#!/usr/bin/env python
+import sys, os
+from optparse import OptionParser
+from gnuradio import gr, blks2, eng_notation
+
try:
import scipy
from scipy import fftpack
print "Please install SciPy to run this script (http://www.scipy.org/)"
raise SystemExit, 1
-import sys, os
-from PyQt4 import Qt, QtCore, QtGui
-import PyQt4.Qwt5 as Qwt
-from optparse import OptionParser
-from gnuradio import gr, blks2, eng_notation
-from scipy import fftpack
+try:
+ from PyQt4 import Qt, QtCore, QtGui
+except ImportError:
+ print "Please install PyQt4 to run this script (http://www.riverbankcomputing.co.uk/software/pyqt/download)"
+ raise SystemExit, 1
+
+try:
+ import PyQt4.Qwt5 as Qwt
+except ImportError:
+ print "Please install PyQwt5 to run this script (http://pyqwt.sourceforge.net/)"
+ raise SystemExit, 1
+
+try:
+ from pyqt_filter import Ui_MainWindow
+except ImportError:
+ print "Could not import from pyqt_filter. Please build with \"pyuic4 pyqt_filter.ui -o pyqt_filter.py\""
+ raise SystemExit, 1
-from pyqt_filter import Ui_MainWindow
-from pyqt_filter_firlpf import Ui_firlpfForm
-from pyqt_filter_firhpf import Ui_firhpfForm
class gr_plot_filter(QtGui.QMainWindow):
def __init__(self, qapp, options):
Qt.SIGNAL("currentChanged(int)"),
self.tab_changed)
- self.gui.designButton.setShortcut("Return")
+ self.connect(self.gui.nfftEdit,
+ Qt.SIGNAL("textEdited(QString)"),
+ self.nfft_edit_changed)
- self.taps = []
+ self.gui.designButton.setShortcut(QtCore.Qt.Key_Return)
- self.gui.lpfPassBandRippleLabel.setVisible(False)
- self.gui.lpfPassBandRippleEdit.setVisible(False)
- self.gui.bpfPassBandRippleLabel.setVisible(False)
- self.gui.bpfPassBandRippleEdit.setVisible(False)
- self.gui.hpfPassBandRippleLabel.setVisible(False)
- self.gui.hpfPassBandRippleEdit.setVisible(False)
+ self.taps = []
+ self.fftdB = []
+ self.fftDeg = []
+ self.groupDelay = []
+ self.nfftpts = int(10000)
+ self.gui.nfftEdit.setText(Qt.QString("%1").arg(self.nfftpts))
+
+ self.firFilters = ("Low Pass", "Band Pass", "Complex Band Pass", "Band Notch",
+ "High Pass", "Root Raised Cosine", "Gaussian")
+ self.optFilters = ("Low Pass", "Band Pass", "Complex Band Pass",
+ "Band Notch", "High Pass")
+
+ self.set_windowed()
# Initialize to LPF
self.gui.filterTypeWidget.setCurrentWidget(self.gui.firlpfPage)
+ # Set Axis labels
+ self.gui.freqPlot.setAxisTitle(self.gui.freqPlot.xBottom,
+ "Frequency (Hz)")
+ self.gui.freqPlot.setAxisTitle(self.gui.freqPlot.yLeft,
+ "Magnitude (dB)")
+ self.gui.timePlot.setAxisTitle(self.gui.timePlot.xBottom,
+ "Tap number")
+ self.gui.timePlot.setAxisTitle(self.gui.timePlot.yLeft,
+ "Amplitude")
+ self.gui.phasePlot.setAxisTitle(self.gui.phasePlot.xBottom,
+ "Frequency (Hz)")
+ self.gui.phasePlot.setAxisTitle(self.gui.phasePlot.yLeft,
+ "Phase (Radians)")
+ self.gui.groupPlot.setAxisTitle(self.gui.groupPlot.xBottom,
+ "Frequency (Hz)")
+ self.gui.groupPlot.setAxisTitle(self.gui.groupPlot.yLeft,
+ "Delay (sec)")
+
