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Re: [Discuss-gnuradio] new peakfinding and averaging wxgui fft code (and
From: |
Martin Dvh |
Subject: |
Re: [Discuss-gnuradio] new peakfinding and averaging wxgui fft code (and dummy block has huge impact on usability fir filter) |
Date: |
Mon, 17 Jan 2005 06:08:51 +0100 |
User-agent: |
Mozilla Thunderbird 0.9 (X11/20041124) |
Eric I am Recompiling now (again;-).
I don't know if I will be doing the testing tonight (It is kind of late here in
the Netherlands)
I did however also finish my modified fft_sink in wxgui and put in on my
website.
I added the (default) option to average over several fft frames (default 100)
This gives a much quiter spectrum
The most interesting feature I also added is a peakfinding algorithm.
The spectrumwindow can now find peaks and shows the exact frequency and signal
level of these peaks.
def make_fft_sink_f (fg, parent, label, fft_size,
input_rate,show_peak_info=False,show_peak_markers=False,navg_frames=100,peak_searchwidth=-1):
#show_peak_info (default=False): if set to true the fft_window will show
the frequency and level of every big peak found in the spectrum
#show_peak_markers (default=False): if set to true the fft_window will
show a marker at every big peak found in the spectrum
#navg_frames (default=100): number of fft frames to average before showing it. If set to 100 or higher you get a much quiter spectrum (less
noisy and not changing very much every frame)
#peak_search_width(-1 gets you the default of 10 for a fft_size of 1024): number of neigbours the peakfinding algorithm will look at for
determing if something is a peak.
# A higher value means you get less
peaks detected
#Default the peakfinding algorithm determines a minimum signalstrength
threshold below which no peaks are detected
# you can override this with set_autopeakthreshold(False) and
set_peakthreshold(mythreshold) to use your own threshold
# the higher the threshold, the less peaks found
I modified Makefile.am,fftsink.py and added peakfind.py
You can all find them on:
http://www.olifantasia.com/projects/gnuradio/mdvh/wxgui/
I ported peakfind.py fromjava code from:
#ported from YALE - Yet Another Learning Environment
# Copyright (C) 2001-2004
# Simon Fischer, Ralf Klinkenberg, Ingo Mierswa,
# Katharina Morik, Oliver Ritthoff
# Artificial Intelligence Unit
# Computer Science Department
# University of Dortmund
# 44221 Dortmund, Germany
# email: address@hidden
# web: http://yale.cs.uni-dortmund.de/java
Which is GPL
The files need to be put into:
gr-wxgui/src/python/gnuradio/wxgui
I also tried to make a diff against cvs.
It is at
http://www.olifantasia.com/projects/gnuradio/mdvh/wxgui/fft_avg_and_peakfind.diff
But cvs diff does not seem to add any new local files. So you have to still add
peakfind.py manually.
How do I tell cvs diff to include local new files ???
greetings,
Martin
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