| 引用本文: | 陆凤波,黄知涛,姜文利.一种时频混叠的欠定混合通信信号盲分离算法.[J].国防科技大学学报,2010,32(5):80-85.[点击复制] |
| LU Fengbo,HUANG Zhitao,JIANG Wenli.Underdetermined Blind Separation of Non-disjoint Communication Signal in the Time-frequency Domain[J].Journal of National University of Defense Technology,2010,32(5):80-85[点击复制] |
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| 一种时频混叠的欠定混合通信信号盲分离算法 |
| 陆凤波, 黄知涛, 姜文利 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 针对衰减-延迟欠定混合通信信号的盲分离问题，提出了一种基于子空间最小距离的源信号估计算法，通过计算观测信号到混合矩阵列矢量张成子空间的距离，估计任意时频点同时存在的源信号数目以及当前源信号对应的混合矩阵列矢量，把欠定混合问题转化为超定问题，然后通过计算Moore-Penrose逆矩阵求解源信号，理论分析和仿真结果验证了算法的有效性。 |
| 关键词: 欠定混合 衰减－延迟混合 时频混叠 盲分离 |
| DOI： |
| 投稿日期：2010-04-22 |
| 基金项目:新世纪优秀人才支持计划资助项目(NCET) |
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| Underdetermined Blind Separation of Non-disjoint Communication Signal in the Time-frequency Domain |
| LU Fengbo, HUANG Zhitao, JIANG Wenli |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Aiming at the problem of underdetermined blind separation of attenuated and delayed mixing communication signal, this paper proposed an algorithm based on shortest distance to estimate original signals, calculating the shortest distance from mixing signal vector to subspace spanned of mixture vector firstly. Then it estimated the number of active original signal simultaneously, translated the problem of underdetermined mixture into over-determined mixture, and completed the estimation of original signal by solving the over-determined equation. The efficiency of the algorithm is proved in theory. Computer simulations show that the proposed recognition algorithm is high in performance. |
| Keywords: underdetermined mixture attenuate and delayed mixture non-disjoint in the time-frequency domain blind separation |
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