Update QAM flowgraph and show crosscorrelation

4 files changed, 69 insertions, 195 deletions

diff --git a/flowgraphs/qam_sim.grc b/flowgraphs/qam_sim.grc
index b7aee4b..02b174c 100644
--- a/flowgraphs/qam_sim.grc
+++ b/flowgraphs/qam_sim.grc
@@ -8,7 +8,7 @@ options:
     description: ''
     gen_cmake: 'On'
     gen_linking: dynamic
-    generate_options: qt_gui
+    generate_options: no_gui
     hier_block_src_path: '.:'
     id: qam_sim
     max_nouts: '0'
@@ -208,7 +208,7 @@ blocks:
     bus_structure: null
     coordinate: [1088, 1080.0]
     rotation: 0
-    state: true
+    state: disabled
 - name: blocks_null_source_0
   id: blocks_null_source
   parameters:
@@ -385,7 +385,7 @@ blocks:
     bus_structure: null
     coordinate: [600, 572.0]
     rotation: 0
-    state: enabled
+    state: disabled
 - name: digital_constellation_decoder_cb_0
   id: digital_constellation_decoder_cb
   parameters:
@@ -488,6 +488,7 @@ blocks:
 - name: fadingui_ber_0
   id: fadingui_ber
   parameters:
+    address: udp://localhost:31415
     affinity: ''
     alias: ''
     comment: ''
@@ -534,11 +535,11 @@ blocks:
     bus_structure: null
     coordinate: [648, 740.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: fadingui_netsink_0
   id: fadingui_netsink
   parameters:
-    address: udp://localhost:31415
+    address: udp://localhost:31416
     affinity: ''
     alias: ''
     comment: ''
@@ -548,13 +549,13 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [704, 316.0]
+    coordinate: [984, 620.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: fadingui_netsink_1
   id: fadingui_netsink
   parameters:
-    address: udp://localhost:31415
+    address: udp://localhost:31418
     affinity: ''
     alias: ''
     comment: ''
@@ -564,13 +565,13 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [768, 916.0]
+    coordinate: [800, 916.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: fadingui_netsink_3
   id: fadingui_netsink
   parameters:
-    address: udp://localhost:31415
+    address: udp://localhost:31419
     affinity: ''
     alias: ''
     comment: ''
@@ -582,11 +583,11 @@ blocks:
     bus_structure: null
     coordinate: [1280, 916.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: fadingui_netsink_4
   id: fadingui_netsink
   parameters:
-    address: udp://localhost:31415
+    address: udp://localhost:31417
     affinity: ''
     alias: ''
     comment: ''
@@ -598,7 +599,7 @@ blocks:
     bus_structure: null
     coordinate: [528, 916.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: fadingui_phasecorrection_0
   id: fadingui_phasecorrection
   parameters:
@@ -719,7 +720,7 @@ blocks:
     bus_structure: null
     coordinate: [1304, 800.0]
     rotation: 0
-    state: true
+    state: disabled
 - name: qtgui_time_sink_x_0
   id: qtgui_time_sink_x
   parameters:
@@ -816,7 +817,7 @@ blocks:
     bus_structure: null
     coordinate: [1272, 1060.0]
     rotation: 0
-    state: true
+    state: disabled
 - name: virtual_sink_0
   id: virtual_sink
   parameters:
@@ -908,18 +909,20 @@ connections:
 - [blocks_vector_source_x_0, '0', blocks_stream_mux_0, '0']
 - [channels_channel_model_0, '0', channels_selective_fading_model_0, '0']
 - [channels_channel_model_0, '0', fadingui_multipath_fading_0, '0']
+- [channels_selective_fading_model_0, '0', fadingui_netsink_0, '0']
 - [channels_selective_fading_model_0, '0', virtual_sink_1, '0']
 - [digital_constellation_decoder_cb_0, '0', blocks_tagged_stream_align_0, '0']
 - [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
-- [digital_constellation_modulator_0, '0', fadingui_netsink_0, '0']
 - [digital_corr_est_cc_0, '0', fadingui_phasecorrection_0, '0']
 - [digital_corr_est_cc_0, '1', blocks_complex_to_mag_0, '0']
 - [digital_lms_dd_equalizer_cc_0, '0', digital_corr_est_cc_0, '0']
+- [digital_lms_dd_equalizer_cc_0, '0', fadingui_netsink_1, '0']
 - [digital_lms_dd_equalizer_cc_0, '0', qtgui_const_sink_x_0, '1']
 - [digital_pfb_clock_sync_xxx_0, '0', digital_lms_dd_equalizer_cc_0, '0']
 - [digital_pfb_clock_sync_xxx_0, '0', fadingui_netsink_4, '0']
 - [digital_pfb_clock_sync_xxx_0, '0', qtgui_const_sink_x_0, '0']
 - [fadingui_datasource_0, '0', digital_constellation_modulator_0, '0']
+- [fadingui_multipath_fading_0, '0', fadingui_netsink_0, '0']
 - [fadingui_multipath_fading_0, '0', virtual_sink_1, '0']
 - [fadingui_phasecorrection_0, '0', fadingui_netsink_3, '0']
 - [fadingui_phasecorrection_0, '0', qtgui_const_sink_x_0, '2']
diff --git a/flowgraphs/qam_sim.py b/flowgraphs/qam_sim.py
index b450f74..66045c2 100755
--- a/flowgraphs/qam_sim.py
+++ b/flowgraphs/qam_sim.py
@@ -9,25 +9,10 @@
 # Author: Naoki Sean Pross, Sara Cinzia Halter
 # 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 blocks
 import numpy
 from gnuradio import channels
+from gnuradio.filter import firdes
 from gnuradio import digital
 from gnuradio import gr
 import sys
@@ -38,40 +23,11 @@ from gnuradio import eng_notation
 import fadingui
 import numpy as np
 
