From 26fe2c32536ae419cb9056b97772655071c8d52a Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Mon, 4 Oct 2021 17:34:20 +0200
Subject: Create first AM simulation

It implements the easiest, crappiest AM moulator.
---
 tests/Simulation/Simluation.grc | 399 ++++++++++++++++++++++++++++++++++++++++
 tests/Simulation/Simluation.py  | 236 ++++++++++++++++++++++++
 2 files changed, 635 insertions(+)
 create mode 100644 tests/Simulation/Simluation.grc
 create mode 100755 tests/Simulation/Simluation.py

diff --git a/tests/Simulation/Simluation.grc b/tests/Simulation/Simluation.grc
new file mode 100644
index 0000000..2a40da6
--- /dev/null
+++ b/tests/Simulation/Simluation.grc
@@ -0,0 +1,399 @@
+options:
+  parameters:
+    author: Naoki Pross
+    category: '[GRC Hier Blocks]'
+    cmake_opt: ''
+    comment: ''
+    copyright: ''
+    description: ''
+    gen_cmake: 'On'
+    gen_linking: dynamic
+    generate_options: qt_gui
+    hier_block_src_path: '.:'
+    id: Simluation
+    max_nouts: '0'
+    output_language: python
+    placement: (0,0)
+    qt_qss_theme: ''
+    realtime_scheduling: '1'
+    run: 'True'
+    run_command: '{python} -u {filename}'
+    run_options: prompt
+    sizing_mode: fixed
+    thread_safe_setters: ''
+    title: Simulation of a fading channel
+    window_size: ''
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [8, 8]
+    rotation: 0
+    state: enabled
+
+blocks:
+- name: carrier_freq
+  id: variable
+  parameters:
+    comment: ''
+    value: 5e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [416, 60.0]
+    rotation: 0
+    state: true
+- name: modulation_factor
+  id: variable
+  parameters:
+    comment: ''
+    value: '.7'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [520, 60.0]
+    rotation: 0
+    state: true
+- name: samp_rate
+  id: variable
+  parameters:
+    comment: ''
+    value: 128e3
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [192, 12.0]
+    rotation: 0
+    state: enabled
+- name: analog_am_demod_cf_0
+  id: analog_am_demod_cf
+  parameters:
+    affinity: ''
+    alias: ''
+    audio_decim: '1'
+    audio_pass: '5000'
+    audio_stop: '5500'
+    chan_rate: samp_rate
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [968, 380.0]
+    rotation: 0
+    state: true
+- name: analog_const_source_x_0
+  id: analog_const_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    const: '1'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    type: complex
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [104, 460.0]
+    rotation: 0
+    state: true
+- name: analog_const_source_x_1
+  id: analog_const_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    const: modulation_factor
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    type: complex
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [104, 268.0]
+    rotation: 0
+    state: true
+- name: analog_sig_source_x_0
+  id: analog_sig_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    amp: '1'
+    comment: ''
+    freq: carrier_freq
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    offset: '0'
+    phase: '0'
+    samp_rate: samp_rate
+    type: complex
+    waveform: analog.GR_COS_WAVE
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [72, 548.0]
+    rotation: 0
+    state: true
+- name: analog_sig_source_x_1
+  id: analog_sig_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    amp: '1'
+    comment: ''
+    freq: '50'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    offset: '0'
+    phase: '0'
+    samp_rate: samp_rate
+    type: complex
+    waveform: analog.GR_SQR_WAVE
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [72, 324.0]
+    rotation: 0
+    state: true
+- name: blocks_add_xx_0
+  id: blocks_add_xx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '2'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [488, 432.0]
+    rotation: 0
+    state: true
+- name: blocks_complex_to_real_0
+  id: blocks_complex_to_real
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [624, 216.0]
+    rotation: 0
+    state: true
+- name: blocks_multiply_xx_0
