--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2010 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 gnuradio import gr, gru, modulation_utils2
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+import random, time, struct, sys, os, math
+
+from threading import Thread
+
+# from current dir
+from transmit_path import transmit_path
+from receive_path import receive_path
+
+try:
+ from gnuradio.qtgui import qtgui
+ from PyQt4 import QtGui, QtCore
+ import sip
+except ImportError:
+ print "Please install gr-qtgui."
+ sys.exit(1)
+
+try:
+ from qt_digital_window2 import Ui_DigitalWindow
+except ImportError:
+ print "Error: could not find qt_digital_window2.py:"
+ print "\t\"pyuic4 qt_digital_window2.ui -o qt_digital_window2.py\""
+ sys.exit(1)
+
+
+#print os.getpid()
+#raw_input()
+
+
+# ////////////////////////////////////////////////////////////////////
+# Define the QT Interface and Control Dialog
+# ////////////////////////////////////////////////////////////////////
+
+
+class dialog_box(QtGui.QMainWindow):
+ def __init__(self, snkTx, snkRx, fg, parent=None):
+
+ QtGui.QWidget.__init__(self, parent)
+ self.gui = Ui_DigitalWindow()
+ self.gui.setupUi(self)
+
+ self.fg = fg
+
+ self.set_sample_rate(self.fg.sample_rate())
+
+ self.set_snr(self.fg.snr())
+ self.set_frequency(self.fg.frequency_offset())
+ self.set_time_offset(self.fg.timing_offset())
+
+ self.set_gain_clock(self.fg.rx_gain_clock())
+ self.set_gain_phase(self.fg.rx_gain_phase())
+ self.set_gain_freq(self.fg.rx_gain_freq())
+
+ # Add the qtsnk widgets to the hlayout box
+ self.gui.sinkLayout.addWidget(snkTx)
+ self.gui.sinkLayout.addWidget(snkRx)
+
+
+ # Connect up some signals
+ self.connect(self.gui.pauseButton, QtCore.SIGNAL("clicked()"),
+ self.pauseFg)
+
+ self.connect(self.gui.sampleRateEdit, QtCore.SIGNAL("editingFinished()"),
+ self.sampleRateEditText)
+
+ self.connect(self.gui.snrEdit, QtCore.SIGNAL("editingFinished()"),
+ self.snrEditText)
+ self.connect(self.gui.freqEdit, QtCore.SIGNAL("editingFinished()"),
+ self.freqEditText)
+ self.connect(self.gui.timeEdit, QtCore.SIGNAL("editingFinished()"),
+ self.timeEditText)
+
+ self.connect(self.gui.gainClockEdit, QtCore.SIGNAL("editingFinished()"),
+ self.gainClockEditText)
+ self.connect(self.gui.gainPhaseEdit, QtCore.SIGNAL("editingFinished()"),
+ self.gainPhaseEditText)
+ self.connect(self.gui.gainFreqEdit, QtCore.SIGNAL("editingFinished()"),
+ self.gainFreqEditText)
+
+ # Build a timer to update the packet number and PER fields
+ self.update_delay = 250 # time between updating packet rate fields
+ self.pkt_timer = QtCore.QTimer(self)
+ self.connect(self.pkt_timer, QtCore.SIGNAL("timeout()"),
+ self.updatePacketInfo)
+ self.pkt_timer.start(self.update_delay)
+
+ def pauseFg(self):
+ if(self.gui.pauseButton.text() == "Pause"):
+ self.fg.stop()
+ self.fg.wait()
+ self.gui.pauseButton.setText("Unpause")
+ else:
+ self.fg.start()
+ self.gui.pauseButton.setText("Pause")
+
+ # Accessor functions for Gui to manipulate system parameters
+ def set_sample_rate(self, sr):
+ ssr = eng_notation.num_to_str(sr)
+ self.gui.sampleRateEdit.setText(QtCore.QString("%1").arg(ssr))
+
+ def sampleRateEditText(self):
+ try:
+ rate = self.gui.sampleRateEdit.text().toAscii()
+ srate = eng_notation.str_to_num(rate)
+ #self.fg.set_sample_rate(srate)
+ except RuntimeError:
+ pass
+
+
+ # Accessor functions for Gui to manipulate channel model
+ def set_snr(self, snr):
+ self.gui.snrEdit.setText(QtCore.QString("%1").arg(snr))
+
+ def set_frequency(self, fo):
+ self.gui.freqEdit.setText(QtCore.QString("%1").arg(fo))
+
+ def set_time_offset(self, to):
+ self.gui.timeEdit.setText(QtCore.QString("%1").arg(to))
+
+ def snrEditText(self):
+ try:
+ snr = self.gui.snrEdit.text().toDouble()[0]
+ self.fg.set_snr(snr)
+ except RuntimeError:
+ pass
+
+ def freqEditText(self):
