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Description: 分数阶傅立叶变换，chirp信号分解型实现分数阶傅立叶变换
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Size: 1066 |
Author: wiky |
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Description: 分数阶傅立叶变换，chirp信号分解型实现分数阶傅立叶变换-Fractional Fourier transform, chirp signal decomposition-type realization of fractional Fourier transform
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Size: 1024 |
Author: wiky |
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Description: 分数阶在线性调频信号（Chirp）中的应用相关程序，-Fractional linear FM signal (Chirp) application procedures,
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Size: 92160 |
Author: 金翔 |
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Description: 有两个程序一个是关于frft的源程序，一个是应用frft对线性调频信号进行检测的程序，原理是以变换阶数（不同的分数阶域）为变量对观测信号进行分数阶变换，形成信号能量在时频平面上的二维分布，在此平面上按阈值进行峰值点的二维搜索即可检测线性调频信号并估计其参数。-There are two procedures one on frft the source, one application frft linear FM signal detection process, the principle is to transform the order of (different fractional domain) as the independent variables on the observed fractional signal change, the formation of signal energy in two-dimensional time-frequency plane distribution in this plane, the peak threshold value by two-dimensional linear FM signal can be detected search and estimate its parameters.
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Size: 1024 |
Author: 王会彦 |
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Description: 用matlab对chirp信号进行了仿真，表现出了chirp信号的frft变换积聚效果-Chirp signal using matlab simulation, the performance of the chirp signal frft transform accumulation effect
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Size: 2048 |
Author: nicole |
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Description: 实现了chirp信号的分数阶傅立叶变换，表现出了其能量聚集效果，另外对单频、多频、高斯信号进行了分数阶傅立叶变换-The chirp signal Fractional Fourier Transform, showing the effect of its energy gathered addition of single-frequency, multi-frequency Gaussian signal Fractional Fourier Transform
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Size: 5120 |
Author: nicole |
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Description: 用matlab对chirp信号进行了仿真，表现出了chirp信号的frft的峰值搜索，参数估计-Using matlab for chirp signal simulation, showing a peak search chirp signal frft, the parameter estimates
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Size: 3072 |
Author: zhaoyun |
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Description: 数字水印文件和数字水印命令是数字水印技术在军事应用的两个重要应用。本文以一种基于分数阶傅里叶变换
(FRFT)的数字水印算法，使用chirp信号作为水印信息，嵌入到图像的分数阶傅里叶的加密域中。该算法有效地利用水印的
嵌入位置和FRFT的阶次作为密钥的同时，还利用chirp信号在分数阶傅里叶域的特点，可以很方便的检测到水印，具有良好
的不可见性和安全性的同时，还能够抵抗很强的JPEG压缩和噪声的攻击，对剪切、滤波等操作也有一定的鲁棒性。-Watermarking files and digital watermarking command are two important applications of digital watermarking technology for military applications in. In this paper, based on fractional Fourier transform
(FRFT) digital watermarking algorithm using chirp signal as the watermark information is embedded into the image encryption fractional Fourier domain. The effective use of watermarking algorithm
FRFT embedding position and at the same time as the order of the keys, but also take advantage of the characteristics of chirp signals in fractional Fourier domain, and can easily detect the watermark, with good
Invisibility and safety, it is also highly resistant to JPEG compression and noise attacks, shear, filtering and other operations also has certain robustness.
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Size: 1003520 |
Author: baibai |
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Description: FRFT和线性调频信号中的子程序，FRFT中的a，也就是需要估计的角度。两个程序需要一起使用-FRFT and chirp signal subroutine, FRFT of a, is the need to estimate the angle. Both programs need to be used together
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Size: 1024 |
Author: chenxi |
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Description: 分数阶傅里叶变换对chirp信号进行解调，同时对比匹配滤波器的解调性能-Fractional Fourier transform of the chirp signal is demodulated, and the demodulation performance comparison of the matched filter
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Size: 119808 |
Author: Lei Liu |
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