# Set up plot curves
self.rcurve = Qwt.QwtPlotCurve("Real")
self.rcurve.attach(self.gui.timePlot)
+ self.icurve = Qwt.QwtPlotCurve("Imag")
+ self.icurve.attach(self.gui.timePlot)
self.freqcurve = Qwt.QwtPlotCurve("PSD")
self.freqcurve.attach(self.gui.freqPlot)
+ self.phasecurve = Qwt.QwtPlotCurve("Phase")
+ self.phasecurve.attach(self.gui.phasePlot)
+
+ self.groupcurve = Qwt.QwtPlotCurve("Group Delay")
+ self.groupcurve.attach(self.gui.groupPlot)
+
# Create zoom functionality for the plots
self.timeZoomer = Qwt.QwtPlotZoomer(self.gui.timePlot.xBottom,
self.gui.timePlot.yLeft,
Qwt.QwtPicker.AlwaysOn,
self.gui.freqPlot.canvas())
+ self.phaseZoomer = Qwt.QwtPlotZoomer(self.gui.phasePlot.xBottom,
+ self.gui.phasePlot.yLeft,
+ Qwt.QwtPicker.PointSelection,
+ Qwt.QwtPicker.AlwaysOn,
+ self.gui.phasePlot.canvas())
+
+ self.groupZoomer = Qwt.QwtPlotZoomer(self.gui.groupPlot.xBottom,
+ self.gui.groupPlot.yLeft,
+ Qwt.QwtPicker.PointSelection,
+ Qwt.QwtPicker.AlwaysOn,
+ self.gui.groupPlot.canvas())
+
# Set up pen for colors and line width
blue = QtGui.qRgb(0x00, 0x00, 0xFF)
blueBrush = Qt.QBrush(Qt.QColor(blue))
+ red = QtGui.qRgb(0xFF, 0x00, 0x00)
+ redBrush = Qt.QBrush(Qt.QColor(red))
self.freqcurve.setPen(Qt.QPen(blueBrush, 2))
self.rcurve.setPen(Qt.QPen(blueBrush, 2))
+ self.icurve.setPen(Qt.QPen(redBrush, 2))
+ self.phasecurve.setPen(Qt.QPen(blueBrush, 2))
+ self.groupcurve.setPen(Qt.QPen(blueBrush, 2))
+
+ # Set up validators for edit boxes
+ self.intVal = Qt.QIntValidator(None)
+ self.dblVal = Qt.QDoubleValidator(None)
+ self.gui.nfftEdit.setValidator(self.intVal)
+ self.gui.sampleRateEdit.setValidator(self.dblVal)
+ self.gui.filterGainEdit.setValidator(self.dblVal)
+ self.gui.endofLpfPassBandEdit.setValidator(self.dblVal)
+ self.gui.startofLpfStopBandEdit.setValidator(self.dblVal)
+ self.gui.lpfStopBandAttenEdit.setValidator(self.dblVal)
+ self.gui.lpfPassBandRippleEdit.setValidator(self.dblVal)
+ self.gui.startofBpfPassBandEdit.setValidator(self.dblVal)
+ self.gui.endofBpfPassBandEdit.setValidator(self.dblVal)
+ self.gui.bpfTransitionEdit.setValidator(self.dblVal)
+ self.gui.bpfStopBandAttenEdit.setValidator(self.dblVal)
+ self.gui.bpfPassBandRippleEdit.setValidator(self.dblVal)
+ self.gui.startofBnfStopBandEdit.setValidator(self.dblVal)
+ self.gui.endofBnfStopBandEdit.setValidator(self.dblVal)
+ self.gui.bnfTransitionEdit.setValidator(self.dblVal)
+ self.gui.bnfStopBandAttenEdit.setValidator(self.dblVal)
+ self.gui.bnfPassBandRippleEdit.setValidator(self.dblVal)
+ self.gui.endofHpfStopBandEdit.setValidator(self.dblVal)
+ self.gui.startofHpfPassBandEdit.setValidator(self.dblVal)
+ self.gui.hpfStopBandAttenEdit.setValidator(self.dblVal)
+ self.gui.hpfPassBandRippleEdit.setValidator(self.dblVal)
+ self.gui.rrcSymbolRateEdit.setValidator(self.dblVal)
+ self.gui.rrcAlphaEdit.setValidator(self.dblVal)
+ self.gui.rrcNumTapsEdit.setValidator(self.dblVal)
+ self.gui.gausSymbolRateEdit.setValidator(self.dblVal)