+ try:
+ freq = self.gui.freqEdit.text().toDouble()[0]
+ self.fg.set_frequency_offset(freq)
+ except RuntimeError:
+ pass
+
+ def timeEditText(self):
+ try:
+ to = self.gui.timeEdit.text().toDouble()[0]
+ self.fg.set_timing_offset(to)
+ except RuntimeError:
+ pass
+
+
+ # Accessor functions for Gui to manipulate receiver parameters
+ def set_gain_clock(self, gain):
+ self.gui.gainClockEdit.setText(QtCore.QString("%1").arg(gain))
+
+ def set_gain_phase(self, gain_phase):
+ self.gui.gainPhaseEdit.setText(QtCore.QString("%1").arg(gain_phase))
+
+ def set_gain_freq(self, gain_freq):
+ self.gui.gainFreqEdit.setText(QtCore.QString("%1").arg(gain_freq))
+
+
+ def set_alpha_time(self, alpha):
+ self.gui.alphaTimeEdit.setText(QtCore.QString("%1").arg(alpha))
+
+ def set_beta_time(self, beta):
+ self.gui.betaTimeEdit.setText(QtCore.QString("%1").arg(beta))
+
+ def set_alpha_phase(self, alpha):
+ self.gui.alphaPhaseEdit.setText(QtCore.QString("%1").arg(alpha))
+
+ def gainPhaseEditText(self):
+ try:
+ gain_phase = self.gui.gainPhaseEdit.text().toDouble()[0]
+ self.fg.set_rx_gain_phase(gain_phase)
+ except RuntimeError:
+ pass
+
+ def gainClockEditText(self):
+ try:
+ gain = self.gui.gainClockEdit.text().toDouble()[0]
+ self.fg.set_rx_gain_clock(gain)
+ except RuntimeError:
+ pass
+
+ def gainFreqEditText(self):
+ try:
+ gain = self.gui.gainFreqEdit.text().toDouble()[0]
+ self.fg.set_rx_gain_freq(gain)
+ except RuntimeError:
+ pass
+
+ # Accessor functions for packet error reporting
+ def updatePacketInfo(self):
+ # Pull these globals in from the main thread
+ global n_rcvd, n_right, pktno
+
+ if(pktno > 0):
+ per = float(n_rcvd - n_right)/float(pktno)
+ else:
+ per = 0
+ self.gui.pktsRcvdEdit.setText(QtCore.QString("%1").arg(n_rcvd))
+ self.gui.pktsCorrectEdit.setText(QtCore.QString("%1").arg(n_right))
+ self.gui.perEdit.setText(QtCore.QString("%1").arg(float(per), 0, 'e', 4))
+
+
+
+# ////////////////////////////////////////////////////////////////////
+# Define the GNU Radio Top Block
+# ////////////////////////////////////////////////////////////////////
+
+
+
+class my_top_block(gr.top_block):
+ def __init__(self, mod_class, demod_class, rx_callback, options):
+ gr.top_block.__init__(self)
+
+ self._sample_rate = options.sample_rate
+
+ channelon = True;
+
+ self.gui_on = options.gui
+
+ self._frequency_offset = options.frequency_offset
+ self._timing_offset = options.timing_offset
+ self._tx_amplitude = options.tx_amplitude
+ self._snr_dB = options.snr
+
+ self._noise_voltage = self.get_noise_voltage(self._snr_dB)
+
+ # With new interface, sps does not get set by default, but
+ # in the loopback, we don't recalculate it; so just force it here
+ if(options.samples_per_symbol == None):
+ options.samples_per_symbol = 2
+
+ self.txpath = transmit_path(mod_class, options)
+ self.throttle = gr.throttle(gr.sizeof_gr_complex, self.sample_rate())
+ self.rxpath = receive_path(demod_class, rx_callback, options)
+
+ # FIXME: do better exposure to lower issues for control
+ self._gain_clock = self.rxpath.packet_receiver._demodulator._timing_alpha
+ self._gain_phase = self.rxpath.packet_receiver._demodulator._phase_alpha
+ self._gain_freq = self.rxpath.packet_receiver._demodulator._freq_alpha
+
+ if channelon:
+ self.channel = gr.channel_model(self._noise_voltage,
+ self.frequency_offset(),
+ self.timing_offset())
+
+ if options.discontinuous:
+ z = 20000*[0,]
+ self.zeros = gr.vector_source_c(z, True)
+ packet_size = 5*((4+8+4+1500+4) * 8)
+ self.mux = gr.stream_mux(gr.sizeof_gr_complex, [packet_size-0, int(9e5)])
+
+ # Connect components
+ self.connect(self.txpath, self.throttle, (self.mux,0))
+ self.connect(self.zeros, (self.mux,1))
+ self.connect(self.mux, self.channel, self.rxpath)
+
+ else:
+ self.connect(self.txpath, self.throttle, self.channel, self.rxpath)
