| 多分量信号时频分析交叉项抑制研究 |
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| 引用本文： | 王军,李亚安.多分量信号时频分析交叉项抑制研究[J].探测与控制学报,2004,26(4):13-17. |
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| 作者姓名： | 王军 李亚安 |
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| 作者单位： | 西北工业大学航海工程学院,陕西,西安,710072 |
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| 摘 要： | 多分量信号的时频分布会产生交又项，采用固定核函数的时频分布，其适用的信号形式有很大的局限性。而基于信号的自适应径向高斯核函数时频分布，由于它的核函数随信号而自适应的改变，因此对交叉项有很好的抑制效果。文中以模糊函数理论为基础，分析了时频分析产生交叉项的原因，给出了以径向高斯函数为核函数的自适应时频分析优化算法。仿真结果表明，对于多分量信号，采用径向高斯核函数的自适应时频分析方法不仅对交叉项有很好的抑制作用，而且对信号的自分量具有较好的聚集作用。
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| 关 键 词： | 时频分布 交叉项 自适应径向高斯核 |
| 文章编号： | 1008-1194(2004)04-0013-05 |
The Research of Cross-component Suppression of Multi-component Signals Using Time Frequency Analysis |
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| WANG Jun,LI Ya-an.The Research of Cross-component Suppression of Multi-component Signals Using Time Frequency Analysis[J].Journal of Detection & Control,2004,26(4):13-17. |
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| Authors: | WANG Jun LI Ya-an |
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| Abstract: | Time-frequency distribution(TFD) of multi-component signal can produce cross-components,TFD with fixed kernels perform well only for limited signals.However TFD with adaptive radially-gaussian kernel can suppress the cross-component well,because its kernel vary with signal adaptively.This paper based on ambiguity function theory analyzes the cause of cross-components and gives the optimization algorithm of adaptive TFD with radially-gaussian kernel.Simulations indicate that the TFD with radially-gaussian kernel not only suppress cross-component well but also have good resolution for auto-component. |
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| Keywords: | time-frequency distribution(TFD) cross-component adaptive radially-gaussian kernel |
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