Re: Phase Noise and 1/f noise Generation

On Sep 22, 9:32 am, Ikaro <ikarosi...@xxxxxxxxxxx> wrote:
1) Where should I set frequency offset and phase noise value in the code?
Because I found that the above filter code doesn't contain that
information.

There should not be any frequency offset. The noise spectra should
cover all the sampled spectrum (0-fs/2).

or, as much of that spectrum as possible/practical/necessary. you can
filter white noise into pink with a 3-pole, 3-zero filter over 10
octaves from 0.0009*Nyquist to 0.9*Nyquist within +/- 0.3 dB error.

The noise phase value is random, uniformly distributed betwee -pi/2
and pi/2.
You should filter the white noise signal using the FILTFILT so that
the IIR filter so that the filtered signal will have zero phase delay.

not true at all. since the phase of the white noise signal going in
is totally random, whatever phase that the filter adds to it does not
matter.

r b-j
.

Relevant Pages

  • Re: Sampling a signal corrupted by AWGN
    ... anti-aliasing filter is fed into a matched filter matched to the ... noise will get oversampled so that power spectral density of noise will ... make the upsampling unity gain as far as signal amplitude goes. ... We have flat spectrum in the frequency domain. ...
    (comp.dsp)
  • Re: randomized white noise = white noise?
    ... To have a big memory with the noise you want pre-stored. ... minutes, or less, of loud pink or white noise! ... a few different "types" of noise: white, pink, arbitrarily filtered, ... Then filter that with a relatively simple RC filter with poles ...
    (sci.electronics.design)
  • Re: Generating 1/f^2 and 1/f^3 noise
    ... generator, do an FT, weight the flat spectrum with the desired curve and ... filter of the same length as the data, ... it works for any desired noise spectrum. ...
    (comp.dsp)
  • Re: help with navtex/medium wave receiver sensitivity and decoding
    ... the system is too high to pick up anything but the strongest navtex ... above the background noise, and navtex signals are much lower power. ... Commercial stuff will filter, mix up to maybe a 60Mc IF to lose image ...
    (sci.electronics.design)
  • Re: Sampling a signal corrupted by AWGN
    ... anti-aliasing filter is fed into a matched filter matched to the ... noise will get oversampled so that power spectral density of noise will ... Secondly suppose we have signal-plus-noise ... make the upsampling unity gain as far as signal amplitude goes. ...
    (comp.dsp)
Loading