| 有色噪声中谐波频率的频域非线性预滤波估计方法 |
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| 引用本文： | 李玺,顾红,刘国岁.有色噪声中谐波频率的频域非线性预滤波估计方法[J].电子学报,2000,28(6):44-47. |
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| 作者姓名： | 李玺 顾红 刘国岁 |
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| 作者单位： | 北京理工大学电子工程系,北京 100081 |
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| 摘 要： | 基于谐波信号表现为频域中的 异常点 这一思路,利用滑动中值滤波器滤除数据异常点的能力,本文提出了未知有色噪声背景下谐波信号频率的一种高分辨估计方法.其突出特点是对噪声分布的强普适性,且算法实现简单.仿真结果验证了该方法的性能.
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| 关 键 词： | 信号处理 频率估计 有色噪声 非线性滤波 |
| 收稿时间： | 1999-01-29 |
A Method for Estimating the Rotation Angle of the ISAR Image |
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| LI Xi,GU Hong,LIU Guo-sui.A Method for Estimating the Rotation Angle of the ISAR Image[J].Acta Electronica Sinica,2000,28(6):44-47. |
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| Authors: | LI Xi GU Hong LIU Guo-sui |
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| Affiliation: | Dept.of Electronic Engineering,Beijing Institute of Technology,Beijing 100081,China |
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| Abstract: | In ISAR image technique,the rotation angle of the object is required to remove the phenomena of the migration through resolution cell and scale the cross range of the image.In this paper,a novel method for estimating the rotation angle is proposed.The core idea of this method is to use the Radon ambiguity transform (RAT) technique to estimate the FM rate of the multiple linear frequency modulated signals in different range cells.Then,the rotation angle can be obtained from the FM rate easily.The effectiveness of the method is confirmed by the simulation and the experimental results. |
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| Keywords: | inverse synthetic aperture radar(ISAR) rotation angle estimation radon ambiguity transform (RAT) linear frequency modulated signal |
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