def simulate_general_est(SNR_range):
""" All the work's done here: create flow graph, run, read out estimated SNR
:param SNR_range: range of SNR for which noise voltage will be calculated
"""
est_snr = []
for SNR in SNR_range:
noise_volt = noise_voltage(SNR)
src = blocks.vector_source_c(bits.tolist(), False)
chn = snr.channel_model_snr(0.0, 0.0, 1.0, [1, ],
0) # noise_voltage, frequency_offset, epsilon, taps, noise_seed, block_tags
chn.set_noise_voltage(noise_volt)
est = snr.mpsk_receiver_snr_est_cc(ntag, alpha)
sink = blocks.null_sink(gr.sizeof_gr_complex)
tb = gr.top_block()
tb.connect(src, chn, est, sink)
tb.run()
est_snr.append(est.snr())
return est_snr
def test_001_t (self):
N = 1000 # number of samples to use
fs = 1000 # baseband sampling rate
freq = 100 # frequency of source signal
noise_volt = 0.18 # noise voltage [V]
signal = analog.sig_source_c(fs, analog.GR_SIN_WAVE, freq, 1)
head = blocks.head(gr.sizeof_gr_complex, N)
op = snr.channel_model_snr(0.0, 0.0, 1.0, [1,], 0) # noise_voltage, frequency_offset, epsilon, taps, noise_seed, block_tags
est = snr.mpsk_receiver_snr_est_cc(1000, 0.001) # ntag, alpha
snk = blocks.vector_sink_c()
op.set_noise_voltage(0.18)
op.set_frequency_offset(0.0)
op.set_taps([1,])
op.set_timing_offset(1.0)
self.tb.connect(signal, head, op, est, snk)
self.tb.run()
est_snr = est.snr()
exp_snr = 20*math.log10(1/noise_volt)
def test_001_t(self):
N = 1000 # number of samples to use
fs = 1000 # baseband sampling rate
freq = 100 # frequency of source signal
noise_volt = 0.18 # noise voltage [V]
signal = analog.sig_source_c(fs, analog.GR_SIN_WAVE, freq, 1)
head = blocks.head(gr.sizeof_gr_complex, N)
op = snr.channel_model_snr(
0.0, 0.0, 1.0, [1], 0
) # noise_voltage, frequency_offset, epsilon, taps, noise_seed, block_tags
est = snr.mpsk_receiver_snr_est_cc(1000, 0.001) # ntag, alpha
snk = blocks.vector_sink_c()
op.set_noise_voltage(0.18)
op.set_frequency_offset(0.0)
op.set_taps([1])
op.set_timing_offset(1.0)
self.tb.connect(signal, head, op, est, snk)
self.tb.run()
est_snr = est.snr()
exp_snr = 20 * math.log10(1 / noise_volt)
def __init__(self):
gr.top_block.__init__(self, "Mpsk Simul")
Qt.QWidget.__init__(self)
self.setWindowTitle("Mpsk Simul")
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", "mpsk_simul")
self.restoreGeometry(self.settings.value("geometry").toByteArray())
##################################################
# Variables
##################################################
self.sps = sps = 8
self.nfilts = nfilts = 32
self.timing_loop_bw = timing_loop_bw = 6.28/100.0
self.time_offset = time_offset = 1.00
self.taps = taps = [1.0 + 0.0j, ]
self.samp_rate = samp_rate = 32000
self.rrc_taps = rrc_taps = firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), 0.35, 11*sps*nfilts)
self.phase_bw = phase_bw = 6.28/100.0
self.noise_volt = noise_volt = 0.001
self.freq_offset = freq_offset = 0
self.eq_gain = eq_gain = 0.01
self.arity = arity = 8
##################################################
# Blocks
##################################################
self._timing_loop_bw_range = Range(0.0, 0.2, 0.01, 6.28/100.0, 200)
self._timing_loop_bw_win = RangeWidget(self._timing_loop_bw_range, self.set_timing_loop_bw, "Time: BW", "slider", float)
self.top_grid_layout.addWidget(self._timing_loop_bw_win, 3,1,1,1)
self._time_offset_range = Range(0.999, 1.001, 0.0001, 1.00, 200)
self._time_offset_win = RangeWidget(self._time_offset_range, self.set_time_offset, "Channel: Timing Offset", "slider", float)
self.top_grid_layout.addWidget(self._time_offset_win, 3,0,1,1)
self._phase_bw_range = Range(0.0, 1.0, 0.01, 6.28/100.0, 200)
self._phase_bw_win = RangeWidget(self._phase_bw_range, self.set_phase_bw, "Phase: Bandwidth", "slider", float)
self.top_grid_layout.addWidget(self._phase_bw_win, 4,1,1,1)
