def __init__(self, modulator_class, options):
'''
See below for what options should hold
'''
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
options = copy.copy(
options) # make a copy so we can destructively modify
self._verbose = options.verbose
self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
self._bitrate = options.bitrate # desired bit rate
self._mod_class = modulator_class # the modulator_class we are using
# Get mod_kwargs
mod_kwargs = self._mod_class.extract_kwargs_from_options(options)
# Transmitter
self.modulator = self._mod_class(**mod_kwargs)
self.packet_transmitter = digital.mod_pkts(self.modulator,
access_code=None,
msgq_limit=4)
self.amp = blocks.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
# Display some information about the setup
#if self._verbose:
# self._print_verbage()
# Connect components in the flowgraph
self.connect(self.packet_transmitter, self.amp, self)
def __init__(self):
gr.top_block.__init__(self)
## Modulator
self.modulator = digital.qpsk_mod(mod_code="gray",
differential=True,
samples_per_symbol=4,
excess_bw=0.35,
verbose=False,
log=False)
## USRP Sink
self.u = uhd.usrp_sink(device_addr="",
stream_args=uhd.stream_args('fc32'))
self.u.set_samp_rate(500e3)
self.u.set_center_freq(5.04e9, 0)
self.u.set_gain(35, 0)
self.u.set_antenna("TX/RX", 0)
## Packet Transmitter
self.packet_transmitter = digital.mod_pkts(self.modulator,
access_code=None,
msgq_limit=4,
pad_for_usrp=True)
## Connects
self.connect(self.packet_transmitter, self.u)
def __init__(self, modulator_class, options):
'''
See below for what options should hold
'''
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0,0,0),
gr.io_signature(1,1,gr.sizeof_gr_complex))
options = copy.copy(options) # make a copy so we can destructively modify
self._verbose = options.verbose
self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
self._bitrate = options.bitrate # desired bit rate
self._modulator_class = modulator_class # the modulator_class we are using
# Get mod_kwargs
mod_kwargs = self._modulator_class.extract_kwargs_from_options(options)
# transmitter
self.modulator = self._modulator_class(**mod_kwargs)
self.packet_transmitter = \
digital.mod_pkts(self.modulator,
access_code=None,
msgq_limit=4,
pad_for_usrp=True)
self.amp = gr.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
# Display some information about the setup
if self._verbose:
self._print_verbage()
# Connect components in the flowgraph
self.connect(self.packet_transmitter, self.amp, self)
def __init__(self, modulator_class, options):
'''
See below for what options should hold
'''
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0,0,0),
gr.io_signature(1,1,gr.sizeof_gr_complex))
options = copy.copy(options) # make a copy so we can destructively modify
self._verbose = options.verbose
self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
self._bitrate = options.bitrate # desired bit rate
self._modulator_class = modulator_class # the modulator_class we are using
# Get mod_kwargs
mod_kwargs = self._modulator_class.extract_kwargs_from_options(options)
# transmitter
self.modulator = self._modulator_class(**mod_kwargs)
self.packet_transmitter = \
digital.mod_pkts(self.modulator,
access_code=None,
msgq_limit=4,
pad_for_usrp=True)
self.amp = gr.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
# Figure out how to calculate symbol_rate later
symbol_rate = 5000000
# Hardcoding rx_freq and rx_gain
self.source = uhd_receiver(options.args, symbol_rate,
options.samples_per_symbol,
options.tx_freq-1250000, 30,
options.spec, options.antenna,
options.verbose)
options.samples_per_symbol = self.source._sps
# Display some information about the setup
if self._verbose:
self._print_verbage()
low_pass_taps = [
-0.0401,
0.0663,
0.0468,
-0.0235,
-0.0222,
0.0572,
0.0299,
-0.1001,
-0.0294,
0.3166,
0.5302,
0.3166,
-0.0294,
-0.1001,
0.0299,
0.0572,
-0.0222,
-0.0235,
0.0468,
0.0663,
-0.0401]
high_pass_taps = [
-0.0389,
-0.0026,
0.0302,
0.0181,
-0.0357,
-0.0394,
0.0450,
0.0923,
-0.0472,
-0.3119,
0.5512,
-0.3119,
-0.0472,
0.0923,
0.0450,
-0.0394,
-0.0357,
0.0181,
0.0302,
-0.0026,
-0.0389]
# Carrier Sensing Blocks
alpha = 0.001
thresh = 30 # in dB, will have to adjust
self.probe_lp = gr.probe_avg_mag_sqrd_c(thresh,alpha)
self.probe_hp = gr.probe_avg_mag_sqrd_c(thresh,alpha)
self.lp = gr.fft_filter_ccc(65536, low_pass_taps)
self.hp = gr.fft_filter_ccc(65536, high_pass_taps)
self.connect(self.source, self.lp)
self.connect(self.lp, self.probe_lp)
self.connect(self.source, self.hp)
self.connect(self.hp, self.probe_hp)
# Connect components in the flowgraph
self.connect(self.packet_transmitter, self.amp, self)
