| 快速小波变换及其在光纤陀螺信号处理中的应用 |
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| 引用本文： | 王其,徐晓苏.快速小波变换及其在光纤陀螺信号处理中的应用[J].大连海事大学学报(自然科学版),2007,33(4):10-13. |
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| 作者姓名： | 王其 徐晓苏 |
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| 作者单位： | 东南大学仪器科学与工程学院 南京210096 |
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| 基金项目： | “十一五”总装备部预研项目(51309020503)，国家自然科学基金资助项目(50575042)，国防“九七三”项目(973-61334)，教育部博士点专项科研基金资助项目(20050286026) |
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| 摘 要： | 为了提高光纤陀螺输出信号的精度和实时性,提出了一种适合在数字信号处理器(DSP)上实现的快速算法,该算法不需要传统小波变换中内插和抽取步骤,给出了相应的快速分解和快速重构实现公式,并采用半软阈值作为快速小波变换的重构阈值.实验结果表明:在静态和动态陀螺输出条件下,在TMS320C6713 DSP实现半软阈值快速小波变换处理信号时间比原来降低了一个数量级,而滤波精度与原来相当,并且易于硬件实现,完全满足光纤陀螺高精度和高实时性的要求.
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| 关 键 词： | 光纤陀螺 快速小波变换 信号处理 半软阈值 |
| 文章编号： | 1006-7736（2007）04-0010-04 |
| 收稿时间： | 2007-09-24 |
| 修稿时间： | 2007年9月24日 |
Fast wavelet transform and its application in fiber optic gyroscope signal processing |
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| WANG Qi,XU Xiao-su.Fast wavelet transform and its application in fiber optic gyroscope signal processing[J].Journal of Dalian Maritime University,2007,33(4):10-13. |
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| Authors: | WANG Qi XU Xiao-su |
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| Abstract: | To improve the precision and the real-time ability of fiber optic gyroscope(FOG),a fast algorithm was developed to be used in digital signal processor(DSP) in real-time without the processing of decimation and interpolation.Decomposition and reconstruction formula was given in detail and semi-soft threshold was selected as reconstruction threshold of fast wavelet transform.Experiment results show that time of processing the stationary and the dynamic FOG signal reduces greatly with the proposed algorithm realized in TMS320C6713DSP with the same precision as the traditional wavelet transform method.The semi-soft threshold fast wavelet transform is able to effectively shorten the signal processing time,improve the real-time ability and furthermore it is convenient for hardware implementation with the same precision. |
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| Keywords: | fiber optic gyroscope fast wavelet transform signal processing semi-soft threshold |
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