电信科学 ›› 2016, Vol. 32 ›› Issue (1): 34-39.doi: 10.11959/j.issn.1000-0801.2016005

• 研究与开发 • 上一篇    下一篇

一种基于子频带匹配选择的宽带压缩频谱感知方法

闫玉芝,李有明,余明宸,付彩梅,周桂莉   

  1. 宁波大学通信技术研究所,浙江 宁波315211
  • 出版日期:2016-01-20 发布日期:2017-06-23
  • 基金资助:
    国家自然科学基金资助项目;宁波市自然科学基金资助项目

A wideband spectrum sensing approach based on sub-band matching selection

Yuzhi YAN,Youming LI,Mingchen YU,Caimei FU,Guili ZHOU   

  1. Institute of Communication Technology,Ningbo University,Ningbo 315211,China
  • Online:2016-01-20 Published:2017-06-23
  • Supported by:
    The National Natural Science Foundation of China;Ningbo Natural Science Foundation

摘要:

基于压缩感知的宽带频谱感知技术能有效降低过高的采样率和频谱感知复杂度。为了增强频谱感知中频谱信号的重构性能,根据宽带频谱信号具有的块稀疏特性,利用宽带频谱子频带划分的边界信息,提出一种改进OMP(MOMP)子频带匹配选择的宽带频谱重构算法,该算法旨在减少传统的OMP 算法在频谱重构中的迭代次数,增强频谱重构的稳定性。仿真结果表明,基于该算法的宽带频谱感知方法不仅提高了频谱重构的准确性,而且有效缩短了频谱重构时间,具有很好的宽带频谱感知性能。

关键词: 宽带频谱感知, 压缩感知, OMP算法

Abstract:

Wideband spectrum sensing technology based on compressed sensing can effectively reduce the high sampling rate and the complexity of spectrum sensing.During the sensing process,in order to enhance the reconstruction performance of the spectrum signal,a modified OMP sub-band matching selection algorithm for wideband spectrum reconstruction based on the prior knowledge of boundary information and the block sparse characteristics of wideband frequency signal was proposed.This method can reduce the number of iterations in spectrum reconstruction with OMP algorithm and enhance stability of spectrum reconstruction.Simulation results show that the proposed method can not only improve the accuracy of spectrum reconstruction,but also effectively shorten spectrum sensing timeand achieve better wideband spectrum sensing performance.

Key words: wideband spectrum sensing, compressed sensing, orthogonal matching pursuit algorithm

No Suggested Reading articles found!