On 5/3/22 1:57 AM, Matthias Welwarsky wrote:
Magnus, Jim - thanks a lot. Your post encouraged me to look especially into
flicker noise an how to generate it in the time domain. I now use randn() and
a low-pass filter. Also, I think I understood now how to create phase vs
frequency noise.
There's some papers out there (mentioned on the list in the past) about
synthesizing colored noise. Taking "White" noise and running it through
a filter is one approach. Another is doing an inverse FFT, but that has
the issue of needing to know how many samples you need. Although I
suppose one could do some sort of continuous overlapping window scheme
(which, when it comes right down to it is just another way of filtering)).
https://dl.acm.org/doi/abs/10.1145/368273.368574
or
C. A. Greenhall. Models for Flicker Noise in DSN Oscillators. The Deep
Space Network Progress Report, Volume XIII, pp. 183-193, February 15, 1973.
https://ipnpr.jpl.nasa.gov/progress_report/XIII/XIIIY.PDF
W. J. Hurd. Efficient Generation of Statistically Good Pseudonoise by
Linearly Interconnected Shift Registers. The Deep Space Network Progress
Report, Volume XI, pp. 1-1, October 15, 1972.
https://ipnpr.jpl.nasa.gov/progress_report/XI/XIQ.PDF
A Wideband Digital Pseudo-Gaussian Noise Generator
W. J. Hurd
https://ipnpr.jpl.nasa.gov/progress_report/III/IIIP.PDF
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