-from gnuradio import qtgui
 
-class qam_sim(gr.top_block, Qt.QWidget):
+class qam_sim(gr.top_block):
 
     def __init__(self):
         gr.top_block.__init__(self, "QAM Sim")
-        Qt.QWidget.__init__(self)
-        self.setWindowTitle("QAM Sim")
-        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", "qam_sim")
-
-        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
@@ -90,95 +46,13 @@ class qam_sim(gr.top_block, Qt.QWidget):
         ##################################################
         # Blocks
         ##################################################
-        self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
-            1024, #size
-            samp_rate / sps, #samp_rate
-            "", #name
-            1 #number of inputs
-        )
-        self.qtgui_time_sink_x_0.set_update_time(0.10)
-        self.qtgui_time_sink_x_0.set_y_axis(0, 10)
-
-        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_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, 0, "")
-        self.qtgui_time_sink_x_0.enable_autoscale(False)
-        self.qtgui_time_sink_x_0.enable_grid(False)
-        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 = ['Signal 1', 'Signal 2', '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(1):
-            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.qtgui_const_sink_x_0 = qtgui.const_sink_c(
-            1024, #size
-            "", #name
-            3 #number of inputs
-        )
-        self.qtgui_const_sink_x_0.set_update_time(0.10)
-        self.qtgui_const_sink_x_0.set_y_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_x_axis(-2, 2)
-        self.qtgui_const_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, qtgui.TRIG_SLOPE_POS, 0.0, 0, "")
-        self.qtgui_const_sink_x_0.enable_autoscale(False)
-        self.qtgui_const_sink_x_0.enable_grid(False)
-        self.qtgui_const_sink_x_0.enable_axis_labels(True)
-
-
-        labels = ['', '', '', '', '',
-            '', '', '', '', '']
-        widths = [1, 1, 1, 1, 1,
-            1, 1, 1, 1, 1]
-        colors = ["blue", "red", "red", "red", "red",
-            "red", "red", "red", "red", "red"]
-        styles = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        markers = [0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0]
-        alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
-            1.0, 1.0, 1.0, 1.0, 1.0]
-
-        for i in range(3):
-            if len(labels[i]) == 0:
-                self.qtgui_const_sink_x_0.set_line_label(i, "Data {0}".format(i))
-            else:
-                self.qtgui_const_sink_x_0.set_line_label(i, labels[i])
-            self.qtgui_const_sink_x_0.set_line_width(i, widths[i])
-            self.qtgui_const_sink_x_0.set_line_color(i, colors[i])
-            self.qtgui_const_sink_x_0.set_line_style(i, styles[i])
-            self.qtgui_const_sink_x_0.set_line_marker(i, markers[i])
-            self.qtgui_const_sink_x_0.set_line_alpha(i, alphas[i])
-
-        self._qtgui_const_sink_x_0_win = sip.wrapinstance(self.qtgui_const_sink_x_0.pyqwidget(), Qt.QWidget)
-        self.top_grid_layout.addWidget(self._qtgui_const_sink_x_0_win)
         self.fadingui_phasecorrection_0 = fadingui.phasecorrection(frame_len)
-        self.fadingui_ber_0 = fadingui.ber(vgl=testvec + list(np.zeros(4)), vlen=frame_len)
+        self.fadingui_netsink_4 = fadingui.netsink(address='udp://localhost:31417', dtype="complex", vlen=1)
+        self.fadingui_netsink_3 = fadingui.netsink(address='udp://localhost:31419', dtype="complex", vlen=1)
+        self.fadingui_netsink_1 = fadingui.netsink(address='udp://localhost:31418', dtype="complex", vlen=1)
+        self.fadingui_netsink_0 = fadingui.netsink(address='udp://localhost:31416', dtype="complex", vlen=1)
+        self.fadingui_multipath_fading_0 = fadingui.multipath_fading(amplitudes=[0.12], delays=[1.8], los =True)
+        self.fadingui_ber_0 = fadingui.ber(vgl=testvec + list(np.zeros(4)), vlen=frame_len,address='udp://localhost:31415')
         self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, 2 * np.pi / 100, rrc_taps, 32, 16, 1.5, 1)
         self.digital_lms_dd_equalizer_cc_0 = digital.lms_dd_equalizer_cc(2, 5e-3, 1, qam_const)
         self.digital_corr_est_cc_0 = digital.corr_est_cc(access_code_symbols, 1, len(access_code_symbols) // 2, 0.9, digital.THRESHOLD_ABSOLUTE)
@@ -191,7 +65,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
             verbose=False,
             log=False)
         self.digital_constellation_decoder_cb_0 = digital.constellation_decoder_cb(qam_const)
-        self.channels_selective_fading_model_0 = channels.selective_fading_model( 8, ((4*carrier_freq)/(3*10e8))/samp_rate, False, 4.0, 21, (0,1.8), (1,0.12), 8 )
         self.channels_channel_model_0 = channels.channel_model(
             noise_voltage=100e-3,
             frequency_offset=0,
@@ -206,7 +79,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
         self.blocks_stream_mux_0 = blocks.stream_mux(gr.sizeof_char*1, [len(testvec), 4, 0])
         self.blocks_repack_bits_bb_0 = blocks.repack_bits_bb(2, 8, "", False, gr.GR_LSB_FIRST)
         self.blocks_null_source_0 = blocks.null_source(gr.sizeof_char*1)
-        self.blocks_complex_to_mag_0 = blocks.complex_to_mag(1)
         self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 255, 400))), True)
 
