| 一种改善AR谱估计性能的分频段方法 |
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| 引用本文： | 陈进,史习智.一种改善AR谱估计性能的分频段方法[J].上海交通大学学报,1991,25(2):1-8. |
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| 作者姓名： | 陈进 史习智 |
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| 作者单位： | 上海交通大学振动、冲击、噪声研究所
(陈进)，上海交通大学振动、冲击、噪声研究所(史习智) |
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| 摘 要： | 本文研究了一种改善AR谱估计的有效和实用的方法,即在固定分辨率的情况下降低AR模型阶次,或在阶次一定(或降低)的情况下改进其谱估计分辨率的方法.该方法是通过对数据序列的频带进行限制,以减小分析频带外的噪声能量和通过选抽降低原序列采样率来实现的.仿真结果和实例表明,该方法对于宽带信号的AR谱估计是十分有效的.
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| 关 键 词： | AR模型 谱估计 采样 滤波 |
A Method for Improving AR Spectrum Estimation by Dividing Frequency Band |
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| Cheng Jin Shi Xizhi.A Method for Improving AR Spectrum Estimation by Dividing Frequency Band[J].Journal of Shanghai Jiaotong University,1991,25(2):1-8. |
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| Authors: | Cheng Jin Shi Xizhi |
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| Institution: | Cheng Jin Shi Xizhi |
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| Abstract: | This paper discusses an effective and practical method for impro-ving the AR spectrum estimation.By using the method,AR model's ordercan be reduced for the same frequency resolution,or the resolution of ARspectrum estimation can be improved in the same AR model's order.Thismethod is realized by means of limiting the frequency band of data series toreduce the noise of out-band,and by means of decimating to reduce the sam-piing rate.Both the simulation result and practical example show that thismethod is very effective for the AR spectrum estimation of wide band sign-als. |
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| Keywords: | AR model sampling filter spectrum estimation |
| 本文献已被 CNKI 维普 等数据库收录！ |
