CZT (v0.0.7)

• 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.

CZT (v0.0.6)

• 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.

CZT (v0.0.5)

• 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

CZT (v0.0.4)

• 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).

CZT (v0.0.3)

• 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.

CZT (v0.0.2)

• 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

CZT (v0.0.1)

Initial release.