| 循环谱时域平滑循环周期图法估计性能分析 |
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| 引用本文： | 郑鹏,王泽众,刘锋.循环谱时域平滑循环周期图法估计性能分析[J].计算机与数字工程,2011,39(11):30-34. |
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| 作者姓名： | 郑鹏 王泽众 刘锋 |
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| 作者单位： | 海军航空工程学院电子信息工程系,烟台,264001 |
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| 摘 要： | 针对有限数据条件下循环谱时域平滑循环周期图法的估计性能,首先推导了平滑前后的估计方差表达式,然后从平滑后的分辨率、可靠性、方差、计算量等几个方面,分析了时域平滑循环周期图法的估计性能,最后分析了不同窗函数对在估计过程中出现的循环谱泄露的抑制能力,得出了时域平滑是渐进一致估计以及在有限数据条件下存在最佳数据截短点数和窗函数的结论。仿真实验验证了结论的正确性。
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| 关 键 词： | 循环谱密度 时域平滑 循环周期图 估计 |
Performance Analysis for Cyclic Spectrum by Temporally Smoothed Cyclic Periodogram |
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| Zheng Peng,Wang Zezong,Liu Feng.Performance Analysis for Cyclic Spectrum by Temporally Smoothed Cyclic Periodogram[J].Computer and Digital Engineering,2011,39(11):30-34. |
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| Authors: | Zheng Peng Wang Zezong Liu Feng |
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| Affiliation: | Zheng Peng Wang Zezong Liu Feng(Department of Electronic and Information,Naval Aeronautical and Astronautical University,Yantai 264001) |
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| Abstract: | For the performance estimation for cyclic spectrum based on temporally smoothed cyclic periodogram,the variances expression of the estimation of CSD is deduced.Then the estimation performance is analyzed for the cyclic spectrum by temporally smoothed periodogram from resolution,reliability,variance and computation complexity in the case of limited data length.Then the performance of different windows for restraining cyclic leakage is analyzed.It is deduced that there exists the best taper point and window function for CSD estimation and temporally smoothed cyclic periodogram is asymptotically for estimation.Simulation results show that the conclusions are believable. |
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| Keywords: | cyclic spectrum density temporally smoothed cyclic periodgram estimation |
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