+ self.gui.gausBTEdit.setValidator(self.dblVal)
+ self.gui.gausNumTapsEdit.setValidator(self.dblVal)
+
+ self.gui.nTapsEdit.setText("0")
self.filterWindows = {"Hamming Window" : gr.firdes.WIN_HAMMING,
"Hann Window" : gr.firdes.WIN_HANN,
self.gui.filterTypeWidget.setCurrentWidget(self.gui.firlpfPage)
elif(ftype == "Band Pass"):
self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbpfPage)
+ elif(ftype == "Complex Band Pass"):
+ self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbpfPage)
+ elif(ftype == "Band Notch"):
+ self.gui.filterTypeWidget.setCurrentWidget(self.gui.firbnfPage)
elif(ftype == "High Pass"):
self.gui.filterTypeWidget.setCurrentWidget(self.gui.firhpfPage)
+ elif(ftype == "Root Raised Cosine"):
+ self.gui.filterTypeWidget.setCurrentWidget(self.gui.rrcPage)
+ elif(ftype == "Gaussian"):
+ self.gui.filterTypeWidget.setCurrentWidget(self.gui.gausPage)
self.design()
self.design()
def set_equiripple(self):
+ # Stop sending the signal for this function
+ self.gui.filterTypeComboBox.blockSignals(True)
+
self.equiripple = True
self.gui.lpfPassBandRippleLabel.setVisible(True)
self.gui.lpfPassBandRippleEdit.setVisible(True)
self.gui.bpfPassBandRippleLabel.setVisible(True)
self.gui.bpfPassBandRippleEdit.setVisible(True)
+ self.gui.bnfPassBandRippleLabel.setVisible(True)
+ self.gui.bnfPassBandRippleEdit.setVisible(True)
self.gui.hpfPassBandRippleLabel.setVisible(True)
self.gui.hpfPassBandRippleEdit.setVisible(True)
+
+ # Save current type and repopulate the combo box for
+ # filters this window type can handle
+ currenttype = self.gui.filterTypeComboBox.currentText()
+ items = self.gui.filterTypeComboBox.count()
+ for i in xrange(items):
+ self.gui.filterTypeComboBox.removeItem(0)
+ self.gui.filterTypeComboBox.addItems(self.optFilters)
+
+ # If the last filter type was valid for this window type,
+ # go back to it; otherwise, reset
+ try:
+ index = self.optFilters.index(currenttype)
+ self.gui.filterTypeComboBox.setCurrentIndex(index)
+ except ValueError:
+ pass
+
+ # Tell gui its ok to start sending this signal again
+ self.gui.filterTypeComboBox.blockSignals(False)
def set_windowed(self):
+ # Stop sending the signal for this function
+ self.gui.filterTypeComboBox.blockSignals(True)
+
self.equiripple = False
self.gui.lpfPassBandRippleLabel.setVisible(False)
self.gui.lpfPassBandRippleEdit.setVisible(False)
self.gui.bpfPassBandRippleLabel.setVisible(False)
self.gui.bpfPassBandRippleEdit.setVisible(False)
+ self.gui.bnfPassBandRippleLabel.setVisible(False)
+ self.gui.bnfPassBandRippleEdit.setVisible(False)
self.gui.hpfPassBandRippleLabel.setVisible(False)
self.gui.hpfPassBandRippleEdit.setVisible(False)
-
+
+ # Save current type and repopulate the combo box for
+ # filters this window type can handle
+ currenttype = self.gui.filterTypeComboBox.currentText()
+ items = self.gui.filterTypeComboBox.count()
+ for i in xrange(items):
+ self.gui.filterTypeComboBox.removeItem(0)
+ self.gui.filterTypeComboBox.addItems(self.firFilters)
