Joint spectrum sensing algorithm for multi-user based on coherent multiple-access channels in cognitive radio

doi:10.11772/j.issn.1001-9081.2017.04.0960

Journal of Computer Applications ›› 2017, Vol. 37 ›› Issue (4): 960-964.DOI: 10.11772/j.issn.1001-9081.2017.04.0960

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Joint spectrum sensing algorithm for multi-user based on coherent multiple-access channels in cognitive radio

WANG Sixiu, GUO Wenqiang, WANG Xiaojie

College of Computer Science and Engineering, Xinjiang University of Finance and Economics, Urumqi Xinjiang 830012, China

Received:2016-09-08 Revised:2016-12-28 Online:2017-04-10 Published:2017-04-19
Supported by:
This work is partially supported by the National Natural Science Foundation of China (61163066, 60902074), the National Natural Science Foundation of Xinjiang (2013211A032), the Foundation for Young Teachers Scientific Research and Cultivation of Xinjiang Uygur Autonomous Region (XJUEDU2014S042).

认知无线电中基于多址接入信道的多用户联合频谱感知算法

王思秀, 郭文强, 汪晓洁

新疆财经大学计算机科学与工程学院, 乌鲁木齐 830012

通讯作者: 王思秀
作者简介:王思秀(1981-),男,江苏徐州人,讲师,硕士,主要研究方向:信号分析、数据处理;郭文强(1975-),男,吉林安图人,教授,博士,主要研究方向:信息处理、信息安全;汪晓洁(1980-),女,安徽黄山人,讲师,硕士,主要研究方向:计算机网络。
基金资助:
国家自然科学基金资助项目（61163066，60902074）；新疆自然科学基金资助项目（2013211A032）；新疆维吾尔自治区高校科研计划青年教师科研培育基金资助项目（XJUEDU2014S042）。

Abstract

Abstract: For joint sensing of multiple Cognitive Users (CUs), considering the case of fading channels between the CU and the decision center, a joint spectrum sensing algorithm based on Multiple-Access Channels (MAC) was proposed. On the basis of the system structure and signal modeling, the asymptotic behavior and outage probability of the traditional MAC algorithm were analyzed. Under the constraint of the average transmit power of the CU, the transmit gain of the MAC algorithm was optimized to maximize the detection probability; and the problem of minimizing the number of CUs was also studied in the case of certain Quality of Service (QoS). Simulation results show that the proposed MAC algorithm can ensure good detection performance; in particular, it achieves exponential performance improvement in detection error probability.

Key words: Cognitive Radio (CR), spectrum sensing, Multiple-Access Channels (MAC), multi-user

摘要： 针对多用户联合感知场景问题，考虑次用户至决策中心之间有损信道的情况，提出了基于多址接入信道（MAC）的联合频谱感知算法。在系统结构和数学建模基础上，分析了传统MAC算法渐近性、中断概率等性能。在次用户平均发射功率约束下，以最大化检测概率为目标，对基于MAC算法中的发射增益进行优化；并考虑了一定服务质量情况下最小化次用户数目的问题。仿真结果表明，MAC算法能够保证良好的检测性能，以决策中心错误概率为例，提出的优化算法取得了指数级的性能提升。

关键词: 认知无线电, 频谱感知, 多址接入信道, 多用户

CLC Number:

TN919.72

WANG Sixiu, GUO Wenqiang, WANG Xiaojie. Joint spectrum sensing algorithm for multi-user based on coherent multiple-access channels in cognitive radio[J]. Journal of Computer Applications, 2017, 37(4): 960-964.

王思秀, 郭文强, 汪晓洁. 认知无线电中基于多址接入信道的多用户联合频谱感知算法[J]. 计算机应用, 2017, 37(4): 960-964.

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Joint spectrum sensing algorithm for multi-user based on coherent multiple-access channels in cognitive radio

认知无线电中基于多址接入信道的多用户联合频谱感知算法

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