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| 基于Quinn算法和相位差法的正弦波频率估计综合算法 | |
| 引用本文： | 谢胜,陈航,于平,林少兴.基于Quinn算法和相位差法的正弦波频率估计综合算法[J].信号处理,2011,27(5). |
| 作者姓名： | 谢胜 陈航 于平 林少兴 |
| 作者单位： | 1. 西北工业大学航海学院,陕西,西安,710072;广东湛江市91388部队,广东,湛江,524022 2. 西北工业大学航海学院,陕西,西安,710072 3. 广东湛江市91388部队,广东,湛江,524022 |
| 基金项目： | 武器装备预研基金资助项目 |
| 摘 要： | Quinn算法是正弦波频率估计中应用广泛、计算量小且稳定性较好的算法,但是在低信噪比时当信号频率靠近离散傅立叶变换(DFT)的量化频率时,Quinn算法估计误差较大;而改变窗长相位差法在这种情况下具有较高的估计精度,但当信号频率位于两相邻离散傅立叶变换(DFT)的量化频率中心区域时,其估计误差很大.根据这两者特点,本文提出了一种基于Quinn算法和改进的改变窗长相位差法的正弦波频率估计综合算法,给出理论计算过程及相关误差公式.计算机蒙特卡罗模拟仿真实验和性能分析表明了本文算法在计算量增加不大的情况下,在设定频率范围内能够提高频率估计的精确度和稳定性,其均方误差接近克拉美罗限且具有较低信噪比门限,整体估计性能优于Quinn算法和改变窗长相位差法,具有工程实用价值. |
| 关 键 词： | 频率估计 Quinn算法 改变窗长相位差法 克拉美罗限 |
Sinusoid wave frequency estimation combined algorithm based On Quinn algorithm and phase difference correction algorithm |
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| XIE Sheng,CHEN Hang,YU Ping,LIN Shao-xing.Sinusoid wave frequency estimation combined algorithm based On Quinn algorithm and phase difference correction algorithm[J].Signal Processing,2011,27(5). | |
| Authors: | XIE Sheng CHEN Hang YU Ping LIN Shao-xing |
| Affiliation: | XIE Sheng~(1,2)CHEN Hang~1 YU Ping~2 LIN Shao-xing~2 (1.College of Marine,Northwestern Polytechnical University,Shanxi,Xi'an,710072,China,2.Unit 91388,PLA,Guangdong,Zhanjiang,524022,China) |
| Abstract: | Quinn algorithm is a low computational complexity and steady method which is widely used in frequency estimation of single real sinusoid in additive white Gaussian noise is given,But it has a problem of large variance of frequency estimation when the signal frequency is closed to the DFT(Discrete Fourier Transform)discrete frequency in low SNR(Signal Noise Ratio);However, compared to Quinn algorithm,the window-length changing phase difference correction algorithm has good frequency estimation precision in t... |
| Keywords: | frequency estimation Quinn Algorithm window-length changing phase difference correction algorithm Cramer-Rao Lower Bound |
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