 
@@ -215,7 +87,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
         # Connections
         ##################################################
         self.connect((self.analog_random_source_x_0, 0), (self.blocks_stream_mux_0, 1))
-        self.connect((self.blocks_complex_to_mag_0, 0), (self.qtgui_time_sink_x_0, 0))
         self.connect((self.blocks_null_source_0, 0), (self.blocks_stream_mux_0, 2))
         self.connect((self.blocks_repack_bits_bb_0, 0), (self.blocks_stream_to_vector_0, 0))
         self.connect((self.blocks_stream_mux_0, 0), (self.digital_constellation_modulator_0, 0))
@@ -223,25 +94,20 @@ class qam_sim(gr.top_block, Qt.QWidget):
         self.connect((self.blocks_tagged_stream_align_0, 0), (self.blocks_repack_bits_bb_0, 0))
         self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
         self.connect((self.blocks_vector_source_x_0, 0), (self.blocks_stream_mux_0, 0))
-        self.connect((self.channels_channel_model_0, 0), (self.channels_selective_fading_model_0, 0))
-        self.connect((self.channels_selective_fading_model_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
+        self.connect((self.channels_channel_model_0, 0), (self.fadingui_multipath_fading_0, 0))
         self.connect((self.digital_constellation_decoder_cb_0, 0), (self.blocks_tagged_stream_align_0, 0))
         self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
-        self.connect((self.digital_corr_est_cc_0, 1), (self.blocks_complex_to_mag_0, 0))
         self.connect((self.digital_corr_est_cc_0, 0), (self.fadingui_phasecorrection_0, 0))
         self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.digital_corr_est_cc_0, 0))
-        self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.qtgui_const_sink_x_0, 1))
+        self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.fadingui_netsink_1, 0))
         self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_lms_dd_equalizer_cc_0, 0))
-        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_const_sink_x_0, 0))
+        self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.fadingui_netsink_4, 0))
+        self.connect((self.fadingui_multipath_fading_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
+        self.connect((self.fadingui_multipath_fading_0, 0), (self.fadingui_netsink_0, 0))
         self.connect((self.fadingui_phasecorrection_0, 0), (self.digital_constellation_decoder_cb_0, 0))
-        self.connect((self.fadingui_phasecorrection_0, 0), (self.qtgui_const_sink_x_0, 2))
+        self.connect((self.fadingui_phasecorrection_0, 0), (self.fadingui_netsink_3, 0))
 
 
-    def closeEvent(self, event):
-        self.settings = Qt.QSettings("GNU Radio", "qam_sim")
-        self.settings.setValue("geometry", self.saveGeometry())
-        event.accept()
-
     def get_testvec(self):
         return self.testvec
 
@@ -256,7 +122,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
     def set_sps(self, sps):
         self.sps = sps
         self.set_rrc_taps(firdes.root_raised_cosine(self.nfilts, self.nfilts, 1.0/float(self.sps), self.excess_bw, 45*self.nfilts))
-        self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate / self.sps)
 
     def get_nfilts(self):
         return self.nfilts
@@ -278,8 +143,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
     def set_samp_rate(self, samp_rate):
         self.samp_rate = samp_rate
         self.blocks_throttle_0.set_sample_rate(self.samp_rate)
-        self.channels_selective_fading_model_0.set_fDTs(((4*self.carrier_freq)/(3*10e8))/self.samp_rate)
-        self.qtgui_time_sink_x_0.set_samp_rate(self.samp_rate / self.sps)
 
     def get_rrc_taps(self):
         return self.rrc_taps
@@ -305,7 +168,6 @@ class qam_sim(gr.top_block, Qt.QWidget):
 
     def set_carrier_freq(self, carrier_freq):
         self.carrier_freq = carrier_freq
-        self.channels_selective_fading_model_0.set_fDTs(((4*self.carrier_freq)/(3*10e8))/self.samp_rate)
 
     def get_access_code_symbols(self):
         return self.access_code_symbols
@@ -321,34 +183,21 @@ class qam_sim(gr.top_block, Qt.QWidget):
 def main(top_block_cls=qam_sim, 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()
+        tb.stop()
+        tb.wait()
+
+        sys.exit(0)
 
     signal.signal(signal.SIGINT, sig_handler)
     signal.signal(signal.SIGTERM, sig_handler)
 
-    timer = Qt.QTimer()
-    timer.start(500)
-    timer.timeout.connect(lambda: None)
+    tb.start()
 
-    def quitting():
-        tb.stop()
-        tb.wait()
+    tb.wait()
 
