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The modification of MA-CDFRFT algorithm used in computing discrete fractional Fourier transform
Author(s): 
Pages: 229-234
Year: Issue:  2
Journal: JOURNAL OF THE GRADUATE SCHOOL OF THE CHINESE ACADEMY OF SCIENCES

Keyword:  离散分数阶傅里叶变换离散傅里叶变换多角度中心型离散分数阶傅里叶变换快速傅里叶变换;
Abstract: 基于中心类型DFT矩阵特征分解的MA-CDFRFT(Multiangle Centered Discrete Fractional Fourier Transform)算法在计算一组离散分数阶傅里叶变换DFRFT(Discrete Fractional Fourier Transform)时充分利用FFT运算来减小运算量.结合偶数点离散傅里叶变换DFT(Discrete Fourier Transform)运算的对称性原理,通过数学推导将MA-CDFRFT算法中的一维对称性扩展到频率和变换阶数的二维平面上.利用这个二维对称性原理,改进算法将原算法的主要计算量减小了一半左右.仿真测试结果证明了改进算法的正确性.
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