self._noise_volt_range = Range(0, 1, 0.01, 0.001, 200)
self._noise_volt_win = RangeWidget(self._noise_volt_range, self.set_noise_volt, "Channel: Noise Voltage", "slider", float)
self.top_grid_layout.addWidget(self._noise_volt_win, 2,0,1,1)
self._freq_offset_range = Range(-0.1, 0.1, 0.001, 0, 200)
self._freq_offset_win = RangeWidget(self._freq_offset_range, self.set_freq_offset, "Channel: Frequency Offset", "slider", float)
self.top_grid_layout.addWidget(self._freq_offset_win, 2,1,1,1)
self._eq_gain_range = Range(0.0, 0.1, 0.001, 0.01, 200)
self._eq_gain_win = RangeWidget(self._eq_gain_range, self.set_eq_gain, "Equalizer: rate", "slider", float)
self.top_grid_layout.addWidget(self._eq_gain_win, 4,0,1,1)
self.snr_mpsk_receiver_snr_est_cc_0 = snr.mpsk_receiver_snr_est_cc(10000, 0.001)
self.snr_channel_model_snr_0 = snr.channel_model_snr(
noise_voltage=noise_volt,
frequency_offset=freq_offset,
epsilon=time_offset,
taps=(taps),
noise_seed=0,
block_tags=False
)
self.qtgui_time_sink_x_0 = qtgui.time_sink_f(
4000, #size
samp_rate, #samp_rate
"QT GUI Plot", #name
1 #number of inputs
)
self.qtgui_time_sink_x_0.set_update_time(0.01)
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(-1, 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_control_panel(False)
if not True:
self.qtgui_time_sink_x_0.disable_legend()
labels = ["", "", "", "", "",
"", "", "", "", ""]
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "blue"]
styles = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
markers = [-1, -1, -1, -1, -1,
-1, -1, -1, -1, -1]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in xrange(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, 0,0,1,1)
self.qtgui_const_sink_x_0 = qtgui.const_sink_c(
1024, #size
"QT GUI Plot", #name
1 #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)
if not True:
self.qtgui_const_sink_x_0.disable_legend()
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 xrange(1):
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, 0,1,1,1)
self.digital_psk_mod_0 = digital.psk.psk_mod(
constellation_points=arity,
mod_code="gray",
differential=True,
samples_per_symbol=sps,
excess_bw=0.35,
verbose=False,
log=False,
)
self.digital_pfb_clock_sync_xxx_0 = digital.pfb_clock_sync_ccf(sps, timing_loop_bw, (rrc_taps), nfilts, nfilts/2, 1.5, 2)
self.digital_costas_loop_cc_0 = digital.costas_loop_cc(phase_bw, arity, False)
self.digital_cma_equalizer_cc_0 = digital.cma_equalizer_cc(15, 1, eq_gain, 2)
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
self.blocks_multiply_const_vxx_0 = blocks.multiply_const_vcc((1+1j, ))
self.blocks_message_debug_0 = blocks.message_debug()
self.analog_random_source_x_0 = blocks.vector_source_b(map(int, numpy.random.randint(0, 256, 10000)), True)
##################################################
# Connections
##################################################
self.msg_connect((self.snr_channel_model_snr_0, 'snr_level_out'), (self.snr_mpsk_receiver_snr_est_cc_0, 'snr_level_in'))
self.connect((self.analog_random_source_x_0, 0), (self.digital_psk_mod_0, 0))
self.connect((self.blocks_multiply_const_vxx_0, 0), (self.blocks_throttle_0, 0))
self.connect((self.blocks_throttle_0, 0), (self.snr_channel_model_snr_0, 0))
self.connect((self.digital_cma_equalizer_cc_0, 0), (self.digital_costas_loop_cc_0, 0))
self.connect((self.digital_costas_loop_cc_0, 0), (self.qtgui_const_sink_x_0, 0))
self.connect((self.digital_costas_loop_cc_0, 1), (self.qtgui_time_sink_x_0, 0))
self.connect((self.digital_pfb_clock_sync_xxx_0, 0), (self.digital_cma_equalizer_cc_0, 0))
self.connect((self.digital_psk_mod_0, 0), (self.blocks_multiply_const_vxx_0, 0))
self.connect((self.snr_channel_model_snr_0, 0), (self.snr_mpsk_receiver_snr_est_cc_0, 0))
self.connect((self.snr_mpsk_receiver_snr_est_cc_0, 0), (self.digital_pfb_clock_sync_xxx_0, 0))