Fast- and Low-Complexity atan2(a,b) Approximation [Tips and Tricks]

  title={Fast- and Low-Complexity atan2(a,b) Approximation [Tips and Tricks]},
  author={Vicente Torres and Javier Valls and Richard Lyons},
  journal={IEEE Signal Processing Magazine},
  • Vicente Torres, Javier Valls, Richard Lyons
  • Published in
    IEEE Signal Processing…
  • Computer Science
  • This article presents a new entry to the class of published algorithms for the fast computation of the arctangent of a complex number. Our method uses a look-up table (LUT) to reduce computational errors. We also show how to convert a large-sized LUT addressed by two variables to an equivalent-performance smaller-sized LUT addressed by only one variable. In addition, we demonstrate how and why the use of follow-on LUTs applied to other simple arctan algorithms produce unexpected and interesting… CONTINUE READING

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