+
+ # If the last filter type was valid for this window type,
+ # go back to it; otherwise, reset
+ try:
+ index = self.optFilters.index(currenttype)
+ self.gui.filterTypeComboBox.setCurrentIndex(index)
+ except ValueError:
+ pass
+
+ # Tell gui its ok to start sending this signal again
+ self.gui.filterTypeComboBox.blockSignals(False)
+
def design(self):
ret = True
fs,r = self.gui.sampleRateEdit.text().toDouble()
if(winstr == "Equiripple"):
designer = {"Low Pass" : self.design_opt_lpf,
"Band Pass" : self.design_opt_bpf,
- "High Pass" : self.design_opt_hpf}
+ "Complex Band Pass" : self.design_opt_cbpf,
+ "Band Notch" : self.design_opt_bnf,
+ "High Pass" : self.design_opt_hpf}
taps,r = designer[ftype](fs, gain)
else:
designer = {"Low Pass" : self.design_win_lpf,
"Band Pass" : self.design_win_bpf,
- "High Pass" : self.design_win_hpf}
+ "Complex Band Pass" : self.design_win_cbpf,
+ "Band Notch" : self.design_win_bnf,
+ "High Pass" : self.design_win_hpf,
+ "Root Raised Cosine" : self.design_win_rrc,
+ "Gaussian" : self.design_win_gaus}
wintype = self.filterWindows[winstr]
taps,r = designer[ftype](fs, gain, wintype)
if(r):
- self.update_time_curves(taps)
- self.update_freq_curves(taps)
-
+ self.taps = scipy.array(taps)
+ self.get_fft(fs, self.taps, self.nfftpts)
+ self.update_time_curves()
+ self.update_freq_curves()
+ self.update_phase_curves()
+ self.update_group_curves()
+
+ self.gui.nTapsEdit.setText(Qt.QString("%1").arg(self.taps.size))
+
# Filter design functions using a window
def design_win_lpf(self, fs, gain, wintype):
else:
return ([],r)
+ def design_win_cbpf(self, fs, gain, wintype):
+ ret = True
+ pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
+ ret = r and ret
+ pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
+ ret = r and ret
+ tb,r = self.gui.bpfTransitionEdit.text().toDouble()
+ ret = r and ret
+ atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
+ ret = r and ret
+
+ if(r):
+ taps = gr.firdes.complex_band_pass_2(gain, fs, pb1, pb2, tb,
+ atten, wintype)
+ return (taps,r)
+ else:
+ return ([],r)
+
+ def design_win_bnf(self, fs, gain, wintype):
+ ret = True
+ pb1,r = self.gui.startofBnfStopBandEdit.text().toDouble()
+ ret = r and ret
+ pb2,r = self.gui.endofBnfStopBandEdit.text().toDouble()
+ ret = r and ret
+ tb,r = self.gui.bnfTransitionEdit.text().toDouble()
+ ret = r and ret
+ atten,r = self.gui.bnfStopBandAttenEdit.text().toDouble()
+ ret = r and ret
+
+ if(r):
+ taps = gr.firdes.band_reject_2(gain, fs, pb1, pb2, tb,
+ atten, wintype)
+ return (taps,r)
+ else:
+ return ([],r)
+
def design_win_hpf(self, fs, gain, wintype):
ret = True
sb,r = self.gui.endofHpfStopBandEdit.text().toDouble()
else:
return ([],r)
+ def design_win_rrc(self, fs, gain, wintype):
+ ret = True
+ sr,r = self.gui.rrcSymbolRateEdit.text().toDouble()
+ ret = r and ret
+ alpha,r = self.gui.rrcAlphaEdit.text().toDouble()
+ ret = r and ret
+ ntaps,r = self.gui.rrcNumTapsEdit.text().toInt()
+ ret = r and ret
