介绍了分数阶傅里叶变换的原理及其对线性调频信号的处理优势。
Principle of fractional Fourier transform (FRFT) and alternation to that linear modulate frequency (LMF) treatment advantage were introduced.
摘要：提出一种基于混沌映射和分数阶傅里叶变换的数字水印算法。
Absrtact: a digital watermarking algorithm is proposed based on chaotic map and fractional Fourier transform.
主要讨论了一种将加紧支撑窗与分数阶傅里叶变换相结合的信号处理方法。
A new method that USES the tight support window signal together with the fractional Fourier transform (FRFT) is discussed.
定量的给出了球面波照射下实现任意阶非精确分数傅里叶变换时系统参数的选择定则。
A determining law for selecting the parameters of obtaining arbitrary order of the non-exact transform is also deducted quantitatively.
分数傅里叶变换具有空域和频域双域表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。
The FRFT has signal representation property both in space and frequency domain. The original image and the watermark is transformed with different orders to improve watermarking security.
分数傅里叶变换具有空域和频域双域表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。
The FRFT has signal representation property both in space and frequency domain. The original image and the watermark is transformed with different orders to improve watermarking security.
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