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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# SPDX-License-Identifier: GPL-3.0
#
# GNU Radio Python Flow Graph
# Title: Simulation of a fading channel
# Author: Naoki Pross
# GNU Radio version: 3.8.2.0
from distutils.version import StrictVersion
if __name__ == '__main__':
import ctypes
import sys
if sys.platform.startswith('linux'):
try:
x11 = ctypes.cdll.LoadLibrary('libX11.so')
x11.XInitThreads()
except:
print("Warning: failed to XInitThreads()")
from PyQt5 import Qt
from gnuradio import qtgui
from gnuradio.filter import firdes
import sip
from gnuradio import analog
from gnuradio import blocks
from gnuradio import fosphor
from gnuradio.fft import window
from gnuradio import gr
import sys
import signal
from argparse import ArgumentParser
from gnuradio.eng_arg import eng_float, intx
from gnuradio import eng_notation
from gnuradio import qtgui
class Simluation(gr.top_block, Qt.QWidget):
def __init__(self):
gr.top_block.__init__(self, "Simulation of a fading channel")
Qt.QWidget.__init__(self)
self.setWindowTitle("Simulation of a fading channel")
qtgui.util.check_set_qss()
try:
self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
except:
pass
self.top_scroll_layout = Qt.QVBoxLayout()
self.setLayout(self.top_scroll_layout)
self.top_scroll = Qt.QScrollArea()
self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
self.top_scroll_layout.addWidget(self.top_scroll)
self.top_scroll.setWidgetResizable(True)
self.top_widget = Qt.QWidget()
self.top_scroll.setWidget(self.top_widget)
self.top_layout = Qt.QVBoxLayout(self.top_widget)
self.top_grid_layout = Qt.QGridLayout()
self.top_layout.addLayout(self.top_grid_layout)
self.settings = Qt.QSettings("GNU Radio", "Simluation")
try:
if StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
self.restoreGeometry(self.settings.value("geometry").toByteArray())
else:
self.restoreGeometry(self.settings.value("geometry"))
except:
pass
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 128e3
self.modulation_factor = modulation_factor = .7
self.carrier_freq = carrier_freq = 5e3
##################################################
# Blocks
##################################################
self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
1024, #size
samp_rate, #samp_rate
"Demodulated AM signal", #name
2 #number of inputs
)
self.qtgui_time_sink_x_0.set_update_time(1e-1)
self.qtgui_time_sink_x_0.set_y_axis(-1, 1)
self.qtgui_time_sink_x_0.set_y_label('Amplitude', "")
self.qtgui_time_sink_x_0.enable_tags(True)
self.qtgui_time_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_NORM, qtgui.TRIG_SLOPE_POS, 0.0, 1e-3, 0, "")
self.qtgui_time_sink_x_0.enable_autoscale(True)
self.qtgui_time_sink_x_0.enable_grid(True)
self.qtgui_time_sink_x_0.enable_axis_labels(True)
self.qtgui_time_sink_x_0.enable_control_panel(False)
self.qtgui_time_sink_x_0.enable_stem_plot(False)
labels = ['Original', 'Demodulated', 'Signal 3', 'Signal 4', 'Signal 5',
'Signal 6', 'Signal 7', 'Signal 8', 'Signal 9', 'Signal 10']
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ['blue', 'red', 'green', 'black', 'cyan',
'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
styles = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
markers = [-1, -1, -1, -1, -1,
-1, -1, -1, -1, -1]
for i in range(2):
if len(labels[i]) == 0:
self.qtgui_time_sink_x_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_time_sink_x_0.set_line_label(i, labels[i])
self.qtgui_time_sink_x_0.set_line_width(i, widths[i])
self.qtgui_time_sink_x_0.set_line_color(i, colors[i])
self.qtgui_time_sink_x_0.set_line_style(i, styles[i])
self.qtgui_time_sink_x_0.set_line_marker(i, markers[i])
self.qtgui_time_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_time_sink_x_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0.pyqwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_win)
