Implement frame synchronization

There is an issue somewhere between the mod and demod, since frame
synchronization works on a direct path.

1 files changed, 5 insertions, 52 deletions

diff --git a/tests/fadingui/QAM/qam_nogui.py b/tests/fadingui/QAM/qam_nogui.py
index 6cde63d..4116db5 100755
--- a/tests/fadingui/QAM/qam_nogui.py
+++ b/tests/fadingui/QAM/qam_nogui.py
@@ -21,9 +21,6 @@ if __name__ == '__main__':
         except:
             print("Warning: failed to XInitThreads()")
 
-from PyQt5 import Qt
-from gnuradio import qtgui
-import sip
 from gnuradio import blocks
 from gnuradio import channels
 from gnuradio.filter import firdes
@@ -31,6 +28,7 @@ from gnuradio import digital
 from gnuradio import gr
 import sys
 import signal
+from PyQt5 import Qt
 from argparse import ArgumentParser
 from gnuradio.eng_arg import eng_float, intx
 from gnuradio import eng_notation
@@ -81,64 +79,23 @@ class qam_nogui(gr.top_block, Qt.QWidget):
         self.time_offset = time_offset = 1
         self.samp_rate = samp_rate = 32000
         self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), excess_bw, 45*nfilts)
-        self.phase_bw = phase_bw = .002
+        self.phase_bw = phase_bw = .01
         self.noise_volt = noise_volt = 0
         self.freq_offset = freq_offset = 0
         self.frame = frame = fadingui.frame_obj(preamble=[190, 239], payload_len=32768)
         self.eq_ntaps = eq_ntaps = 15
         self.eq_mod = eq_mod = 1
-        self.eq_gain = eq_gain = 10e-3
+        self.eq_gain = eq_gain = .002
         self.const = const = digital.constellation_16qam().base()
         self.chn_taps = chn_taps = [1.0 + 0.0j, ]
 
         ##################################################
         # Blocks
         ##################################################
-        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_xor_frame_sync_0 = fadingui.xor_frame_sync(sync_pattern=frame.preamble, buffer_size=frame.length * 4)
+        self.fadingui_xor_frame_sync_0 = fadingui.xor_frame_sync(sync_pattern=frame.preamble, buffer_size=frame.length * 5)
         self.fadingui_deframer_0 = fadingui.deframer(frame_obj=frame)
         self.fadingui_datasource_0 = fadingui.datasource(frame_obj=frame, filename='/home/god/Documents/Fading/tests/fadingui/QAM/lena512color.tiff')
         self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, timing_loop_bw, rrc_taps, nfilts, nfilts/2, 1.5, 1)
-        self.digital_map_bb_0 = digital.map_bb([0, 1, 3, 2])
         self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(4)
         self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, 4, False)
         self.digital_constellation_modulator_0 = digital.generic_mod(
@@ -169,15 +126,11 @@ class qam_nogui(gr.top_block, Qt.QWidget):
         self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
         self.connect((self.channels_channel_model_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))
         self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_costas_loop_cc_0, 0))
-        self.connect((self.digital_cma_equalizer_cc_0, 0), (self.qtgui_const_sink_x_0, 1))
         self.connect((self.digital_constellation_decoder_cb_0, 0), (self.digital_diff_decoder_bb_0, 0))
         self.connect((self.digital_constellation_modulator_0, 0), (self.blocks_throttle_0, 0))
         self.connect((self.digital_costas_loop_cc_0, 0), (self.digital_constellation_decoder_cb_0, 0))
-        self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_const_sink_x_0, 2))
-        self.connect((self.digital_diff_decoder_bb_0, 0), (self.digital_map_bb_0, 0))
-        self.connect((self.digital_map_bb_0, 0), (self.fadingui_xor_frame_sync_0, 0))
+        self.connect((self.digital_diff_decoder_bb_0, 0), (self.fadingui_xor_frame_sync_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.qtgui_const_sink_x_0, 0))
         self.connect((self.fadingui_datasource_0, 0), (self.digital_constellation_modulator_0, 0))
         self.connect((self.fadingui_deframer_0, 0), (self.blocks_null_sink_0, 0))
         self.connect((self.fadingui_xor_frame_sync_0, 0), (self.fadingui_deframer_0, 0))