| 基于稀疏系数和多级搜索策略的信号参数估计 |
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| 引用本文： | 秦国领,刘艳群,张广良,刘 旺,杨 力. 基于稀疏系数和多级搜索策略的信号参数估计[J]. 电讯技术, 2017, 57(9): 986-991. DOI: 10.3969/j.issn.1001-893x.2017.09.002 |
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| 作者姓名： | 秦国领 刘艳群 张广良 刘 旺 杨 力 |
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| 作者单位： | 酒泉卫星发射中心,甘肃 酒泉,732750 |
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| 摘 要： | 参数估计是盲信号处理的关键环节,对后续信号的侦察处理意义重大.针对当前压缩域信号参数估计问题,提出了一种新的信号参数估计算法,利用稀疏系数在不同测量矩阵中相同稀疏字典下位置相同的特点,实现了信号参数估计的区间预判;基于理论分析确定了多级搜索策略的最优级次,实现了稀疏字典原子数目的降低.仿真结果表明,算法在提高信号参数估计精度的同时显著降低了运算复杂度.
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| 关 键 词： | 信号参数估计 压缩感知 稀疏位置估计 多级搜索策略 正交匹配追踪 |
Signal parameter estimation based on sparse coefficient and multi-stage search strategy |
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| QIN Guoling,LIU Yanqun,ZHANG Guangliang,LIU Wang and YANG Li. Signal parameter estimation based on sparse coefficient and multi-stage search strategy[J]. Telecommunication Engineering, 2017, 57(9): 986-991. DOI: 10.3969/j.issn.1001-893x.2017.09.002 |
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| Authors: | QIN Guoling LIU Yanqun ZHANG Guangliang LIU Wang YANG Li |
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| Affiliation: | Jiuquan Satellite Launch Center,Jiuquan 732750,China |
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| Abstract: | Estimation of signal parameter is the key procedure in blind signal processing,which is very im-portant for subsequence signal capture analysis. In order to solve the problem of signal parameter estima-tion in compressed domain,a new algorithm for signal parameter estimation is proposed. According to the characteristics that the sparse coefficient has same location information between different measurement ma-trix in same sparse dictionary,it realizes the signal parameter interval pre-estimation. It uses the optimal multi-level search strategy to reduce atom numbers in sparse dictionary. Simulations of the linear fre-quence modulation( LFM) signal show that the algorithm obtains high estimation performance and decrea-ses computational complexity. |
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| Keywords: | signal parameter estimation compressed sensing sparse location estimation multi-stage search strategy orthogonal matching pursuit( OMP) |
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