+
+ if(r):
+ taps = gr.firdes.root_raised_cosine(gain, fs, sr,
+ alpha, ntaps)
+ return (taps,r)
+ else:
+ return ([],r)
+
+ def design_win_gaus(self, fs, gain, wintype):
+ ret = True
+ sr,r = self.gui.gausSymbolRateEdit.text().toDouble()
+ ret = r and ret
+ bt,r = self.gui.gausBTEdit.text().toDouble()
+ ret = r and ret
+ ntaps,r = self.gui.gausNumTapsEdit.text().toInt()
+ ret = r and ret
+ if(r):
+ spb = fs / sr
+ taps = gr.firdes.gaussian(gain, spb, bt, ntaps)
+ return (taps,r)
+ else:
+ return ([],r)
# Design Functions for Equiripple Filters
- def design_opt_lpf(self, fs, gain, wintype=None):
+ def design_opt_lpf(self, fs, gain):
ret = True
pb,r = self.gui.endofLpfPassBandEdit.text().toDouble()
ret = r and ret
else:
return ([], ret)
- def design_opt_bpf(self, fs, gain, wintype=None):
+ def design_opt_bpf(self, fs, gain):
ret = True
pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
ret = r and ret
else:
return ([],r)
- def design_opt_hpf(self, fs, gain, wintype=None):
+ def design_opt_cbpf(self, fs, gain):
+ ret = True
+ pb1,r = self.gui.startofBpfPassBandEdit.text().toDouble()
+ ret = r and ret
+ pb2,r = self.gui.endofBpfPassBandEdit.text().toDouble()
+ ret = r and ret
+ tb,r = self.gui.bpfTransitionEdit.text().toDouble()
+ ret = r and ret
+ atten,r = self.gui.bpfStopBandAttenEdit.text().toDouble()
+ ret = r and ret
+ ripple,r = self.gui.bpfPassBandRippleEdit.text().toDouble()
+ ret = r and ret
+
+ if(r):
+ sb1 = pb1 - tb
+ sb2 = pb2 + tb
+ taps = blks2.optfir.complex_band_pass(gain, fs, sb1, pb1, pb2, sb2,
+ ripple, atten)
+ return (taps,r)
+ else:
+ return ([],r)
+
+ def design_opt_bnf(self, fs, gain):
+ ret = True
+ sb1,r = self.gui.startofBnfStopBandEdit.text().toDouble()
+ ret = r and ret
+ sb2,r = self.gui.endofBnfStopBandEdit.text().toDouble()
+ ret = r and ret
+ tb,r = self.gui.bnfTransitionEdit.text().toDouble()
+ ret = r and ret
+ atten,r = self.gui.bnfStopBandAttenEdit.text().toDouble()
+ ret = r and ret
+ ripple,r = self.gui.bnfPassBandRippleEdit.text().toDouble()
+ ret = r and ret
+
+ if(r):
+ pb1 = sb1 - tb
+ pb2 = sb2 + tb
+ taps = blks2.optfir.band_reject(gain, fs, pb1, sb1, sb2, pb2,
+ ripple, atten)
+ return (taps,r)
+ else:
+ return ([],r)
+
+ def design_opt_hpf(self, fs, gain):
ret = True
sb,r = self.gui.endofHpfStopBandEdit.text().toDouble()
ret = r and ret
else:
return ([],r)
+ def nfft_edit_changed(self, nfft):
+ infft,r = nfft.toInt()
+ if(r and (infft != self.nfftpts)):
+ self.nfftpts = infft
+ self.update_freq_curves()
+
def tab_changed(self, tab):
if(tab == 0):
- self.update_freq_curves(self.taps)
+ self.update_freq_curves()
if(tab == 1):
- self.update_time_curves(self.taps)
+ self.update_time_curves()
+ if(tab == 2):
+ self.update_phase_curves()
+ if(tab == 3):
+ self.update_group_curves()
+
+ def get_fft(self, fs, taps, Npts):
+ Ts = 1.0/fs
+ fftpts = fftpack.fft(taps, Npts)
+ self.freq = scipy.arange(0, fs, 1.0/(Npts*Ts))
+ self.fftdB = 20.0*scipy.log10(abs(fftpts))
