Attempt CAZAC correlation codes in 16-QAM (not working)

2 files changed, 357 insertions, 73 deletions

diff --git a/flowgraphs/qam_sim.grc b/flowgraphs/qam_sim.grc
index 02b174c..f1f9cc9 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: no_gui
+    generate_options: qt_gui
     hier_block_src_path: '.:'
     id: qam_sim
     max_nouts: '0'
@@ -32,19 +32,78 @@ options:
     state: enabled
 
 blocks:
-- name: access_code_symbols
+- name: access_code
   id: variable
   parameters:
     comment: ''
-    value: '[(-0.31622776601683794-0.31622776601683794j), (-0.31622776601683794+0.31622776601683794j),
-      (-0.9486832980505138-0.9486832980505138j), (-0.9486832980505138-0.31622776601683794j)]'
+    value: np.exp(1j * (np.pi * 13 * np.arange(20) ** 20 / 20))
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [792, 1092.0]
+    coordinate: [32, 348.0]
     rotation: 0
     state: true
+- name: access_code_sps
+  id: variable
+  parameters:
+    comment: ''
+    value: np.asarray(np.matmul(np.matrix(access_code).T, np.matrix(np.ones(sps)))).ravel()
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [424, 196.0]
+    rotation: 0
+    state: disabled
+- name: access_code_sps
+  id: variable
+  parameters:
+    comment: ''
+    value: '[(1+0j), (1+0j), (1+0j), (1+0j), (-0.4539904997395467+0.8910065241883679j),
+      (-0.4539904997395467+0.8910065241883679j), (-0.4539904997395467+0.8910065241883679j),
+      (-0.4539904997395467+0.8910065241883679j), (0.30901699445433095+0.9510565162693603j),
+      (0.30901699445433095+0.9510565162693603j), (0.30901699445433095+0.9510565162693603j),
+      (0.30901699445433095+0.9510565162693603j), (-0.45399010831290065+0.8910067236300974j),
+      (-0.45399010831290065+0.8910067236300974j), (-0.45399010831290065+0.8910067236300974j),
+      (-0.45399010831290065+0.8910067236300974j), (0.30910023286329796+0.9510294664435246j),
+      (0.30910023286329796+0.9510294664435246j), (0.30910023286329796+0.9510294664435246j),
+      (0.30910023286329796+0.9510294664435246j), (0.6958765427916561+0.7181614283657487j),
+      (0.6958765427916561+0.7181614283657487j), (0.6958765427916561+0.7181614283657487j),
+      (0.6958765427916561+0.7181614283657487j), (0.6995785030650676+0.7145557487343022j),
+      (0.6995785030650676+0.7145557487343022j), (0.6995785030650676+0.7145557487343022j),
+      (0.6995785030650676+0.7145557487343022j), (-0.8755764602527171+0.4830795609952073j),
+      (-0.8755764602527171+0.4830795609952073j), (-0.8755764602527171+0.4830795609952073j),
+      (-0.8755764602527171+0.4830795609952073j), (-0.8320971948858552-0.5546298389584634j),
+      (-0.8320971948858552-0.5546298389584634j), (-0.8320971948858552-0.5546298389584634j),
+      (-0.8320971948858552-0.5546298389584634j), (0.13124680853227685+0.9913497239874998j),
+      (0.13124680853227685+0.9913497239874998j), (0.13124680853227685+0.9913497239874998j),
+      (0.13124680853227685+0.9913497239874998j), (0.9219105024602736-0.38740292390926256j),
+      (0.9219105024602736-0.38740292390926256j), (0.9219105024602736-0.38740292390926256j),
+      (0.9219105024602736-0.38740292390926256j), (0.9881969645782696-0.15318863925988194j),
+      (0.9881969645782696-0.15318863925988194j), (0.9881969645782696-0.15318863925988194j),
+      (0.9881969645782696-0.15318863925988194j), (-0.5511352729247617-0.8344159100461522j),
+      (-0.5511352729247617-0.8344159100461522j), (-0.5511352729247617-0.8344159100461522j),
+      (-0.5511352729247617-0.8344159100461522j), (-0.24665339430031927+0.9691037628036181j),
+      (-0.24665339430031927+0.9691037628036181j), (-0.24665339430031927+0.9691037628036181j),
+      (-0.24665339430031927+0.9691037628036181j), (-0.44951814008601154-0.8932712027898431j),
+      (-0.44951814008601154-0.8932712027898431j), (-0.44951814008601154-0.8932712027898431j),
+      (-0.44951814008601154-0.8932712027898431j), (-0.23300791854304934-0.9724748376673998j),
+      (-0.23300791854304934-0.9724748376673998j), (-0.23300791854304934-0.9724748376673998j),
+      (-0.23300791854304934-0.9724748376673998j), (1+0j), (1+0j), (1+0j), (1+0j),
+      (0.8559628469680924+0.5170373338650489j), (0.8559628469680924+0.5170373338650489j),
+      (0.8559628469680924+0.5170373338650489j), (0.8559628469680924+0.5170373338650489j),
+      (-0.8354473464520049-0.5495704971214372j), (-0.8354473464520049-0.5495704971214372j),
+      (-0.8354473464520049-0.5495704971214372j), (-0.8354473464520049-0.5495704971214372j),
+      (-0.999246638643493+0.03880921488101298j), (-0.999246638643493+0.03880921488101298j),
+      (-0.999246638643493+0.03880921488101298j), (-0.999246638643493+0.03880921488101298j)]'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [256, 196.0]
