认知网络融合干扰消除的高效频谱感知机制

doi:10.11772/j.issn.1001-9081.2014.05.1243

计算机应用 ›› 2014, Vol. 34 ›› Issue (5): 1243-1246.DOI: 10.11772/j.issn.1001-9081.2014.05.1243

认知网络融合干扰消除的高效频谱感知机制

肖衡¹,吕绍和²

1. 三亚学院计算机公共教学部，海南三亚 572022
2. 国防科学技术大学并行与分布处理重点实验室，长沙 410073

收稿日期:2013-11-07 修回日期:2013-12-21 发布日期:2014-05-30 出版日期:2014-05-01
通讯作者: 吕绍和
作者简介:肖衡（1979-），女，湖南衡阳人，讲师，硕士，主要研究方向：计算机网络安全；吕绍和(1982-)，男，湖南永州人，助理研究员，博士，主要研究方向：无线网络、网络安全。
基金资助:
三亚市院地科技合作项目;国家自然科学基金资助项目

Efficient spectrum sensing mechanism with interference cancellation in cognitive radio network

XIAO Heng¹,LV Shaohe²

1. Department of Basic Computer Education, School of Sanya, Sanya Hainan 572022, China;
2. National Laboratory of Parallel and Distributed Processing, National University of Defense Technology, Changsha Hunan 410073, China

Received:2013-11-07 Revised:2013-12-21 Online:2014-05-30 Published:2014-05-01
Contact: LV Shaohe
Supported by:
;National Natural Science Foundation

摘要/Abstract

摘要：

针对无线认知网次用户快速寻找可用信道与检测主用户出现的问题，提出一种新的高效频谱感知机制。该机制通过感知与传输并发以减少感知的时间开销，利用干扰消除技术消除自身传输对感知的干扰；通过结合不同采样速率下信道状态的观察，实现宽频谱的信道感知；在传输中，利用特征匹配技术检测主用户的出现。实验结果表明，新机制可减少感知时间50%，提高吞吐量100%以上。因此，新机制有效降低了频谱感知的资源消耗，提高了认知通信的效率。

Abstract:

To facilitate the quick detection of primary user and discover the available channel in a wireless cognitive network, a novel spectrum sensing mechanism was proposed. The mechanism conducted spectrum sensing simultaneously with data transmission to reduce the sense time, and exploited the interference cancellation technique to cancel out the self-interference. Furthermore, by combining the Fourier transform results of multiple signals with different sampling rates, it could quickly detect the behavior of the wideband channel. Finally, during the transmission, the primary user was detected in time by the well-known signature matching method. The experimental results show that, the sense time is reduced by 50%, and the throughput gain is as large as 100%. In summary, the proposed scheme can effectively reduce the overhead of spectrum sensing and improve the efficiency of cognitive communication.

中图分类号:

TP393

肖衡吕绍和. 认知网络融合干扰消除的高效频谱感知机制[J]. 计算机应用, 2014, 34(5): 1243-1246.

XIAO Heng LV Shaohe. Efficient spectrum sensing mechanism with interference cancellation in cognitive radio network[J]. Journal of Computer Applications, 2014, 34(5): 1243-1246.

参考文献

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认知网络融合干扰消除的高效频谱感知机制

Efficient spectrum sensing mechanism with interference cancellation in cognitive radio network

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