+
+ if self.gui_on:
+ self.qapp = QtGui.QApplication(sys.argv)
+ fftsize = 2048
+
+ self.snk_tx = qtgui.sink_c(fftsize, gr.firdes.WIN_BLACKMAN_hARRIS,
+ 0, 1,
+ "Tx", True, True, False, True, True)
+ self.snk_rx = qtgui.sink_c(fftsize, gr.firdes.WIN_BLACKMAN_hARRIS,
+ 0, 1,
+ "Rx", True, True, False, True, True)
+
+ self.snk_tx.set_frequency_axis(-80, 0)
+ self.snk_rx.set_frequency_axis(-60, 20)
+
+ self.freq_recov = self.rxpath.packet_receiver._demodulator.freq_recov
+ self.phase_recov = self.rxpath.packet_receiver._demodulator.phase_recov
+ self.time_recov = self.rxpath.packet_receiver._demodulator.time_recov
+ self.freq_recov.set_alpha(self._gain_freq)
+ self.freq_recov.set_beta(self._gain_freq/10.0)
+ self.phase_recov.set_alpha(self._gain_phase)
+ self.phase_recov.set_beta(0.25*self._gain_phase*self._gain_phase)
+ self.time_recov.set_alpha(self._gain_clock)
+ self.time_recov.set_beta(0.25*self._gain_clock*self._gain_clock)
+
+ # Connect to the QT sinks
+ # FIXME: make better exposure to receiver from rxpath
+ self.connect(self.channel, self.snk_tx)
+ self.connect(self.phase_recov, self.snk_rx)
+ #self.connect(self.freq_recov, self.snk_rx)
+
+ pyTxQt = self.snk_tx.pyqwidget()
+ pyTx = sip.wrapinstance(pyTxQt, QtGui.QWidget)
+
+ pyRxQt = self.snk_rx.pyqwidget()
+ pyRx = sip.wrapinstance(pyRxQt, QtGui.QWidget)
+
+ self.main_box = dialog_box(pyTx, pyRx, self)
+ self.main_box.show()
+
+ else:
+ # Connect components
+ self.connect(self.txpath, self.throttle, self.rxpath)
+
+
+
+ # System Parameters
+ def sample_rate(self):
+ return self._sample_rate
+
+ def set_sample_rate(self, sr):
+ self._sample_rate = sr
+ #self.throttle.set_samples_per_second(self._sample_rate)
+
+ # Channel Model Parameters
+ def snr(self):
+ return self._snr_dB
+
+ def set_snr(self, snr):
+ self._snr_dB = snr
+ self._noise_voltage = self.get_noise_voltage(self._snr_dB)
+ self.channel.set_noise_voltage(self._noise_voltage)
+
+ def get_noise_voltage(self, SNR):
+ snr = 10.0**(SNR/10.0)
+ power_in_signal = abs(self._tx_amplitude)**2
+ noise_power = power_in_signal/snr
+ noise_voltage = math.sqrt(noise_power)
+ return noise_voltage
+
+ def frequency_offset(self):
+ return self._frequency_offset * self.sample_rate()
+
+ def set_frequency_offset(self, fo):
+ self._frequency_offset = fo / self.sample_rate()
+ self.channel.set_frequency_offset(self._frequency_offset)
+
+ def timing_offset(self):
+ return self._timing_offset
+
+ def set_timing_offset(self, to):
+ self._timing_offset = to
+ self.channel.set_timing_offset(self._timing_offset)
+
+
+ # Receiver Parameters
+ def rx_gain_clock(self):
+ return self._gain_clock
+
+ def rx_gain_clock_beta(self):
+ return self._gain_clock_beta
+
+ def set_rx_gain_clock(self, gain):
+ self._gain_clock = gain
+ self._gain_clock_beta = .25 * self._gain_clock * self._gain_clock
+ self.rxpath.packet_receiver._demodulator.time_recov.set_alpha(self._gain_clock)
+ self.rxpath.packet_receiver._demodulator.time_recov.set_beta(self._gain_clock_beta)
+
+ def rx_gain_phase(self):
+ return self._gain_phase
+
+ def rx_gain_phase_beta(self):
+ return self._gain_phase_beta
+
+ def set_rx_gain_phase(self, gain_phase):
+ self._gain_phase = gain_phase
+ self._gain_phase_beta = .25 * self._gain_phase * self._gain_phase
+ self.rxpath.packet_receiver._demodulator.phase_recov.set_alpha(self._gain_phase)
+ self.rxpath.packet_receiver._demodulator.phase_recov.set_beta(self._gain_phase_beta)
+
+
+ def rx_gain_freq(self):
+ return self._gain_freq
+
+ def set_rx_gain_freq(self, gain_freq):
+ self._gain_freq = gain_freq
+ #self._gain_freq_beta = .25 * self._gain_freq * self._gain_freq
+ self.rxpath.packet_receiver._demodulator.freq_recov.set_alpha(self._gain_freq)
+ self.rxpath.packet_receiver._demodulator.freq_recov.set_beta(self._gain_freq/10.0)
