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v0.0.8 (unreleased)

  • Testing:
    • Add continuous integration via GitHub actions (testing, linting)
  • Misc:
    • Remove lint (unnecessary code)
    • Clean up comments

v0.0.7 (Oct 12, 2021)

  • Bugs:
    • Remove import czt from setup.py. This was causing a circular dependency.
  • Testing:
    • Compare this package against a stripped down version of the CZT algorithm.
    • Improve testing coverage.
  • Examples:
    • Plot residuals in examples.

v0.0.6 (Mar 22, 2021)

  • czt:
    • freq2time and time2freq:
      • Fix phase correction.
      • Remove scaling factor (hack).
      • Remove t_orig and f_orig arguments. Not needed anymore.
      • Don't return original frequency/time in time2freq and freq2time. Instead make a copy of the Numpy array.
    • Always default to FFT settings if output frequency/time array is not specified.
    • Fix M!=N error in czt.czt. Use proper k-range.
    • Optimize pd and skew_circulant_multiply. pd is now a similar speed as scipy.
  • Profiling:
    • Add benchmarking scripts using perfplot.
    • Add simple timing scripts.

v0.0.5 (Mar 2, 2021)

  • CZT:
    • Optimize code to run faster (approx. x4)
    • Change default t_method to 'ce' (fastest, see benchmark scripts)
  • Benchmark:
    • Use perfplots to iterate over a range of input sizes

v0.0.4 (Feb 27, 2021)

  • CZT:
    • Change default t_method to 'scipy' (fastest).
    • czt.iczt: add option to use algorithm 2 from Sukhoy & Stoytchev 2019.
    • Fix error in fft and ifft algorithms. Remove warnings now that they work.
    • Rename f_method: "std" -> "numpy", "fast" -> "recursive"
  • Benchmark:
    • Add benchmarks for czt.czt and czt.iczt.
  • Misc:
    • Remove windowing functions (unnecessary).

v0.0.3 (Feb 26, 2021)

  • CZT:
    • Added new t_method to czt. This method uses the new matmul_toeplitz function from Scipy. Requires scipy>=1.6.0.
    • Fixed argument order in scipy.linalg.toeplitz.
    • Use np.complex128 for A and W. Fixes a potential error if A or W is passed as an integer.
  • Setup:
    • Add dependencies for examples.
    • Add requriements.txt.
  • Testing:
    • Added new t_method to testing.
  • Misc:
    • More comments.

v0.0.2 (Dec 21, 2020)

  • CZT:
    • Add function for inverse CZT (iczt) using complex conjugate.
    • czt:
      • Fixed default phase of W so that CZT provides FFT by default.
      • Wrapped czt_simple into czt (can still accessed via simple=True argument).
    • time2freq:
      • Changed default frequency range to match FFT
      • Add normalization for arbitrary freq/time sweeps
    • Add functions to generate windows.
  • Testing:
    • Add test to compare CZT to analytic expression
    • Added test to compare CZT to FFT
    • Added test for ICZT
    • Added test for time-domain -> frequency-domain -> time-domain conversion
    • Remove redundant tests
  • Examples:
    • Add example calculating the time-domain response of a lossy waveguide
    • Automatic package reloading after each cell
  • setup.py:
    • Use py_modules instead of packages

v0.0.1 (Dec 2, 2020)

Initial release.