+ self.fftDeg = scipy.unwrap(scipy.angle(fftpts))
+ self.groupDelay = -scipy.diff(self.fftDeg)
- def update_time_curves(self, taps):
- self.taps = taps
- ntaps = len(taps)
+ def update_time_curves(self):
+ ntaps = len(self.taps)
if(ntaps > 0):
- self.rcurve.setData(scipy.arange(ntaps), taps)
-
+ if(type(self.taps[0]) == scipy.complex128):
+ self.rcurve.setData(scipy.arange(ntaps), self.taps.real)
+ self.icurve.setData(scipy.arange(ntaps), self.taps.imag)
+ else:
+ self.rcurve.setData(scipy.arange(ntaps), self.taps)
+
# Reset the x-axis to the new time scale
- ymax = 1.5 * max(taps)
- ymin = 1.5 * min(taps)
+ ymax = 1.5 * max(self.taps)
+ ymin = 1.5 * min(self.taps)
self.gui.timePlot.setAxisScale(self.gui.timePlot.xBottom,
0, ntaps)
self.gui.timePlot.setAxisScale(self.gui.timePlot.yLeft,
self.gui.timePlot.replot()
- def update_freq_curves(self, taps, Npts=1000):
- if(len(taps) > 0):
- fftpts = fftpack.fft(taps, Npts)
- freq = scipy.arange(0, Npts)
-
- fftdB = 20.0*scipy.log10(abs(fftpts))
-
- self.freqcurve.setData(freq, fftdB)
+ def update_freq_curves(self):
+ npts = len(self.fftdB)
+ if(npts > 0):
+ self.freqcurve.setData(self.freq, self.fftdB)
# Reset the x-axis to the new time scale
- ymax = 1.5 * max(fftdB)
- ymin = 1.5 * min(fftdB)
+ ymax = 1.5 * max(self.fftdB[0:npts/2])
+ ymin = 1.1 * min(self.fftdB[0:npts/2])
+ xmax = self.freq[npts/2]
+ xmin = self.freq[0]
self.gui.freqPlot.setAxisScale(self.gui.freqPlot.xBottom,
- 0, Npts/2)
- self.gui.timePlot.setAxisScale(self.gui.timePlot.yLeft,
+ xmin, xmax)
+ self.gui.freqPlot.setAxisScale(self.gui.freqPlot.yLeft,
ymin, ymax)
# Set the zoomer base to unzoom to the new axis
self.gui.freqPlot.replot()
+ def update_phase_curves(self):
+ npts = len(self.fftDeg)
+ if(npts > 0):
+ self.phasecurve.setData(self.freq, self.fftDeg)
+
+ # Reset the x-axis to the new time scale
+ ymax = 1.5 * max(self.fftDeg[0:npts/2])
+ ymin = 1.1 * min(self.fftDeg[0:npts/2])
+ xmax = self.freq[npts/2]
+ xmin = self.freq[0]
+ self.gui.phasePlot.setAxisScale(self.gui.phasePlot.xBottom,
+ xmin, xmax)
+ self.gui.phasePlot.setAxisScale(self.gui.phasePlot.yLeft,
+ ymin, ymax)
+
+ # Set the zoomer base to unzoom to the new axis
+ self.phaseZoomer.setZoomBase()
+
+ self.gui.phasePlot.replot()
+
+ def update_group_curves(self):
+ npts = len(self.groupDelay)
+ if(npts > 0):
+ self.groupcurve.setData(self.freq, self.groupDelay)
+
+ # Reset the x-axis to the new time scale
+ ymax = 1.5 * max(self.groupDelay[0:npts/2])
+ ymin = 1.1 * min(self.groupDelay[0:npts/2])
+ xmax = self.freq[npts/2]
+ xmin = self.freq[0]
+ self.gui.groupPlot.setAxisScale(self.gui.groupPlot.xBottom,
+ xmin, xmax)
+ self.gui.groupPlot.setAxisScale(self.gui.groupPlot.yLeft,
+ ymin, ymax)
+
+ # Set the zoomer base to unzoom to the new axis
+ self.groupZoomer.setZoomBase()
+
+ self.gui.groupPlot.replot()
+
+
def setup_options():
usage="%prog: [options] (input_filename)"
description = ""
projects / debian / gnuradio / blobdiff