| 基于频偏校正的正弦波频率估计算法 |
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| 引用本文： | 张英龙,刘渝,王旭东.基于频偏校正的正弦波频率估计算法[J].南京航空航天大学学报,2007,39(5):597-600. |
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| 作者姓名： | 张英龙 刘渝 王旭东 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,南京,210016;南京航空航天大学信息科学与技术学院,南京,210016;南京航空航天大学信息科学与技术学院,南京,210016 |
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| 摘 要： | 提出了一种新的正弦信号频率估计方法。利用FFT对信号频率作粗估计,然后对原信号下变频至基带。对基带信号作相位差分,估计频偏。最后对粗估计进行频率校正,使估计性能得到提高。在整个频段上该方法与R ife算法性能互补,在此基础上又提出了综合方法。仿真结果表明,该频率校正算法实现简单,运算量小,且性能不随被估计信号的频率分布而产生波动,在适度信噪比条件下均方根误差小于1.5倍的CRLB,具有广阔的应用前景。
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| 关 键 词： | 频率估计 相位差 正弦信号 信号处理 |
| 文章编号： | 1005-2615（2007）05-0597-04 |
| 修稿时间： | 2006-08-23 |
Sinusoid Frequency Estimation Method Based on Frequency Offset Correcting |
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| Zhang Yinglong,Liu Yu,Wang Xudong.Sinusoid Frequency Estimation Method Based on Frequency Offset Correcting[J].Journal of Nanjing University of Aeronautics & Astronautics,2007,39(5):597-600. |
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| Authors: | Zhang Yinglong Liu Yu Wang Xudong |
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| Abstract: | A new method for estimating the frequency of a sinusoid signal is proposed.Firstly,FFT is used to estimate coarse frequency and the base band signal is obtained by using digital down conversion technology.Then,a phase difference is performed on the base signal vector to compute frequency offset.Finally,the fine result is obtained by the offset of coarse frequency,thus improving the performance.The approach is complementary with Rife algorithm in the whole frequency segment,so a synthetic approach is presented.The simulation result demonstrates that the method based on frequency offset correcting is easily realized with low computation complexity,and has good frequency stability.And RMS is less than 1.5 times of CRLB under the proper SNR. |
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| Keywords: | frequency estimation phase difference sinusoid signal signal processing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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