-    qapp.aboutToQuit.connect(quitting)
-    qapp.exec_()
 
 if __name__ == '__main__':
     main()
diff --git a/flowgraphs/qpsk_sim.grc b/flowgraphs/qpsk_sim.grc
index efd8999..7be9ec8 100644
--- a/flowgraphs/qpsk_sim.grc
+++ b/flowgraphs/qpsk_sim.grc
@@ -210,7 +210,7 @@ blocks:
     bus_structure: null
     coordinate: [1064, 1080.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: blocks_repack_bits_bb_0
   id: blocks_repack_bits_bb
   parameters:
@@ -471,7 +471,7 @@ blocks:
 - name: fadingui_ber_0
   id: fadingui_ber
   parameters:
-    address: udp://localhost:31415
+    address: udp://localhost:31420
     affinity: ''
     alias: ''
     comment: ''
@@ -481,7 +481,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1184, 1292.0]
+    coordinate: [1200, 1292.0]
     rotation: 0
     state: true
 - name: fadingui_datasource_0
@@ -532,7 +532,23 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [704, 316.0]
+    coordinate: [992, 620.0]
+    rotation: 0
+    state: enabled
+- name: fadingui_netsink_0_0
+  id: fadingui_netsink
+  parameters:
+    address: udp://localhost:31415
+    affinity: ''
+    alias: ''
+    comment: ''
+    type: float
+    veclen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [1248, 1148.0]
     rotation: 0
     state: enabled
 - name: fadingui_netsink_1
@@ -882,6 +898,7 @@ blocks:
 
 connections:
 - [analog_random_source_x_0, '0', blocks_stream_mux_0, '1']
+- [blocks_complex_to_mag_0, '0', fadingui_netsink_0_0, '0']
 - [blocks_complex_to_mag_0, '0', qtgui_time_sink_x_0, '0']
 - [blocks_repack_bits_bb_0, '0', blocks_stream_to_vector_0, '0']
 - [blocks_stream_mux_0, '0', digital_constellation_modulator_0, '0']
@@ -891,17 +908,18 @@ connections:
 - [blocks_vector_source_x_0, '0', blocks_stream_mux_0, '0']
 - [channels_channel_model_0, '0', channels_selective_fading_model_0, '0']
 - [channels_channel_model_0, '0', fadingui_multipath_fading_0, '0']
+- [channels_selective_fading_model_0, '0', fadingui_netsink_0, '0']
 - [channels_selective_fading_model_0, '0', virtual_sink_1, '0']
 - [digital_cma_equalizer_cc_0, '0', digital_corr_est_cc_0, '0']
 - [digital_cma_equalizer_cc_0, '0', fadingui_netsink_1, '0']
 - [digital_constellation_decoder_cb_0, '0', blocks_tagged_stream_align_0, '0']
 - [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
-- [digital_constellation_modulator_0, '0', fadingui_netsink_0, '0']
 - [digital_corr_est_cc_0, '0', fadingui_phasecorrection_0, '0']
