[1]刘洋,季薇,侯晓赟.一种改进的基于 OMP 重建的宽带频谱感知算法[J].计算机技术与发展,2013,(01):99-102.
　LIU Yang,JI Wei,HOU Xiao-yun.A Modified Spectrum Sensing Algorithm for Wideband Cognitive Radio Based on OMP[J].,2013,(01):99-102.
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一种改进的基于 OMP 重建的宽带频谱感知算法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2013年01期
页码:
99-102
栏目:
智能、算法、系统工程
出版日期:
1900-01-01

文章信息/Info

Title:
A Modified Spectrum Sensing Algorithm for Wideband Cognitive Radio Based on OMP
文章编号:
1673-629X（2013）01-0099-04
作者:
刘洋1; 2; 季薇1; 2; 侯晓赟1; 2
[1]南京邮电大学 通信与信息工程学院;[2]宽带无线通信与传感网技术教育部重点实验室
Author(s):
LIU Yang; JI Wei; HOU Xiao-yun
关键词:
认知无线电; 压缩感知; 宽带; 频谱感知
Keywords:
cognitive radio; compressed sensing; wideband; spectrum sensing
文献标志码:
A
摘要:
在宽带认知无线电中应用压缩感知理论进行频谱检测有效地降低了采样速率对硬件的要求,但是复杂的信号重建过程会影响频谱感知的实时性.针对这种情况,文中提出了一种改进的基于 OMP 重建的压缩频谱感知算法.改进算法在原有的 OMP 重建算法基础上,通过利用前一感知时刻获得的频谱占用信息,减少了重建算法的计算量.仿真表明,在频谱占用情况变化缓慢的认知无线网络中,改进算法能有效地减少重建耗时,并得到和原有方法基本一致的重建效果,提高了频谱感知的实时性
Abstract:
Compressed sensing is applied to spectrum detection in wideband cognitive radio. However,complex signal recovery processing affects real-time of spectrum sensing. To circumvent this problem,present a modified orthogonal matching pursuit algorithm for spectrum sensing based on OMP. The modified algorithm takes use of previous information of spectrum sensing to reduce the computation of recov-ery algorithm. Related experiments demonstrate that the modified algorithm shortens the time of recovery effectively in the environment that spectrum distribution changes slowly and the result of reconstruction is the same as the OMP approximately

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更新日期/Last Update: 1900-01-01