+ #self.rxpath.packet_receiver._demodulator.freq_recov.set_beta(self._gain_fre_beta)
+
+
+# /////////////////////////////////////////////////////////////////////////////
+# Thread to handle the packet sending procedure
+# Operates in parallel with qApp.exec_()
+# /////////////////////////////////////////////////////////////////////////////
+
+
+
+class th_send(Thread):
+ def __init__(self, send_fnc, megs, sz):
+ Thread.__init__(self)
+ self.send = send_fnc
+ self.nbytes = int(1e6 * megs)
+ self.pkt_size = int(sz)
+
+ def run(self):
+ # generate and send packets
+ n = 0
+ pktno = 0
+
+ while n < self.nbytes:
+ self.send(struct.pack('!H', pktno & 0xffff) +
+ (self.pkt_size - 2) * chr(pktno & 0xff))
+ n += self.pkt_size
+ pktno += 1
+
+ self.send(eof=True)
+
+ def stop(self):
+ self.nbytes = 0
+
+
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+
+
+def main():
+
+ global n_rcvd, n_right, pktno
+
+ n_rcvd = 0
+ n_right = 0
+ pktno = 0
+
+ def rx_callback(ok, payload):
+ global n_rcvd, n_right, pktno
+ (pktno,) = struct.unpack('!H', payload[0:2])
+ n_rcvd += 1
+ if ok:
+ n_right += 1
+
+ if not options.gui:
+ print "ok = %5s pktno = %4d n_rcvd = %4d n_right = %4d" % (
+ ok, pktno, n_rcvd, n_right)
+
+
+ def send_pkt(payload='', eof=False):
+ return tb.txpath.send_pkt(payload, eof)
+
+ mods = modulation_utils2.type_1_mods()
+ demods = modulation_utils2.type_1_demods()
+
+ parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+ expert_grp = parser.add_option_group("Expert")
+ channel_grp = parser.add_option_group("Channel")
+
+ parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(),
+ default='dbpsk2',
+ help="Select modulation from: %s [default=%%default]"
+ % (', '.join(mods.keys()),))
+
+ parser.add_option("-s", "--size", type="eng_float", default=1500,
+ help="set packet size [default=%default]")
+ parser.add_option("-M", "--megabytes", type="eng_float", default=1.0,
+ help="set megabytes to transmit [default=%default]")
+ parser.add_option("","--discontinuous", action="store_true", default=False,
+ help="enable discontinous transmission (bursts of 5 packets)")
+ parser.add_option("-G", "--gui", action="store_true", default=False,
+ help="Turn on the GUI [default=%default]")
+
+ channel_grp.add_option("", "--sample-rate", type="eng_float", default=1e5,
+ help="set speed of channel/simulation rate to RATE [default=%default]")
+ channel_grp.add_option("", "--snr", type="eng_float", default=30,
+ help="set the SNR of the channel in dB [default=%default]")
+ channel_grp.add_option("", "--frequency-offset", type="eng_float", default=0,
+ help="set frequency offset introduced by channel [default=%default]")
+ channel_grp.add_option("", "--timing-offset", type="eng_float", default=1.0,
+ help="set timing offset introduced by channel [default=%default]")
+ channel_grp.add_option("", "--seed", action="store_true", default=False,
+ help="use a random seed for AWGN noise [default=%default]")
+
+ transmit_path.add_options(parser, expert_grp)
+ receive_path.add_options(parser, expert_grp)
+
+ for mod in mods.values():
+ mod.add_options(expert_grp)
+ for demod in demods.values():
+ demod.add_options(expert_grp)
+
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: failed to enable realtime scheduling"
+
+ # Create an instance of a hierarchical block
+ tb = my_top_block(mods[options.modulation],
+ demods[options.modulation],
+ rx_callback, options)
+ tb.start()
+
+ packet_sender = th_send(send_pkt, options.megabytes, options.size)
+ packet_sender.start()
+
+ if(options.gui):
+ tb.qapp.exec_()
+ packet_sender.stop()
+ else:
+ # Process until done; hack in to the join to stop on an interrupt
+ while(packet_sender.isAlive()):
+ try:
+ packet_sender.join(1)
+ except KeyboardInterrupt:
+ packet_sender.stop()
+
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
projects / debian / gnuradio / blobdiff