+  id: blocks_multiply_xx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '2'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [632, 560.0]
+    rotation: 0
+    state: true
+- name: blocks_multiply_xx_1
+  id: blocks_multiply_xx
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '2'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [328, 336.0]
+    rotation: 0
+    state: true
+- name: blocks_throttle_0
+  id: blocks_throttle
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    ignoretag: 'True'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    samples_per_second: samp_rate * 2
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [760, 572.0]
+    rotation: 0
+    state: true
+- name: fosphor_glfw_sink_c_0
+  id: fosphor_glfw_sink_c
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    freq_center: '0'
+    freq_span: samp_rate
+    wintype: firdes.WIN_BLACKMAN_hARRIS
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1000, 564.0]
+    rotation: 0
+    state: true
+- name: note_0
+  id: note
+  parameters:
+    alias: ''
+    comment: ''
+    note: AM modulator parameters
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [432, 12.0]
+    rotation: 0
+    state: true
+- name: qtgui_time_sink_x_0
+  id: qtgui_time_sink_x
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha1: '1.0'
+    alpha10: '1.0'
+    alpha2: '1.0'
+    alpha3: '1.0'
+    alpha4: '1.0'
+    alpha5: '1.0'
+    alpha6: '1.0'
+    alpha7: '1.0'
+    alpha8: '1.0'
+    alpha9: '1.0'
+    autoscale: 'True'
+    axislabels: 'True'
+    color1: blue
+    color10: dark blue
+    color2: red
+    color3: green
+    color4: black
+    color5: cyan
+    color6: magenta
+    color7: yellow
+    color8: dark red
+    color9: dark green
+    comment: ''
+    ctrlpanel: 'False'
+    entags: 'True'
+    grid: 'True'
+    gui_hint: ''
+    label1: Original
+    label10: Signal 10
+    label2: Demodulated
+    label3: Signal 3
+    label4: Signal 4
+    label5: Signal 5
+    label6: Signal 6
+    label7: Signal 7
+    label8: Signal 8
+    label9: Signal 9
+    legend: 'True'
+    marker1: '-1'
+    marker10: '-1'
+    marker2: '-1'
+    marker3: '-1'
+    marker4: '-1'
+    marker5: '-1'
+    marker6: '-1'
+    marker7: '-1'
+    marker8: '-1'
+    marker9: '-1'
+    name: '"Demodulated AM signal"'
+    nconnections: '2'
+    size: '1024'
+    srate: samp_rate
+    stemplot: 'False'
+    style1: '1'
+    style10: '1'
+    style2: '1'
+    style3: '1'
+    style4: '1'
+    style5: '1'
+    style6: '1'
+    style7: '1'
+    style8: '1'
+    style9: '1'
+    tr_chan: '0'
+    tr_delay: 1e-3
+    tr_level: '0.0'
+    tr_mode: qtgui.TRIG_MODE_NORM
+    tr_slope: qtgui.TRIG_SLOPE_POS
+    tr_tag: '""'
+    type: float
+    update_time: 1e-1
+    width1: '1'
+    width10: '1'
+    width2: '1'
+    width3: '1'
+    width4: '1'
+    width5: '1'
+    width6: '1'
+    width7: '1'
+    width8: '1'
+    width9: '1'
+    ylabel: Amplitude
+    ymax: '1'
+    ymin: '-1'
+    yunit: '""'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1192, 204.0]
+    rotation: 0
+    state: true
+
+connections:
+- [analog_am_demod_cf_0, '0', qtgui_time_sink_x_0, '1']
+- [analog_const_source_x_0, '0', blocks_add_xx_0, '1']
+- [analog_const_source_x_1, '0', blocks_multiply_xx_1, '0']
+- [analog_sig_source_x_0, '0', blocks_multiply_xx_0, '1']
+- [analog_sig_source_x_1, '0', blocks_multiply_xx_1, '1']
+- [blocks_add_xx_0, '0', blocks_complex_to_real_0, '0']
+- [blocks_add_xx_0, '0', blocks_multiply_xx_0, '0']
+- [blocks_complex_to_real_0, '0', qtgui_time_sink_x_0, '0']
+- [blocks_multiply_xx_0, '0', blocks_throttle_0, '0']
+- [blocks_multiply_xx_1, '0', blocks_add_xx_0, '0']
+- [blocks_throttle_0, '0', analog_am_demod_cf_0, '0']
+- [blocks_throttle_0, '0', fosphor_glfw_sink_c_0, '0']
+
+metadata:
+  file_format: 1
diff --git a/tests/Simulation/Simluation.py b/tests/Simulation/Simluation.py
new file mode 100755
index 0000000..e9986ee
--- /dev/null
+++ b/tests/Simulation/Simluation.py
@@ -0,0 +1,236 @@
+#!/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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