From 57b846ed17b0084563988d7817302f4f5b0d8e3c Mon Sep 17 00:00:00 2001 From: trondeau Date: Sat, 25 Oct 2008 22:11:31 +0000 Subject: [PATCH] added real PSD plotting tool with optional spectrogram plot. git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9846 221aa14e-8319-0410-a670-987f0aec2ac5 --- gr-utils/src/python/Makefile.am | 3 + gr-utils/src/python/gr_plot_psd.py | 281 +++++++++++++++++++++++++++ gr-utils/src/python/gr_plot_psd_c.py | 47 +++++ gr-utils/src/python/gr_plot_psd_f.py | 47 +++++ 4 files changed, 378 insertions(+) create mode 100755 gr-utils/src/python/gr_plot_psd.py create mode 100755 gr-utils/src/python/gr_plot_psd_c.py create mode 100755 gr-utils/src/python/gr_plot_psd_f.py diff --git a/gr-utils/src/python/Makefile.am b/gr-utils/src/python/Makefile.am index db0d688f..965f74c8 100644 --- a/gr-utils/src/python/Makefile.am +++ b/gr-utils/src/python/Makefile.am @@ -36,6 +36,9 @@ bin_SCRIPTS = \ gr_plot_fft.py \ gr_plot_fft_c.py \ gr_plot_fft_f.py \ + gr_plot_psd.py \ + gr_plot_psd_c.py \ + gr_plot_psd_f.py \ gr_plot_float.py \ gr_plot_int.py \ gr_plot_iq.py \ diff --git a/gr-utils/src/python/gr_plot_psd.py b/gr-utils/src/python/gr_plot_psd.py new file mode 100755 index 00000000..b469d0cc --- /dev/null +++ b/gr-utils/src/python/gr_plot_psd.py @@ -0,0 +1,281 @@ +#!/usr/bin/env python +# +# Copyright 2007,2008 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +try: + import matplotlib + matplotlib.use('TkAgg') + matplotlib.interactive(True) +except ImportError: + print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)" + raise SystemExit, 1 + +try: + import scipy + from scipy import fftpack +except ImportError: + print "Please install SciPy to run this script (http://www.scipy.org/)" + raise SystemExit, 1 + +try: + from pylab import * +except ImportError: + print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)" + raise SystemExit, 1 + +from optparse import OptionParser +from scipy import log10 + +class gr_plot_psd: + def __init__(self, datatype, filename, options): + self.hfile = open(filename, "r") + self.block_length = options.block + self.start = options.start + self.sample_rate = options.sample_rate + self.psdfftsize = options.psd_size + self.specfftsize = options.spec_size + + self.dospec = options.enable_spec # if we want to plot the spectrogram + + self.datatype = getattr(scipy, datatype) #scipy.complex64 + self.sizeof_data = self.datatype().nbytes # number of bytes per sample in file + + self.axis_font_size = 16 + self.label_font_size = 18 + self.title_font_size = 20 + self.text_size = 22 + + # Setup PLOT + self.fig = figure(1, figsize=(16, 12), facecolor='w') + rcParams['xtick.labelsize'] = self.axis_font_size + rcParams['ytick.labelsize'] = self.axis_font_size + + self.text_file = figtext(0.10, 0.95, ("File: %s" % filename), weight="heavy", size=self.text_size) + self.text_file_pos = figtext(0.10, 0.92, "File Position: ", weight="heavy", size=self.text_size) + self.text_block = figtext(0.35, 0.92, ("Block Size: %d" % self.block_length), + weight="heavy", size=self.text_size) + self.text_sr = figtext(0.60, 0.915, ("Sample Rate: %.2f" % self.sample_rate), + weight="heavy", size=self.text_size) + self.make_plots() + + self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True) + self.button_left = Button(self.button_left_axes, "<") + self.button_left_callback = self.button_left.on_clicked(self.button_left_click) + + self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True) + self.button_right = Button(self.button_right_axes, ">") + self.button_right_callback = self.button_right.on_clicked(self.button_right_click) + + self.xlim = self.sp_iq.get_xlim() + + self.manager = get_current_fig_manager() + connect('draw_event', self.zoom) + connect('key_press_event', self.click) + show() + + def get_data(self): + self.position = self.hfile.tell()/self.sizeof_data + self.text_file_pos.set_text("File Position: %d" % self.position) + self.iq = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length) + #print "Read in %d items" % len(self.iq) + if(len(self.iq) == 0): + print "End of File" + else: + tstep = 1.0 / self.sample_rate + self.time = [tstep*(self.position + i) for i in xrange(len(self.iq))] + + self.iq_psd, self.freq = self.dopsd(self.iq) + + def dopsd(self, iq): + ''' Need to do this here and plot later so we can do the fftshift ''' + overlap = self.psdfftsize/4 + winfunc = scipy.blackman + psd,freq = self.sp_psd.psd(iq, self.psdfftsize, self.sample_rate, + window = lambda d: d*winfunc(self.psdfftsize), + noverlap = overlap, visible=False) + psd = 10.0*log10(abs(fftpack.fftshift(psd))) + return (psd, freq) + + def make_plots(self): + # if specified on the command-line, set file pointer + self.hfile.seek(self.sizeof_data*self.start, 1) + + iqdims = [[0.075, 0.2, 0.4, 0.6], [0.075, 0.55, 0.4, 0.3]] + psddims = [[0.575, 0.2, 0.4, 0.6], [0.575, 0.55, 0.4, 0.3]] + specdims = [0.2, 0.125, 0.6, 0.3] + + # Subplot for real and imaginary parts of signal + self.sp_iq = self.fig.add_subplot(2,2,1, position=iqdims[self.dospec]) + self.sp_iq.set_title(("I&Q"), fontsize=self.title_font_size, fontweight="bold") + self.sp_iq.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold") + self.sp_iq.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold") + + # Subplot for PSD plot + self.sp_psd = self.fig.add_subplot(2,2,2, position=psddims[self.dospec]) + self.sp_psd.set_title(("PSD"), fontsize=self.title_font_size, fontweight="bold") + self.sp_psd.set_xlabel("Frequency (Hz)", fontsize=self.label_font_size, fontweight="bold") + self.sp_psd.set_ylabel("Power Spectrum (dBm)", fontsize=self.label_font_size, fontweight="bold") + + self.get_data() + + self.plot_iq = self.sp_iq.plot([], 'bo-') # make plot for reals + self.plot_iq += self.sp_iq.plot([], 'ro-') # make plot for imags + self.draw_time() # draw the plot + + self.plot_psd = self.sp_psd.plot([], 'b') # make plot for PSD + self.draw_psd() # draw the plot + + + if self.dospec: + # Subplot for spectrogram plot + self.sp_spec = self.fig.add_subplot(2,2,3, position=specdims) + self.sp_spec.set_title(("Spectrogram"), fontsize=self.title_font_size, fontweight="bold") + self.sp_spec.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold") + self.sp_spec.set_ylabel("Frequency (Hz)", fontsize=self.label_font_size, fontweight="bold") + + self.draw_spec() + + draw() + + def draw_time(self): + reals = self.iq.real + imags = self.iq.imag + self.plot_iq[0].set_data([self.time, reals]) + self.plot_iq[1].set_data([self.time, imags]) + self.sp_iq.set_xlim(min(self.time), max(self.time)) + self.sp_iq.set_ylim([1.5*min([min(reals), min(imags)]), + 1.5*max([max(reals), max(imags)])]) + + def draw_psd(self): + self.plot_psd[0].set_data([self.freq, self.iq_psd]) + self.sp_psd.set_ylim([min(self.iq_psd)-10, max(self.iq_psd)+10]) + + def draw_spec(self): + overlap = self.specfftsize/4 + winfunc = scipy.blackman + self.sp_spec.clear() + self.sp_spec.specgram(self.iq, self.specfftsize, self.sample_rate, + window = lambda d: d*winfunc(self.specfftsize), + noverlap = overlap, xextent=[min(self.time), max(self.time)]) + + def update_plots(self): + self.draw_time() + self.draw_psd() + + if self.dospec: + self.draw_spec() + + self.xlim = self.sp_iq.get_xlim() # so zoom doesn't get called + draw() + + def zoom(self, event): + newxlim = self.sp_iq.get_xlim() + if(newxlim != self.xlim): + self.xlim = newxlim + xmin = max(0, int(ceil(self.sample_rate*(self.xlim[0] - self.position)))) + xmax = min(int(ceil(self.sample_rate*(self.xlim[1] - self.position))), len(self.iq)) + + iq = self.iq[xmin : xmax] + time = self.time[xmin : xmax] + + iq_psd, freq = self.dopsd(iq) + + self.plot_psd[0].set_data(freq, iq_psd) + self.sp_psd.axis([min(freq), max(freq), + min(iq_psd)-10, max(iq_psd)+10]) + + draw() + + def click(self, event): + forward_valid_keys = [" ", "down", "right"] + backward_valid_keys = ["up", "left"] + + if(find(event.key, forward_valid_keys)): + self.step_forward() + + elif(find(event.key, backward_valid_keys)): + self.step_backward() + + def button_left_click(self, event): + self.step_backward() + + def button_right_click(self, event): + self.step_forward() + + def step_forward(self): + self.get_data() + self.update_plots() + + def step_backward(self): + # Step back in file position + if(self.hfile.tell() >= 2*self.sizeof_data*self.block_length ): + self.hfile.seek(-2*self.sizeof_data*self.block_length, 1) + else: + self.hfile.seek(-self.hfile.tell(),1) + self.get_data() + self.update_plots() + +def find(item_in, list_search): + try: + return list_search.index(item_in) != None + except ValueError: + return False + +def setup_options(): + usage="%prog: [options] input_filename" + description = "Takes a GNU Radio binary file (with specified data type using --data-type) and displays the I&Q data versus time as well as the power spectral density (PSD) plot. The y-axis values are plotted assuming volts as the amplitude of the I&Q streams and converted into dBm in the frequency domain (the 1/N power adjustment out of the FFT is performed internally). The script plots a certain block of data at a time, specified on the command line as -B or --block. The start position in the file can be set by specifying -s or --start and defaults to 0 (the start of the file). By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time and frequency axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples. Finally, the size of the FFT to use for the PSD and spectrogram plots can be set independently with --psd-size and --spec-size, respectively. The spectrogram plot does not display by default and is turned on with -S or --enable-spec." + + parser = OptionParser(conflict_handler="resolve", usage=usage, description=description) + parser.add_option("-d", "--data-type", type="string", default="complex64", + help="Specify the data type (complex64, float32, (u)int32, (u)int16, (u)int8) [default=%default]") + parser.add_option("-B", "--block", type="int", default=8192, + help="Specify the block size [default=%default]") + parser.add_option("-s", "--start", type="int", default=0, + help="Specify where to start in the file [default=%default]") + parser.add_option("-R", "--sample-rate", type="float", default=1.0, + help="Set the sampler rate of the data [default=%default]") + parser.add_option("", "--psd-size", type="int", default=1024, + help="Set the size of the PSD FFT [default=%default]") + parser.add_option("", "--spec-size", type="int", default=256, + help="Set the size of the spectrogram FFT [default=%default]") + parser.add_option("-S", "--enable-spec", action="store_true", default=False, + help="Turn on plotting the spectrogram [default=%default]") + + return parser + +def main(): + parser = setup_options() + (options, args) = parser.parse_args () + if len(args) != 1: + parser.print_help() + raise SystemExit, 1 + filename = args[0] + + dc = gr_plot_psd(options.data_type, filename, options) + +if __name__ == "__main__": + try: + main() + except KeyboardInterrupt: + pass + + + diff --git a/gr-utils/src/python/gr_plot_psd_c.py b/gr-utils/src/python/gr_plot_psd_c.py new file mode 100755 index 00000000..1edc04c2 --- /dev/null +++ b/gr-utils/src/python/gr_plot_psd_c.py @@ -0,0 +1,47 @@ +#!/usr/bin/env python +# +# Copyright 2008 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from optparse import OptionParser +import gr_plot_psd + +# This is a wrapper program for gr_plot_psd specifically for complex data + +def main(): + parser = gr_plot_psd.setup_options() + parser.remove_option("--data-type") + + (options, args) = parser.parse_args () + if len(args) != 1: + parser.print_help() + raise SystemExit, 1 + filename = args[0] + + dc = gr_plot_psd.gr_plot_psd("complex64", filename, options) + +if __name__ == "__main__": + try: + main() + except KeyboardInterrupt: + pass + + + diff --git a/gr-utils/src/python/gr_plot_psd_f.py b/gr-utils/src/python/gr_plot_psd_f.py new file mode 100755 index 00000000..bad6788c --- /dev/null +++ b/gr-utils/src/python/gr_plot_psd_f.py @@ -0,0 +1,47 @@ +#!/usr/bin/env python +# +# Copyright 2008 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +from optparse import OptionParser +import gr_plot_psd + +# This is a wrapper program for gr_plot_psd specifically for floating point data + +def main(): + parser = gr_plot_psd.setup_options() + parser.remove_option("--data-type") + + (options, args) = parser.parse_args () + if len(args) != 1: + parser.print_help() + raise SystemExit, 1 + filename = args[0] + + dc = gr_plot_psd.gr_plot_psd("float32", filename, options) + +if __name__ == "__main__": + try: + main() + except KeyboardInterrupt: + pass + + + -- 2.30.2