 - [digital_corr_est_cc_0, '1', blocks_complex_to_mag_0, '0']
 - [digital_pfb_clock_sync_xxx_0, '0', digital_cma_equalizer_cc_0, '0']
 - [digital_pfb_clock_sync_xxx_0, '0', fadingui_netsink_4, '0']
 - [fadingui_datasource_0, '0', digital_constellation_modulator_0, '0']
+- [fadingui_multipath_fading_0, '0', fadingui_netsink_0, '0']
 - [fadingui_multipath_fading_0, '0', virtual_sink_1, '0']
 - [fadingui_phasecorrection_0, '0', fadingui_netsink_3, '0']
 - [fadingui_phasecorrection_0, '0', qtgui_const_sink_x_0, '0']
diff --git a/flowgraphs/qpsk_sim.py b/flowgraphs/qpsk_sim.py
index f2d1a26..b633bba 100755
--- a/flowgraphs/qpsk_sim.py
+++ b/flowgraphs/qpsk_sim.py
@@ -50,9 +50,10 @@ class qpsk_sim(gr.top_block):
         self.fadingui_netsink_4 = fadingui.netsink(address='udp://localhost:31417', dtype="complex", vlen=1)
         self.fadingui_netsink_3 = fadingui.netsink(address='udp://localhost:31419', dtype="complex", vlen=1)
         self.fadingui_netsink_1 = fadingui.netsink(address='udp://localhost:31418', dtype="complex", vlen=1)
+        self.fadingui_netsink_0_0 = fadingui.netsink(address='udp://localhost:31415', dtype="float", vlen=1)
         self.fadingui_netsink_0 = fadingui.netsink(address='udp://localhost:31416', dtype="complex", vlen=1)
         self.fadingui_multipath_fading_0 = fadingui.multipath_fading(amplitudes=[0.12], delays=[1.8], los =True)
-        self.fadingui_ber_0 = fadingui.ber(vgl=testvec + list(np.zeros(4)), vlen=frame_len,address='udp://localhost:31415')
+        self.fadingui_ber_0 = fadingui.ber(vgl=testvec + list(np.zeros(4)), vlen=frame_len,address='udp://localhost:31420')
         self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, 2 * np.pi / 100, rrc_taps, 32, 16, 1.5, 1)
         self.digital_corr_est_cc_0 = digital.corr_est_cc(access_code_symbols, 1, len(access_code_symbols) // 2, 0.9, digital.THRESHOLD_ABSOLUTE)
         self.digital_constellation_modulator_0 = digital.generic_mod(
@@ -78,6 +79,7 @@ class qpsk_sim(gr.top_block):
         self.blocks_stream_to_vector_0 = blocks.stream_to_vector(gr.sizeof_char*1, frame_len)
         self.blocks_stream_mux_0 = blocks.stream_mux(gr.sizeof_char*1, [len(testvec), 4])
         self.blocks_repack_bits_bb_0 = blocks.repack_bits_bb(2, 8, "", False, gr.GR_LSB_FIRST)
+        self.blocks_complex_to_mag_0 = blocks.complex_to_mag(1)
         self.analog_random_source_x_0 = blocks.vector_source_b(list(map(int, numpy.random.randint(0, 255, 400))), True)
 
