def __init__(self, options):
"""
@param options: parsed raw.ofdm_params
"""
self.params = ofdm_params(options)
params = self.params
gr.hier_block2.__init__(
self,
"ofdm_mod",
gr.io_signature2(2, 2, gr.sizeof_gr_complex * params.data_tones,
gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
win = [] #[1 for i in range(self._fft_length)]
# see gr_fft_vcc_fftw that it works differently if win = [1 1 1 ...]
self.mapper = raw.ofdm_mapper(params.padded_carriers)
self.preambles = digital.ofdm_insert_preamble(params.fft_length,
params.padded_preambles)
self.ifft = gr.fft_vcc(params.fft_length, False, win, True)
self.cp_adder = digital.ofdm_cyclic_prefixer(
params.fft_length, params.fft_length + params.cp_length)
self.scale = gr.multiply_const_cc(1.0 / math.sqrt(params.fft_length))
self.connect((self, 0), self.mapper, (self.preambles, 0))
self.connect((self, 1), (self.preambles, 1))
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale,
self)
if options.log:
self.connect(
self.mapper,
gr.file_sink(gr.sizeof_gr_complex * params.fft_length,
"tx-map.dat"))
self.connect(
self.preambles,
gr.file_sink(gr.sizeof_gr_complex * params.fft_length,
"tx-pre.dat"))
self.connect(
self.ifft,
gr.file_sink(gr.sizeof_gr_complex * params.fft_length,
"tx-ifft.dat"))
self.connect(self.cp_adder,
gr.file_sink(gr.sizeof_gr_complex, "tx-cp.dat"))
def __init__(self, options):
"""
@param options: parsed raw.ofdm_params
"""
self.params = ofdm_params(options)
params = self.params
gr.hier_block2.__init__(self, "ofdm_mod",
gr.io_signature2(2, 2, gr.sizeof_gr_complex*params.data_tones, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
win = [] #[1 for i in range(self._fft_length)]
# see gr_fft_vcc_fftw that it works differently if win = [1 1 1 ...]
self.mapper = raw.ofdm_mapper(params.padded_carriers)
self.preambles = digital.ofdm_insert_preamble(params.fft_length, params.padded_preambles)
self.ifft = gr.fft_vcc(params.fft_length, False, win, True)
self.cp_adder = digital.ofdm_cyclic_prefixer(params.fft_length, params.fft_length + params.cp_length)
self.scale = gr.multiply_const_cc(1.0 / math.sqrt(params.fft_length))
self.connect((self,0), self.mapper, (self.preambles,0))
self.connect((self,1), (self.preambles,1))
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
if options.log:
self.connect(self.mapper,
gr.file_sink(gr.sizeof_gr_complex*params.fft_length,
"tx-map.dat"))
self.connect(self.preambles,
gr.file_sink(gr.sizeof_gr_complex*params.fft_length,
"tx-pre.dat"))
self.connect(self.ifft,
gr.file_sink(gr.sizeof_gr_complex*params.fft_length,
"tx-ifft.dat"))
self.connect(self.cp_adder,
gr.file_sink(gr.sizeof_gr_complex,
"tx-cp.dat"))
def __init__(self, options, noutputs=2):
"""
@param options: parsed raw.ofdm_params
"""
self.params = ofdm_params(options)
params = self.params
if noutputs == 2:
output_signature = gr.io_signature2(
2, 2, gr.sizeof_gr_complex * params.data_tones, gr.sizeof_char)
elif noutputs == 3:
output_signature = gr.io_signature3(
3, 3, gr.sizeof_gr_complex * params.data_tones, gr.sizeof_char,
gr.sizeof_float)
elif noutputs == 4:
output_signature = gr.io_signature4(
4, 4, gr.sizeof_gr_complex * params.data_tones, gr.sizeof_char,
gr.sizeof_float, gr.sizeof_float)
else:
# error
raise Exception("unsupported number of outputs")
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
output_signature)
self.ofdm_recv = ofdm_receiver(params, options.log)
# FIXME: magic parameters
phgain = 0.4
frgain = phgain * phgain / 4.0
eqgain = 0.05
self.ofdm_demod = raw.ofdm_demapper(params.carriers, phgain, frgain,
eqgain)
# the studios can't handle the whole ofdm in one thread
#ofdm_recv = raw.wrap_sts(self.ofdm_recv)
ofdm_recv = self.ofdm_recv
self.connect(self, ofdm_recv)
self.connect((ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((ofdm_recv, 1), (self.ofdm_demod, 1))
self.connect(self.ofdm_demod, (self, 0))
self.connect((ofdm_recv, 1), (self, 1))
if noutputs > 2:
# average noise power per (pilot) subcarrier
self.connect((self.ofdm_demod, 1), (self, 2))
if noutputs > 3:
# average signal power per subcarrier
self.connect(
(ofdm_recv, 0),
gr.vector_to_stream(gr.sizeof_float, params.occupied_tones),
gr.integrate_ff(params.occupied_tones),
gr.multiply_ff(1.0 / params.occupied_tones), (self, 3))
if options.log:
self.connect(
(self.ofdm_demod, 2),
gr.file_sink(gr.sizeof_gr_complex * params.occupied_tones,
'rx-eq.dat'))
self.connect((self.ofdm_demod, 1),
gr.file_sink(gr.sizeof_float, 'rx-noise.dat'))
self.connect((self.ofdm_demod, 0),
gr.file_sink(gr.sizeof_gr_complex * params.data_tones,
'rx-demap.dat'))
def __init__(self, options, noutputs = 2):
"""
@param options: parsed raw.ofdm_params
"""
self.params = ofdm_params(options)
params = self.params
if noutputs == 2:
output_signature = gr.io_signature2(2, 2,
gr.sizeof_gr_complex*params.data_tones,
gr.sizeof_char
)
elif noutputs == 3:
output_signature = gr.io_signature3(3, 3,
gr.sizeof_gr_complex*params.data_tones,
gr.sizeof_char,
gr.sizeof_float
)
elif noutputs == 4:
output_signature = gr.io_signature4(4, 4,
gr.sizeof_gr_complex*params.data_tones,
gr.sizeof_char,
gr.sizeof_float,
gr.sizeof_float
)
else:
# error
raise Exception("unsupported number of outputs")
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex),
output_signature
)
self.ofdm_recv = ofdm_receiver(params, options.log)
# FIXME: magic parameters
phgain = 0.4
frgain = phgain*phgain / 4.0
eqgain = 0.05
self.ofdm_demod = raw.ofdm_demapper(params.carriers,
phgain, frgain, eqgain)
# the studios can't handle the whole ofdm in one thread
#ofdm_recv = raw.wrap_sts(self.ofdm_recv)
ofdm_recv = self.ofdm_recv
self.connect(self, ofdm_recv)
self.connect((ofdm_recv,0), (self.ofdm_demod,0))
self.connect((ofdm_recv,1), (self.ofdm_demod,1))
self.connect(self.ofdm_demod, (self,0))
self.connect((ofdm_recv,1), (self,1))
if noutputs > 2:
# average noise power per (pilot) subcarrier
self.connect((self.ofdm_demod,1), (self,2))
if noutputs > 3:
# average signal power per subcarrier
self.connect((ofdm_recv,0),
gr.vector_to_stream(gr.sizeof_float, params.occupied_tones),
gr.integrate_ff(params.occupied_tones),
gr.multiply_ff(1.0/params.occupied_tones), (self,3))
if options.log:
self.connect((self.ofdm_demod, 2),
gr.file_sink(gr.sizeof_gr_complex*params.occupied_tones,
'rx-eq.dat'))
self.connect((self.ofdm_demod, 1),
gr.file_sink(gr.sizeof_float,
'rx-noise.dat'))
self.connect((self.ofdm_demod, 0),
gr.file_sink(gr.sizeof_gr_complex*params.data_tones,
'rx-demap.dat'))
