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• W1488667824 abstract "In this article we develop a fast high accuracy polar FFT. For a given two-dimensional signal of size N/spl times/N, the proposed algorithm's complexity is O(N/sup 2/ log N), just like in a Cartesian 2D-FFT. A special feature of our approach is that it involves only 1-D equispaced FFT's and 1D interpolations. A central tool in our approach is the pseudopolar FFT, an FFT where the evaluation frequencies lie in an over-sampled set of nonangularly equispaced points. The pseudopolar FFT plays the role of a halfway point-a nearly-polar system from which conversion to polar coordinates uses processes relying purely on interpolation operations. We describe the conversion process, and compare accuracy results obtained by unequally-sampled FFT methods to ours and show marked advantage to our approach." @default.
• W1488667824 created "2016-06-24" @default.
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• W1488667824 date "2004-07-08" @default.
• W1488667824 modified "2023-09-26" @default.
• W1488667824 title "Accurate and fast discrete polar fourier transform" @default.
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• W1488667824 doi "https://doi.org/10.1109/acssc.2003.1292319" @default.
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