self.fosphor_glfw_sink_c_0 = fosphor.glfw_sink_c()
self.fosphor_glfw_sink_c_0.set_fft_window(firdes.WIN_BLACKMAN_hARRIS)
self.fosphor_glfw_sink_c_0.set_frequency_range(0, samp_rate)
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate * 2,True)
self.blocks_multiply_xx_1 = blocks.multiply_vcc(1)
self.blocks_multiply_xx_0 = blocks.multiply_vcc(1)
self.blocks_complex_to_real_0 = blocks.complex_to_real(1)
self.blocks_add_xx_0 = blocks.add_vcc(1)
self.analog_sig_source_x_1 = analog.sig_source_c(samp_rate, analog.GR_SQR_WAVE, 50, 1, 0, 0)
self.analog_sig_source_x_0 = analog.sig_source_c(samp_rate, analog.GR_COS_WAVE, carrier_freq, 1, 0, 0)
self.analog_const_source_x_1 = analog.sig_source_c(0, analog.GR_CONST_WAVE, 0, 0, modulation_factor)
self.analog_const_source_x_0 = analog.sig_source_c(0, analog.GR_CONST_WAVE, 0, 0, 1)
self.analog_am_demod_cf_0 = analog.am_demod_cf(
channel_rate=samp_rate,
audio_decim=1,
audio_pass=5000,
audio_stop=5500,
)
##################################################
# Connections
##################################################
self.connect((self.analog_am_demod_cf_0, 0), (self.qtgui_time_sink_x_0, 1))
self.connect((self.analog_const_source_x_0, 0), (self.blocks_add_xx_0, 1))
self.connect((self.analog_const_source_x_1, 0), (self.blocks_multiply_xx_1, 0))
self.connect((self.analog_sig_source_x_0, 0), (self.blocks_multiply_xx_0, 1))
self.connect((self.analog_sig_source_x_1, 0), (self.blocks_multiply_xx_1, 1))
self.connect((self.blocks_add_xx_0, 0), (self.blocks_complex_to_real_0, 0))
self.connect((self.blocks_add_xx_0, 0), (self.blocks_multiply_xx_0, 0))
self.connect((self.blocks_complex_to_real_0, 0), (self.qtgui_time_sink_x_0, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.blocks_throttle_0, 0))
self.connect((self.blocks_multiply_xx_1, 0), (self.blocks_add_xx_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.analog_am_demod_cf_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.fosphor_glfw_sink_c_0, 0))
def closeEvent(self, event):
self.settings = Qt.QSettings("GNU Radio", "Simluation")
self.settings.setValue("geometry", self.saveGeometry())
event.accept()
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.analog_sig_source_x_0.set_sampling_freq(self.samp_rate)
self.analog_sig_source_x_1.set_sampling_freq(self.samp_rate)
self.blocks_throttle_0.set_sample_rate(self.samp_rate * 2)
self.fosphor_glfw_sink_c_0.set_frequency_range(0, self.samp_rate)
self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate)
def get_modulation_factor(self):
return self.modulation_factor
def set_modulation_factor(self, modulation_factor):
self.modulation_factor = modulation_factor
self.analog_const_source_x_1.set_offset(self.modulation_factor)
def get_carrier_freq(self):
return self.carrier_freq
def set_carrier_freq(self, carrier_freq):
self.carrier_freq = carrier_freq
self.analog_sig_source_x_0.set_frequency(self.carrier_freq)
def main(top_block_cls=Simluation, options=None):
if gr.enable_realtime_scheduling() != gr.RT_OK:
print("Error: failed to enable real-time scheduling.")
if StrictVersion("4.5.0") <= StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"):
style = gr.prefs().get_string('qtgui', 'style', 'raster')
Qt.QApplication.setGraphicsSystem(style)
qapp = Qt.QApplication(sys.argv)
tb = top_block_cls()
tb.start()
tb.show()
def sig_handler(sig=None, frame=None):
Qt.QApplication.quit()
signal.signal(signal.SIGINT, sig_handler)
signal.signal(signal.SIGTERM, sig_handler)
timer = Qt.QTimer()
timer.start(500)
timer.timeout.connect(lambda: None)
def quitting():
tb.stop()
tb.wait()
qapp.aboutToQuit.connect(quitting)
qapp.exec_()
if __name__ == '__main__':
main()
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