+    rotation: 0
+    state: disabled
 - name: carrier_freq
   id: variable
   parameters:
@@ -54,7 +113,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [472, 572.0]
+    coordinate: [472, 756.0]
     rotation: 0
     state: true
 - name: excess_bw
@@ -66,7 +125,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [336, 1156.0]
+    coordinate: [336, 1332.0]
     rotation: 0
     state: true
 - name: frame
@@ -80,7 +139,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 612.0]
+    coordinate: [48, 796.0]
     rotation: 0
     state: disabled
 - name: frame_len
@@ -92,7 +151,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [184, 252.0]
+    coordinate: [184, 436.0]
     rotation: 0
     state: true
 - name: nfilts
@@ -104,7 +163,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [256, 1156.0]
+    coordinate: [256, 1332.0]
     rotation: 0
     state: true
 - name: qam_const
@@ -122,7 +181,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [472, 356.0]
+    coordinate: [472, 532.0]
     rotation: 0
     state: true
 - name: rrc_taps
@@ -134,7 +193,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [432, 1156.0]
+    coordinate: [432, 1332.0]
     rotation: 0
     state: true
 - name: samp_rate
@@ -170,7 +229,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 252.0]
+    coordinate: [48, 436.0]
     rotation: 0
     state: true
 - name: analog_random_source_x_0
@@ -190,7 +249,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 420.0]
+    coordinate: [40, 604.0]
     rotation: 0
     state: true
 - name: blocks_complex_to_mag_0
@@ -206,9 +265,9 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1088, 1080.0]
+    coordinate: [1088, 1272.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: blocks_null_source_0
   id: blocks_null_source
   parameters:
@@ -225,7 +284,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 528.0]
+    coordinate: [48, 712.0]
     rotation: 0
     state: true
 - name: blocks_repack_bits_bb_0
@@ -245,7 +304,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [768, 1300.0]
+    coordinate: [768, 1476.0]
     rotation: 0
     state: true
 - name: blocks_stream_mux_0
@@ -264,9 +323,28 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [272, 416.0]
+    coordinate: [272, 600.0]
     rotation: 0
     state: true
+- name: blocks_stream_mux_1
+  id: blocks_stream_mux
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    lengths: '[len(access_code)*4, len(testvec)//4*sps]'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    num_inputs: '2'
+    type: complex
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [728, 528.0]
+    rotation: 0
+    state: disabled
 - name: blocks_stream_to_vector_0
   id: blocks_stream_to_vector
   parameters:
@@ -282,7 +360,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [992, 1312.0]
+    coordinate: [1000, 1488.0]
     rotation: 0
     state: true
 - name: blocks_tagged_stream_align_0
@@ -300,7 +378,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [496, 1308.0]
+    coordinate: [496, 1484.0]
     rotation: 0
     state: true
 - name: blocks_throttle_0
@@ -319,7 +397,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [744, 444.0]
+    coordinate: [864, 628.0]
     rotation: 0
     state: true
 - name: blocks_vector_source_x_0
@@ -339,9 +417,29 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 324.0]
+    coordinate: [48, 508.0]
     rotation: 0
     state: true
+- name: blocks_vector_source_x_1
+  id: blocks_vector_source_x
+  parameters:
+    affinity: ''
+    alias: ''
+    comment: ''
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    repeat: 'True'
+    tags: '[]'
+    type: complex
+    vector: access_code_sps
+    vlen: '1'
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [256, 300.0]
+    rotation: 0
+    state: disabled
 - name: channels_channel_model_0
   id: channels_channel_model
   parameters:
@@ -360,7 +458,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [312, 716.0]
+    coordinate: [312, 900.0]
     rotation: 0
     state: enabled
 - name: channels_selective_fading_model_0
@@ -373,7 +471,7 @@ blocks:
     alias: ''
     comment: ''
     delays: (0,1.8)
-    fDTs: ((4*carrier_freq)/(3*10e8))/samp_rate
+    fDTs: ((2*carrier_freq)/(3*10e8))/samp_rate
     mags: (1,0.12)
     maxoutbuf: '0'
     minoutbuf: '0'
@@ -383,9 +481,9 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [600, 572.0]
+    coordinate: [600, 748.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: digital_constellation_decoder_cb_0
   id: digital_constellation_decoder_cb
   parameters:
@@ -399,7 +497,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [256, 1308.0]
+    coordinate: [256, 1484.0]
