| 正弦信号四参数的高精度估计算法 |
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| 引用本文： | 吴义华,杨俊峰,程敬原,曹平.正弦信号四参数的高精度估计算法[J].中国科学技术大学学报,2006,36(6):625-629. |
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| 作者姓名： | 吴义华 杨俊峰 程敬原 曹平 |
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| 作者单位： | 中国科学技术大学近代物理系快电子学实验室,安徽合肥,230026 |
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| 基金项目： | 高比容电子铝箔的研究开发与应用项目;安徽省重点实验室基金 |
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| 摘 要： | 从正弦信号的任意间隔采样序列出发，结合频率的迭代法估计和幅度、相位以及直流偏移的最小二乘法估计，提出了估计正弦信号四个参数（幅度、频率、相位以及直流偏移）的新算法，即四参数估计法，并与直接快速傅立叶变换法和通用相位差法就估计精度进行了仿真比较。结果表明，四参数估计法不但精度较高、抗噪声能力较强，而且能对非等间隔采样信号进行参数估计。
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| 关 键 词： | 频率 相位 正弦信号 四参数估计法 通用相位差法 |
| 文章编号： | 0253-2778(2006)06-0625-05 |
| 收稿时间： | 06 10 2005 12:00AM |
| 修稿时间： | 03 1 2006 12:00AM |
High-accuracy estimation algorithm for 4 parameters of sine-wave |
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| WU Yi-hua,YANG Jun-feng,CHENG Jing-yuan,CAO Ping.High-accuracy estimation algorithm for 4 parameters of sine-wave[J].Journal of University of Science and Technology of China,2006,36(6):625-629. |
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| Authors: | WU Yi-hua YANG Jun-feng CHENG Jing-yuan CAO Ping |
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| Institution: | Fast Electronic Lab, Dept. of Modern Physics, University of Science and Technology of China, Hefei 230026,China |
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| Abstract: | A new algorithm named 4-parameter estimation algorithm was proposed to estimate the four parameters of sine-wave,namely,amplitude, frequency,phase and DC offset,from a sampled sequence with random sample intervals,based on the frequency estimation with iterated algorithm and amplitude,phase and DC offset estimation with least square algorithm.Simulations were performed to compare the estimation precision of the proposed algorithm with the two existing algorithms:direct FFT algorithm and universal phase difference correcting algorithm.The simulation results indicate that 4-parameter estimation algorithm not only has a higher!precision and noise immunity,but also can deal with parameter estimation from random sample interval sequences compared with the other two algorithms. |
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| Keywords: | frequency phase sine-wave 4-parameter estimation algorithm universal phase difference correcting algorithm |
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