Tham khảo Biến_đổi_Fourier_rời_rạc

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    • Magdy Tawfik Hanna, Nabila Philip Attalla Seif, and Waleed Abd El Maguid Ahmed (2004). “Hermite-Gaussian-like eigenvectors of the discrete Fourier transform matrix based on the singular-value decomposition of its orthogonal projection matrices”. IEEE Trans. Circ. Syst. I 51 (11): 2245–2254. 
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