Sparse Eigenvectors of the Discrete Fourier Transform

Details Sparse Eigenvectors of the Discrete Fourier Transform Sparse Eigenvectors of the Discrete Fourier Transform

2009-11-15

arxiv.org/abs/0911.2922v1

Computer Science

Information Theory

Scientific paper

We construct a basis of sparse eigenvectors for the N-dimensional discrete
Fourier transform. The sparsity differs from the optimal by at most a factor of
four. When N is a perfect square, the basis is orthogonal.

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