     rotation: 0
     state: true
 - name: digital_constellation_modulator_0
@@ -420,7 +518,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [472, 420.0]
+    coordinate: [472, 604.0]
     rotation: 0
     state: true
 - name: digital_corr_est_cc_0
@@ -429,18 +527,18 @@ blocks:
     affinity: ''
     alias: ''
     comment: ''
-    mark_delay: len(access_code_symbols) // 2
+    mark_delay: len(access_code) // 2
     maxoutbuf: '0'
     minoutbuf: '0'
     sps: '1'
-    symbols: access_code_symbols
+    symbols: access_code
     threshold: '0.9'
     threshold_method: digital.THRESHOLD_ABSOLUTE
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [792, 972.0]
+    coordinate: [792, 1148.0]
     rotation: 0
     state: true
 - name: digital_lms_dd_equalizer_cc_0
@@ -453,13 +551,13 @@ blocks:
     maxoutbuf: '0'
     minoutbuf: '0'
     mu: 5e-3
-    num_taps: '2'
+    num_taps: '5'
     sps: '1'
   states:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [520, 980.0]
+    coordinate: [520, 1156.0]
     rotation: 0
     state: true
 - name: digital_pfb_clock_sync_xxx_0
@@ -482,7 +580,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [248, 1004.0]
+    coordinate: [248, 1180.0]
     rotation: 0
     state: true
 - name: fadingui_ber_0
@@ -498,7 +596,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1184, 1300.0]
+    coordinate: [1200, 1468.0]
     rotation: 0
     state: true
 - name: fadingui_datasource_0
@@ -515,7 +613,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [208, 612.0]
+    coordinate: [208, 788.0]
     rotation: 0
     state: disabled
 - name: fadingui_multipath_fading_0
@@ -533,9 +631,9 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [648, 740.0]
+    coordinate: [648, 924.0]
     rotation: 0
-    state: enabled
+    state: disabled
 - name: fadingui_netsink_0
   id: fadingui_netsink
   parameters:
@@ -549,7 +647,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [984, 620.0]
+    coordinate: [984, 796.0]
     rotation: 0
     state: enabled
 - name: fadingui_netsink_1
@@ -565,7 +663,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [800, 916.0]
+    coordinate: [800, 1100.0]
     rotation: 0
     state: enabled
 - name: fadingui_netsink_3
@@ -581,7 +679,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1280, 916.0]
+    coordinate: [1280, 1100.0]
     rotation: 0
     state: enabled
 - name: fadingui_netsink_4
@@ -597,7 +695,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [528, 916.0]
+    coordinate: [528, 1100.0]
     rotation: 0
     state: enabled
 - name: fadingui_phasecorrection_0
@@ -613,7 +711,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1032, 988.0]
+    coordinate: [1032, 1164.0]
     rotation: 0
     state: enabled
 - name: import_0
@@ -718,9 +816,9 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1304, 800.0]
+    coordinate: [1304, 984.0]
     rotation: 0
-    state: disabled
+    state: enabled
 - name: qtgui_time_sink_x_0
   id: qtgui_time_sink_x
   parameters:
@@ -815,7 +913,30 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1272, 1060.0]
+    coordinate: [1320, 1252.0]
+    rotation: 0
+    state: enabled
+- name: root_raised_cosine_filter_0
+  id: root_raised_cosine_filter
+  parameters:
+    affinity: ''
+    alias: ''
+    alpha: excess_bw
+    comment: ''
+    decim: '1'
+    gain: '10'
+    interp: '1'
+    maxoutbuf: '0'
+    minoutbuf: '0'
+    ntaps: int(samp_rate)
+    samp_rate: samp_rate
+    sym_rate: 1 / sps
+    type: fir_filter_ccf
+  states:
+    bus_sink: false
+    bus_source: false
+    bus_structure: null
+    coordinate: [472, 380.0]
     rotation: 0
     state: disabled
 - name: virtual_sink_0
@@ -828,7 +949,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [952, 444.0]
+    coordinate: [1048, 628.0]
     rotation: 0
     state: true
 - name: virtual_sink_1
@@ -841,7 +962,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1000, 756.0]
+    coordinate: [1000, 940.0]
     rotation: 0
     state: true
 - name: virtual_sink_2
@@ -854,7 +975,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [1336, 988.0]
+    coordinate: [1336, 1164.0]
     rotation: 0
     state: true
 - name: virtual_source_0
@@ -867,7 +988,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 1308.0]
+    coordinate: [48, 1484.0]
     rotation: 0
     state: true
 - name: virtual_source_1
@@ -880,7 +1001,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [48, 1052.0]
+    coordinate: [48, 1228.0]
     rotation: 0
     state: true
 - name: virtual_source_2
@@ -893,7 +1014,7 @@ blocks:
     bus_sink: false
     bus_source: false
     bus_structure: null
-    coordinate: [56, 756.0]
+    coordinate: [56, 940.0]
     rotation: 0
     state: true
 
