diff options
Diffstat (limited to 'gr-utils/plot_tools/plot_psd_base.py')
| -rw-r--r-- | gr-utils/plot_tools/plot_psd_base.py | 137 |
1 files changed, 80 insertions, 57 deletions
diff --git a/gr-utils/plot_tools/plot_psd_base.py b/gr-utils/plot_tools/plot_psd_base.py index 3d78af0dd1..88f86f5725 100644 --- a/gr-utils/plot_tools/plot_psd_base.py +++ b/gr-utils/plot_tools/plot_psd_base.py @@ -35,7 +35,8 @@ class plot_psd_base(object): self.datatype = datatype if self.datatype is None: self.datatype = datatype_lookup[options.data_type] - self.sizeof_data = self.datatype().nbytes # number of bytes per sample in file + # number of bytes per sample in file + self.sizeof_data = self.datatype().nbytes self.axis_font_size = 16 self.label_font_size = 18 @@ -47,23 +48,27 @@ class plot_psd_base(object): 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 = 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.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_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_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_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.button_right_callback = self.button_right.on_clicked( + self.button_right_click) self.xlim = numpy.array(self.sp_iq.get_xlim()) @@ -76,7 +81,8 @@ class plot_psd_base(object): self.position = self.hfile.tell() / self.sizeof_data self.text_file_pos.set_text("File Position: %d" % self.position) try: - self.iq = numpy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length) + self.iq = numpy.fromfile( + self.hfile, dtype=self.datatype, count=self.block_length) except MemoryError: print("End of File") return False @@ -86,7 +92,8 @@ class plot_psd_base(object): if(len(self.iq) > 0): tstep = 1.0 / self.sample_rate #self.time = numpy.array([tstep*(self.position + i) for i in range(len(self.iq))]) - self.time = numpy.array([tstep*(i) for i in range(len(self.iq))]) + self.time = numpy.array([tstep * (i) + for i in range(len(self.iq))]) self.iq_psd, self.freq = self.dopsd(self.iq) return True @@ -98,48 +105,58 @@ class plot_psd_base(object): ''' Need to do this here and plot later so we can do the fftshift ''' overlap = self.psdfftsize / 4 winfunc = numpy.blackman - psd,freq = mlab.psd(iq, self.psdfftsize, self.sample_rate, - window = lambda d: d*winfunc(self.psdfftsize), - noverlap = overlap) - psd = 10.0*numpy.log10(abs(psd)) + psd, freq = mlab.psd(iq, self.psdfftsize, self.sample_rate, + window=lambda d: d * winfunc(self.psdfftsize), + noverlap=overlap) + psd = 10.0 * numpy.log10(abs(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) + 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") + 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.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") r = 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.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(self.time, self.iq) # draw the plot self.plot_psd = self.sp_psd.plot([], 'b') # make plot for PSD self.draw_psd(self.freq, self.iq_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.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(self.time, self.iq) @@ -151,12 +168,12 @@ class plot_psd_base(object): self.plot_iq[0].set_data([t, reals]) self.plot_iq[1].set_data([t, imags]) self.sp_iq.set_xlim(t.min(), t.max()) - self.sp_iq.set_ylim([1.5*min([reals.min(), imags.min()]), - 1.5*max([reals.max(), imags.max()])]) + self.sp_iq.set_ylim([1.5 * min([reals.min(), imags.min()]), + 1.5 * max([reals.max(), imags.max()])]) def draw_psd(self, f, p): self.plot_psd[0].set_data([f, p]) - self.sp_psd.set_ylim([p.min()-10, p.max()+10]) + self.sp_psd.set_ylim([p.min() - 10, p.max() + 10]) self.sp_psd.set_xlim([f.min(), f.max()]) def draw_spec(self, t, s): @@ -164,8 +181,8 @@ class plot_psd_base(object): winfunc = numpy.blackman self.sp_spec.clear() self.sp_spec.specgram(s, self.specfftsize, self.sample_rate, - window = lambda d: d*winfunc(self.specfftsize), - noverlap = overlap, xextent=[t.min(), t.max()]) + window=lambda d: d * winfunc(self.specfftsize), + noverlap=overlap, xextent=[t.min(), t.max()]) def update_plots(self): self.draw_time(self.time, self.iq) @@ -174,7 +191,8 @@ class plot_psd_base(object): if self.dospec: self.draw_spec(self.time, self.iq) - self.xlim = numpy.array(self.sp_iq.get_xlim()) # so zoom doesn't get called + # so zoom doesn't get called + self.xlim = numpy.array(self.sp_iq.get_xlim()) draw() @@ -184,11 +202,12 @@ class plot_psd_base(object): if(newxlim[0] != curxlim[0] or newxlim[1] != curxlim[1]): #xmin = max(0, int(ceil(self.sample_rate*(newxlim[0] - self.position)))) #xmax = min(int(ceil(self.sample_rate*(newxlim[1] - self.position))), len(self.iq)) - xmin = max(0, int(ceil(self.sample_rate*(newxlim[0])))) - xmax = min(int(ceil(self.sample_rate*(newxlim[1]))), len(self.iq)) + xmin = max(0, int(ceil(self.sample_rate * (newxlim[0])))) + xmax = min( + int(ceil(self.sample_rate * (newxlim[1]))), len(self.iq)) - iq = numpy.array(self.iq[xmin : xmax]) - time = numpy.array(self.time[xmin : xmax]) + iq = numpy.array(self.iq[xmin: xmax]) + time = numpy.array(self.time[xmin: xmax]) iq_psd, freq = self.dopsd(iq) @@ -220,10 +239,10 @@ class plot_psd_base(object): 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) + 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.hfile.seek(-self.hfile.tell(), 1) r = self.get_data() if(r): self.update_plots() @@ -232,40 +251,44 @@ class plot_psd_base(object): def setup_options(): 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 = ArgumentParser(conflict_handler="resolve", description=description) + parser = ArgumentParser( + conflict_handler="resolve", description=description) parser.add_argument("-d", "--data-type", default="complex64", - choices=("complex64", "float32", "int32", "uint32", "int16", - "uint16", "int8", "uint8" ), - help="Specify the data type [default=%(default)r]") + choices=("complex64", "float32", "int32", "uint32", "int16", + "uint16", "int8", "uint8"), + help="Specify the data type [default=%(default)r]") parser.add_argument("-B", "--block", type=int, default=8192, - help="Specify the block size [default=%(default)r]") + help="Specify the block size [default=%(default)r]") parser.add_argument("-s", "--start", type=int, default=0, - help="Specify where to start in the file [default=%(default)r]") + help="Specify where to start in the file [default=%(default)r]") parser.add_argument("-R", "--sample-rate", type=eng_float, default=1.0, - help="Set the sampler rate of the data [default=%(default)r]") + help="Set the sampler rate of the data [default=%(default)r]") parser.add_argument("--psd-size", type=int, default=1024, - help="Set the size of the PSD FFT [default=%(default)r]") + help="Set the size of the PSD FFT [default=%(default)r]") parser.add_argument("--spec-size", type=int, default=256, - help="Set the size of the spectrogram FFT [default=%(default)r]") + help="Set the size of the spectrogram FFT [default=%(default)r]") parser.add_argument("-S", "--enable-spec", action="store_true", - help="Turn on plotting the spectrogram [default=%(default)r]") + help="Turn on plotting the spectrogram [default=%(default)r]") parser.add_argument("file", metavar="FILE", - help="Input file with samples") + help="Input file with samples") return parser + def find(item_in, list_search): try: return list_search.index(item_in) != None except ValueError: return False + def main(): parser = plot_psd_base.setup_options() args = parser.parse_args() plot_psd_base(None, args.file, args) + if __name__ == "__main__": try: main() |