和检测开销, 进而降低了系统的能量消耗. 仿真结果表明, 该算法在保证不对授权用户产生干扰和一定的系统稳定性条件下, 有效地提高了系统的容量,并且具有良好的实用性和灵活性.

关键词:

Abstract

In a cognitive radio (CR) network, the system throughput and the probability of collision between primary users (PUs) and CR users are directly influenced by the frequency of spectrum sensing. This paper focuses on adaptively scheduling spectrum sensing such that negative impacts to the performance of the CR network are minimized. Based on an in-depth analysis into the spectral usage patterns of PUs, an adaptive spectrum detecting algorithm is proposed. By introducing a "control factor", the proposed algorithm can adaptively schedule the spectrum sensing, while maintaining the CR system stability, so as to increase spectral utilization efficiency, as well as reducing the probability of collision between PUs and CR users. Therefore, the energy consumption of the CR system is reduced. Simulations show that the proposed algorithm can effectively increase the system throughput, with minimal interference to primary users while ensuring the system stability. Meanwhile, it is shown that the proposed algorithm has low implementation complexity for practical applications.

Keywords:

作者及机构信息

1.
电子科技大学通信与信息工程学院,成都 611731

基金项目: 国家自然科学基金(批准号: 60901018, 6090202, 611010347)、国家科技重大专项(批准号: 2010ZX03003-002-01, 2011ZX03001-006-01, 2010ZX03007-003) 和中央高校基本科研业务费专项资金(批准号: ZYGX2010J003)资助的课题.

Authors and contacts

1.
School of Communication and Technology Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 60901018, 6090202, 611010347), the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant Nos. 2010ZX03003-002-01, 2011ZX03001-006-01, 2010ZX03007-003), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. ZYGX2010J003).

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施引文献

[1]	Conti J P 2006 Communications Engineer 4 20
[2]	FCC 2003 FCC Document ET Docket 3 108
[3]	Haykin S 2005 IEEE J. Sel. Areas Commun. 23 201
[4]	Zheng S L, Yang X N 2012 Acta Phys. Sin. 61 148402 (in Chinese) [郑仕链, 杨小牛 2012 61 148402]
[5]	He A, Amanna A, Tsou T, Chen X, Datla D, Gaeddert J, Newman T, Hasan S M, Volos H, Reed J H, Bose T 2011 J. Commun. 6 340
[6]	Zu Y X, Zhou J 2011 Acta Phys. Sin. 60 079501 (in Chinese) [俎云霄, 周杰 2011 60 079501]
[7]	Zhao Z J, Xu S Y, Zheng S L, Yang X N 2009 Acta Phys. Sin. 58 5118 (in Chinese) [赵知劲, 徐世宇, 郑仕链, 杨小牛 2009 58 5118]
[8]	Sun B, Jiang J J 2011 Acta Phys. Sin. 60 110701 (in Chinese) [孙彪, 江建军 2011 60 110701]
[9]	Chai Z Y, Chen L, Zhu S F 2012 Acta Phys. Sin. 61 058801 (in Chinese) [柴争义, 陈亮, 朱思峰 2012 61 058801]
[10]	Huang L Y, Liu C, Wang S P 2010 Journal on Commun. 31 136 (in Chinese) [黄丽亚, 刘臣, 王锁萍 2010 通信学报 31 136]
[11]	Zheng S L, Lou C Y, Yang X N 2010 Acta Phys. Sin. 59 3611 (in Chinese) [郑仕链, 楼才义, 杨小牛 2010 59 3611]
[12]	Sun B, Hua J J 2011 Acta Phys. Sin. 60 110701 (in Chinese) [孙彪, 江建军 2011 60 110701]
[13]	Zhou J, Zu Y X 2010 Acta Phys. Sin. 59 7508 (in Chinese) [周杰, 俎云霄 2010 59 7508]
[14]	Liang Y C, Zeng Y, Peh E, Hoang T 2008 IEEE Trans. Commun. 7 1326
[15]	Zhao Q, Krishnamachari B, Liu K 2008 IEEE Trans. Wireless Commun 7 5431
[16]	Hoang A T, Liang Y C, Wong D T C, Zeng Y, Zhang R 2009 IEEE Trans. Wireless Commun. 8 1206
[17]	Zhao Q, Geirhofer S, Tong L, Sadler B M 2008 IEEE Trans. Signal Process. 56 785
[18]	Kim H, Shin K G 2008 IEEE Trans. Mobile Computing 7 533
[19]	Han N, Shon S H, Chung J H, Kim J M 2006 The 8th International Conference on Advanced Communication Technology Phoenix Park Feb. 20-22, 2006 p1770
[20]	Zeng Y H, Liang Y C 2009 IEEE Trans. Commun. 57 1784
[21]	Zhang Y, Feng C Y, Guo C L 2008 Journal of Beijing University of Posts and Telecommunications 31 128 (in Chinese) [张宇, 冯春燕, 郭彩丽 2008 北京邮电大学学报 31 128]
[22]	Su X, Shen S Q, Feng Z Y, Chen X 2009 Journal of Electronics & Information Technology 31 2801 (in Chinese) [苏曦, 沈树群, 冯志勇, 陈星 2009 电子与信息学报 31 2801]
[23]	Guo C L, Zeng Z M, Feng C Y, Liu Z Q 2009 Journal of Electronics & Information Technology 31 920 (in Chinese) [郭彩丽, 曾志民, 冯春燕, 刘子琦 2009 电子与信息学报 31 920]
[24]	Choi K W 2010 IEEE Trans. Vehicular Technology 59 992
[25]	Hoang A T, Liang Y H, Zeng Y H 2010 IEEE Trans. Commun. 58 235
[26]	Brillinger D 1985 IEEE Trans. Signal Process 33 1076
[27]	Lee W Y, Akyildiz I F 2008 IEEE Trans. Wireless Commun. 7 3845
[28]	Zhao Q, Tong L, Swami A, Chen Y X 2007 IEEE J. Sel. Areas Commun. 25 589
[29]	Sriramk, Whitt W 1986 IEEE J. Sel. Areas Commun. 4 833
[30]	Willkomm D, Machiraju S, Bolot J, Wolosz A IEEE Symposium in Dy SPAN Chicago, IL, USA 2008 p1

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