@@ -903,15 +1024,18 @@ connections:
 - [blocks_null_source_0, '0', blocks_stream_mux_0, '2']
 - [blocks_repack_bits_bb_0, '0', blocks_stream_to_vector_0, '0']
 - [blocks_stream_mux_0, '0', digital_constellation_modulator_0, '0']
+- [blocks_stream_mux_1, '0', blocks_throttle_0, '0']
 - [blocks_stream_to_vector_0, '0', fadingui_ber_0, '0']
 - [blocks_tagged_stream_align_0, '0', blocks_repack_bits_bb_0, '0']
 - [blocks_throttle_0, '0', virtual_sink_0, '0']
 - [blocks_vector_source_x_0, '0', blocks_stream_mux_0, '0']
+- [blocks_vector_source_x_1, '0', root_raised_cosine_filter_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_stream_mux_1, '1']
 - [digital_constellation_modulator_0, '0', blocks_throttle_0, '0']
 - [digital_corr_est_cc_0, '0', fadingui_phasecorrection_0, '0']
 - [digital_corr_est_cc_0, '1', blocks_complex_to_mag_0, '0']
@@ -927,6 +1051,7 @@ connections:
 - [fadingui_phasecorrection_0, '0', fadingui_netsink_3, '0']
 - [fadingui_phasecorrection_0, '0', qtgui_const_sink_x_0, '2']
 - [fadingui_phasecorrection_0, '0', virtual_sink_2, '0']
+- [root_raised_cosine_filter_0, '0', blocks_stream_mux_1, '0']
 - [virtual_source_0, '0', digital_constellation_decoder_cb_0, '0']
 - [virtual_source_1, '0', digital_pfb_clock_sync_xxx_0, '0']
 - [virtual_source_2, '0', channels_channel_model_0, '0']
diff --git a/flowgraphs/qam_sim.py b/flowgraphs/qam_sim.py
index 66045c2..bd8589b 100755
--- a/flowgraphs/qam_sim.py
+++ b/flowgraphs/qam_sim.py
@@ -9,10 +9,25 @@
 # 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
@@ -23,11 +38,40 @@ from gnuradio import eng_notation
 import fadingui
 import numpy as np
 
