基于网络编码的衰落信道频谱感知算法
针对传统认知无线电网络中频谱状态转换频繁和频谱检测时延长的问题，提出基于随机线性网络编码的累积和能量检测频谱感知算法。该算法在主用户信道中引入随机线性网络编码，利用网络编码对频谱的整形作用，使频谱状态转换稀疏，频谱结构更规律化，减小频谱检测时延，提高系统吞吐率。此外，针对传统累积和能量检测算法抗衰落性能差的问题，通过比较该算法在五种衰落信道下的检测时延和吞吐率，研究该算法的抗衰落性能。实验结果表明，在一定的虚警概率下，该算法有效降低了检测时延，提高了吞吐率及抗衰落能力，能够更好地适应复杂的衰落信道环境。...
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| Published in | 电讯技术 Vol. 55; no. 9; pp. 964 - 971 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
广西大学 广西高校多媒体通信与信息处理重点实验室，南宁530004
2015
广西大学 计算机与电子信息学院，南宁530004 广西大学 广西多媒体通信与网络技术重点实验室培育基地，南宁530004 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-893X |
| DOI | 10.3969/j.issn.1001-893x.2015.09.004 |
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| Abstract | 针对传统认知无线电网络中频谱状态转换频繁和频谱检测时延长的问题，提出基于随机线性网络编码的累积和能量检测频谱感知算法。该算法在主用户信道中引入随机线性网络编码，利用网络编码对频谱的整形作用，使频谱状态转换稀疏，频谱结构更规律化，减小频谱检测时延，提高系统吞吐率。此外，针对传统累积和能量检测算法抗衰落性能差的问题，通过比较该算法在五种衰落信道下的检测时延和吞吐率，研究该算法的抗衰落性能。实验结果表明，在一定的虚警概率下，该算法有效降低了检测时延，提高了吞吐率及抗衰落能力，能够更好地适应复杂的衰落信道环境。 |
|---|---|
| AbstractList | 针对传统认知无线电网络中频谱状态转换频繁和频谱检测时延长的问题，提出基于随机线性网络编码的累积和能量检测频谱感知算法。该算法在主用户信道中引入随机线性网络编码，利用网络编码对频谱的整形作用，使频谱状态转换稀疏，频谱结构更规律化，减小频谱检测时延，提高系统吞吐率。此外，针对传统累积和能量检测算法抗衰落性能差的问题，通过比较该算法在五种衰落信道下的检测时延和吞吐率，研究该算法的抗衰落性能。实验结果表明，在一定的虚警概率下，该算法有效降低了检测时延，提高了吞吐率及抗衰落能力，能够更好地适应复杂的衰落信道环境。 TN929.5; 针对传统认知无线电网络中频谱状态转换频繁和频谱检测时延长的问题，提出基于随机线性网络编码的累积和能量检测频谱感知算法。该算法在主用户信道中引入随机线性网络编码，利用网络编码对频谱的整形作用，使频谱状态转换稀疏，频谱结构更规律化，减小频谱检测时延，提高系统吞吐率。此外，针对传统累积和能量检测算法抗衰落性能差的问题，通过比较该算法在五种衰落信道下的检测时延和吞吐率，研究该算法的抗衰落性能。实验结果表明，在一定的虚警概率下，该算法有效降低了检测时延，提高了吞吐率及抗衰落能力，能够更好地适应复杂的衰落信道环境。 |
| Abstract_FL | A cumulative summation( CUSUM) spectrum sensing algorithm based on random linear network coding( RLNC) is proposed to address the problem that spectrum states transfer frequently and the detec-tion delay is large in the traditional cognitive radio( CR) network. In the proposed algorithm,RLNC is in-troduced to primary user( PU) subnetwork in the CR network and shapes traffic. Consequently,transitions between spectrum states are expected to be less frequent and the spectrum structure is of more regularity, which,in turn,results in great improvement in detection delay and throughput rate. In addition,since the anti-fading performance of the traditional CUSUM algorithm is poor,this paper investigates the anti-fading performance of the proposed algorithm by comparing the detection delay and throughput rate when the re-ceived signal experiences five kinds of fading channels. Simulation results show that the proposed algorithm provides great improvement in detection delay, throughput rate and anti-fading performance at a certain false alarm probability,and it can be better adapted to the complex fading channel environment. |
| Author | 郑诗庭 蒙云番 邢杰 万海斌 覃团发 |
| AuthorAffiliation | 广西大学计算机与电子信息学院,南宁530004 广西大学广西多媒体通信与网络技术重点实验室培育基地,南宁530004 广西大学广西高校多媒体通信与信息处理重点实验室,南宁530004 |
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| Author_FL | XING Jie QIN Tuanfa ZHENG Shiting MENG Yunfan WAN Haibin |
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| Keywords | network coding 频谱感知 累积和能量检测 fading channel cognitive radio cumulative summation spectrum sensing 网络编码 认知无线电 衰落信道 |
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| Publisher | 广西大学 广西高校多媒体通信与信息处理重点实验室，南宁530004 广西大学 计算机与电子信息学院，南宁530004 广西大学 广西多媒体通信与网络技术重点实验室培育基地，南宁530004 |
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| SubjectTerms | 累积和能量检测 网络编码 衰落信道 认知无线电 频谱感知 |
| Title | 基于网络编码的衰落信道频谱感知算法 |
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