| 宽带信号近似最大似然方位估计快速算法 |
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| 引用本文： | 金勇,黄建国,张立杰.宽带信号近似最大似然方位估计快速算法[J].航空学报,2008,29(5):1264-1268. |
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| 作者姓名： | 金勇 黄建国 张立杰 |
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| 作者单位： | 西北工业大学,航海学院,陕西,西安,710072 |
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| 基金项目： | 国家自然科学基金，航空科学基金，西北工业大学基础研究基金 |
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| 摘 要： | 针对短采样宽带信号近似最大似然方位估计（AML）计算量大的问题，将马尔可夫蒙特卡罗(MCMC)方法与近似最大似然方位估计相结合，提出一种基于完美抽样的近似最大似然方位估计快速算法（PAML）。该算法将AML算法的空间谱函数作为信号的概率分布函数，并利用完美抽样方法从该概率分布函数中抽样。与AML和遗传算法的对比实验研究表明，两目标情况下PAML算法在中低信噪比条件下的估计性能与AML和遗传算法性能相当，而计算量分别是二者的1/24和1/3。随着目标个数的增加，PAML算法的计算量优势将更加明显。
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| 关 键 词： | 宽带信号 短采样 近似最大似然估计 完美抽样 计算复杂度 方位估计 |
DOA Estimation Fast Algorithm for Wideband Sources |
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| Jin Yong,Huang Jianguo,Zhang Lijie.DOA Estimation Fast Algorithm for Wideband Sources[J].Acta Aeronautica et Astronautica Sinica,2008,29(5):1264-1268. |
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| Authors: | Jin Yong Huang Jianguo Zhang Lijie |
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| Institution: | Jin Yong,Huang Jianguo,Zhang Lijie(College of Marine Engineering,Northwestern Polytechnical University,Xi\'an 710072,China) |
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| Abstract: | Approximated maximum likelihood estimator (AML) has been shown to be the best performance in short sampling wideband sources DOA estimation. However, the computation burden of AML is very large. In order to lighten computation burden, Markov Monte Carlo (MCMC) methods are combined with approximated maximum likelihood DOA estimator. A novel approximated maximum likelihood DOA estimator based on perfect sampling (PAML) is proposed. PAML regards the power of the AML spectrum function as the target distribution... |
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| Keywords: | wideband source short sampling approximated maximum likelihood estimator perfect sampling computational complexity DOA estimation |
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