| 基于广义功率谱密度的分布压缩宽带频谱感知 |
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| 引用本文： | 赵春晖,腾志军,马爽.基于广义功率谱密度的分布压缩宽带频谱感知[J].吉林大学学报(工学版),2012,42(4):1015-1020. |
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| 作者姓名： | 赵春晖 腾志军 马爽 |
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| 作者单位： | 哈尔滨工程大学信息与通信工程学院,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金项目，高等学校博士学科点专项科研基金项目，哈尔滨市优秀学科带头人基金项目 |
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| 摘 要： | 为实现在Alpha稳定分布噪声下宽带频谱感知,扩展了传统功率谱密度概念,提出广义功率谱密度的概念,在此基础上提出基于广义功率谱密度的分布压缩宽带频谱感知。此方法能有效地抑制Alpha稳定分布噪声。首先,将接收的宽带信号进行分数低阶处理,计算自相关函数,再结合压缩感知原理将分数低阶自相关向量压缩和融合重构,最后经傅立叶变换得到广义功率谱密度。仿真结果表明,该方法具有良好的宽带功率谱密度估计性能,在Alpha稳定分布噪声下能较好地完成宽带频谱感知。
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| 关 键 词： | 通信技术 宽带频谱感知 广义功率谱密度 Alpha稳定分布噪声 分数低阶自相关 压缩感知 |
Distributed compressive wideband spectrum sensing based on generalized power spectrum density |
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| ZHAO Chun-hui,TENG Zhi-jun,MA Shuang.Distributed compressive wideband spectrum sensing based on generalized power spectrum density[J].Journal of Jilin University:Eng and Technol Ed,2012,42(4):1015-1020. |
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| Authors: | ZHAO Chun-hui TENG Zhi-jun MA Shuang |
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| Affiliation: | (College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | In order to achieve wideband spectrum sensing under Alpha stable noise,generalized power spectrum density is proposed,based on which the distributed compressive wideband spectrum sensing is put forward.This method can effectively restrain the Alpha stable noise.First,the received wideband signal is processed by fractional lower order,then,the autocorrelation vectors are calculated.Combined with the compressed sensing theory,the fractional generalized power spectrum density is derived by Fourier transform.Simulation results show that the method performs well in the estimation of the wideband power spectrum density,and can achieve wideband spectrum sensing under Alpha stable noise. |
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| Keywords: | communication wideband spectrum sensing generalized power spectrum density Alphastable noise fractional lower order autocorrelation compressive sensing |
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