 
@@ -86,6 +88,7 @@ class qpsk_sim(gr.top_block):
         # Connections
         ##################################################
         self.connect((self.analog_random_source_x_0, 0), (self.blocks_stream_mux_0, 1))
+        self.connect((self.blocks_complex_to_mag_0, 0), (self.fadingui_netsink_0_0, 0))
         self.connect((self.blocks_repack_bits_bb_0, 0), (self.blocks_stream_to_vector_0, 0))
         self.connect((self.blocks_stream_mux_0, 0), (self.digital_constellation_modulator_0, 0))
         self.connect((self.blocks_stream_to_vector_0, 0), (self.fadingui_ber_0, 0))
@@ -97,11 +100,12 @@ class qpsk_sim(gr.top_block):
         self.connect((self.digital_cma_equalizer_cc_0, 0), (self.fadingui_netsink_1, 0))
         self.connect((self.digital_constellation_decoder_cb_0, 0), (self.blocks_tagged_stream_align_0, 0))
         self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
-        self.connect((self.digital_constellation_modulator_0, 0), (self.fadingui_netsink_0, 0))
+        self.connect((self.digital_corr_est_cc_0, 1), (self.blocks_complex_to_mag_0, 0))
         self.connect((self.digital_corr_est_cc_0, 0), (self.fadingui_phasecorrection_0, 0))
         self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0))
         self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.fadingui_netsink_4, 0))
         self.connect((self.fadingui_multipath_fading_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
+        self.connect((self.fadingui_multipath_fading_0, 0), (self.fadingui_netsink_0, 0))
         self.connect((self.fadingui_phasecorrection_0, 0), (self.digital_constellation_decoder_cb_0, 0))
         self.connect((self.fadingui_phasecorrection_0, 0), (self.fadingui_netsink_3, 0))