+from gnuradio import qtgui
 
-class qam_sim(gr.top_block):
+class qam_sim(gr.top_block, Qt.QWidget):
 
     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
@@ -41,21 +85,107 @@ class qam_sim(gr.top_block):
         self.qam_const = qam_const = digital.constellation_16qam().base()
         self.frame_len = frame_len = len(testvec) +4
         self.carrier_freq = carrier_freq = 2.4e9
-        self.access_code_symbols = access_code_symbols = [(-0.31622776601683794-0.31622776601683794j), (-0.31622776601683794+0.31622776601683794j), (-0.9486832980505138-0.9486832980505138j), (-0.9486832980505138-0.31622776601683794j)]
+        self.access_code = access_code = np.exp(1j * (np.pi * 13 * np.arange(20) ** 20 / 20))
 
         ##################################################
         # 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_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)
+        self.digital_lms_dd_equalizer_cc_0 = digital.lms_dd_equalizer_cc(5, 5e-3, 1, qam_const)
+        self.digital_corr_est_cc_0 = digital.corr_est_cc(access_code, 1, len(access_code) // 2, 0.9, digital.THRESHOLD_ABSOLUTE)
         self.digital_constellation_modulator_0 = digital.generic_mod(
             constellation=qam_const,
             differential=False,
@@ -65,6 +195,7 @@ class qam_sim(gr.top_block):
             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, ((2*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,
@@ -79,6 +210,7 @@ class qam_sim(gr.top_block):
         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)
 
 
@@ -87,6 +219,7 @@ class qam_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.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))
@@ -94,20 +227,29 @@ class qam_sim(gr.top_block):
         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.fadingui_multipath_fading_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_selective_fading_model_0, 0), (self.fadingui_netsink_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.fadingui_netsink_1, 0))
+        self.connect((self.digital_lms_dd_equalizer_cc_0, 0), (self.qtgui_const_sink_x_0, 1))
         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.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.digital_pfb_clock_sync_xxx_0, 0), (self.qtgui_const_sink_x_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))
+        self.connect((self.fadingui_phasecorrection_0, 0), (self.qtgui_const_sink_x_0, 2))
 
 
+    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
 
@@ -122,6 +264,7 @@ class qam_sim(gr.top_block):
     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
@@ -143,6 +286,8 @@ class qam_sim(gr.top_block):
     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(((2*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
@@ -168,13 +313,14 @@ class qam_sim(gr.top_block):
 
     def set_carrier_freq(self, carrier_freq):
         self.carrier_freq = carrier_freq
+        self.channels_selective_fading_model_0.set_fDTs(((2*self.carrier_freq)/(3*10e8))/self.samp_rate)
 
-    def get_access_code_symbols(self):
-        return self.access_code_symbols
+    def get_access_code(self):
+        return self.access_code
 
-    def set_access_code_symbols(self, access_code_symbols):
-        self.access_code_symbols = access_code_symbols
-        self.digital_corr_est_cc_0.set_mark_delay(len(self.access_code_symbols) // 2)
+    def set_access_code(self, access_code):
+        self.access_code = access_code
+        self.digital_corr_est_cc_0.set_mark_delay(len(self.access_code) // 2)
 
 
 
@@ -183,21 +329,34 @@ class qam_sim(gr.top_block):
 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()
 
-    def sig_handler(sig=None, frame=None):
-        tb.stop()
-        tb.wait()
+    tb.start()
+
+    tb.show()
 
-        sys.exit(0)
+    def sig_handler(sig=None, frame=None):
+        Qt.QApplication.quit()
 
     signal.signal(signal.SIGINT, sig_handler)
     signal.signal(signal.SIGTERM, sig_handler)
 
-    tb.start()
+    timer = Qt.QTimer()
+    timer.start(500)
+    timer.timeout.connect(lambda: None)
 
-    tb.wait()
+    def quitting():
+        tb.stop()
+        tb.wait()
 
+    qapp.aboutToQuit.connect(quitting)
+    qapp.exec_()
 
 if __name__ == '__main__':
     main()