implement noise generation as described in
https://ieeexplore.ieee.org/document/10466605
"An Algorithm to Estimate the Power Spectral Density From Allan Deviation"
https://github.com/kimonito98/Allan_to_PSD
this paper uses the noise-generation algorithm from:
J. Timmer and M. Koenig, “On generating power law noise,” Astron. Astrophys., vol. 300, p. 707, Aug. 1995 https://blog.ioces.com/matt/posts/colouring-noise/timmer-konig-1995.pdf