| 频率估计的一种多段分频等长信号融合算法 |
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| 引用本文： | 涂亚庆,刘良兵. 频率估计的一种多段分频等长信号融合算法[J]. 电子学报, 2008, 36(9): 1852-1856 |
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| 作者姓名： | 涂亚庆 刘良兵 |
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| 作者单位： | 后勤工程学院信息工程系,重庆400016 |
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| 基金项目： | 重庆市自然科学基金(No.CSTC2006BB2122;CSTC2007BB2102) |
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| 摘 要： | 在低信噪比、被测频率持续时间短的情况下,为提高频率估计精度并适用于多段分频等长信号,本文提出一种分频等长融合算法.因各段信号的被测频率不等,故生成频域分析参数矩阵以实现同频化效果;因同频化后各段信号之间仍然相位不连续,故设计相位差补偿因子矩阵以达到相位连续信号的效果;生成搜索频率序列并得到具有特定形式的功率谱矩阵.为验证算法的正确性,给出了详细的数学证明.仿真表明本文算法适用于任意类型的多段分频等长信号,抗噪性好,频率估计精度比现有方法有较大提高.
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| 关 键 词： | 频率估计 多段分频等长信号 信息融合 |
| 收稿时间： | 2007-06-14 |
A Fusion Algorithm for Frequency Estimation of Multi-Section Signals with the Same Length and Known Frequency-Ratio |
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| TU Ya-qing,LIU Liang-bing. A Fusion Algorithm for Frequency Estimation of Multi-Section Signals with the Same Length and Known Frequency-Ratio[J]. Acta Electronica Sinica, 2008, 36(9): 1852-1856 |
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| Authors: | TU Ya-qing LIU Liang-bing |
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| Affiliation: | TU Ya-qing1,LIU Liang-bing2(1.Department of Information Engineering,Logistical Engineering University,Chongqing 400016,China,2.Department of Information Engineering,China) |
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| Abstract: | Under condition of low SNR and short duration of measured frequency,to increase precision of frequency estimation and be suitable for multi-section signals with the same length and known frequency-ratio,a frequency-division equilong fusion algorithm is proposed.For unequal measured frequencies of different sections,generate the parameter matrix for frequency-domain analysis to carry out frequency normalization treatment.For phase discontinuity among different sections even after frequency normalization,desi... |
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| Keywords: | frequency estimation multi-section signals with the same length and known frequency-ratio information fusion |
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