def __init__(self, ppm=0, osr=4, fc=940e6, samp_rate_in=1e6):
grgsm.hier_block.__init__(
self,
"GSM input adaptor",
gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
)
##################################################
# Parameters
##################################################
self.ppm = ppm
self.osr = osr
self.fc = fc
self.samp_rate_in = samp_rate_in
##################################################
# Variables
##################################################
self.samp_rate_out = samp_rate_out = 1625000.0 / 6.0 * osr
##################################################
# Blocks
##################################################
if version(gr.version()) >= version('3.7.9'):
self.message_port_register_hier_in("ppm_in")
else:
self.message_port_register_hier_out("ppm_in")
self.low_pass_filter_0_0 = filter.fir_filter_ccf(
1,
firdes.low_pass(1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING,
6.76))
self.gsm_clock_offset_corrector_0 = grgsm.clock_offset_corrector(
fc=fc,
ppm=ppm,
samp_rate_in=samp_rate_in,
)
self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(
0, samp_rate_in / samp_rate_out)
##################################################
# Connections
##################################################
self.connect((self.low_pass_filter_0_0, 0), (self, 0))
self.connect((self.fractional_resampler_xx_0, 0),
(self.low_pass_filter_0_0, 0))
self.connect((self.gsm_clock_offset_corrector_0, 0),
(self.fractional_resampler_xx_0, 0))
self.connect((self, 0), (self.gsm_clock_offset_corrector_0, 0))
##################################################
# Asynch Message Connections
##################################################
self.msg_connect(self, "ppm_in", self.gsm_clock_offset_corrector_0,
"ppm_in")
def __init__(self, ppm=0, osr=4, fc=940e6, samp_rate_in=1e6):
gr.hier_block2.__init__(
self, "GSM input adaptor",
gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
)
##################################################
# Parameters
##################################################
self.ppm = ppm
self.osr = osr
self.fc = fc
self.samp_rate_in = samp_rate_in
##################################################
# Variables
##################################################
self.samp_rate_out = samp_rate_out = 1625000.0/6.0*osr
##################################################
# Blocks
##################################################
if version(gr.version()) >= version('3.7.9'):
self.message_port_register_hier_in("ppm_in")
else:
self.message_port_register_hier_out("ppm_in")
self.low_pass_filter_0_0 = filter.fir_filter_ccf(1, firdes.low_pass(
1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76))
self.gsm_clock_offset_corrector_0 = grgsm.clock_offset_corrector(
fc=fc,
ppm=ppm,
samp_rate_in=samp_rate_in,
)
self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(0, samp_rate_in/samp_rate_out)
##################################################
# Connections
##################################################
self.connect((self.low_pass_filter_0_0, 0), (self, 0))
self.connect((self.fractional_resampler_xx_0, 0), (self.low_pass_filter_0_0, 0))
self.connect((self.gsm_clock_offset_corrector_0, 0), (self.fractional_resampler_xx_0, 0))
self.connect((self, 0), (self.gsm_clock_offset_corrector_0, 0))
##################################################
# Asynch Message Connections
##################################################
self.msg_connect(self, "ppm_in", self.gsm_clock_offset_corrector_0, "ppm_in")
def __init__(self,
ppm=0,
osr=4,
fc=925.2e6,
samp_rate_in=20e6,
ca=[],
band='P-GSM'):
self.num_streams = len(ca)
grgsm.hier_block.__init__(
self,
"GSM wideband input adaptor",
gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
gr.io_signature(self.num_streams, self.num_streams,
gr.sizeof_gr_complex * 1),
)
##################################################
# Parameters
##################################################
self.ppm = ppm
self.osr = osr
self.fc = fc
self.samp_rate_in = samp_rate_in
self.ca = ca
self.blocks_fir_filters = {}
self.blocks_resamplers = {}
self.blocks_ocs = {}
self.band = band
##################################################
# Variables
##################################################
self.samp_rate_out = samp_rate_out = 1625000.0 / 6.0 * osr
##################################################
# Blocks
##################################################
self.ppm_in = None
self.message_port_register_hier_in("ppm_in")
#self.lpf = firdes.low_pass(1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76)
self.lpf = firdes.low_pass(1, samp_rate_in, 125e3, 75e3,
firdes.WIN_HAMMING, 6.76)
self.gsm_clock_offset_corrector_0 = grgsm.clock_offset_corrector(
fc=fc,
ppm=ppm,
samp_rate_in=samp_rate_in,
)
center_arfcn = arfcn.downlink2arfcn(fc, band)
fc_str = eng_notation.num_to_str(fc)
print(
"Extracting channels %s, given center frequency at %sHz (ARFCN %d)"
% (str(ca), fc_str, center_arfcn))
self.connect((self, 0), (self.gsm_clock_offset_corrector_0, 0))
output_port = 0
for channel in ca:
channel_freq = arfcn.arfcn2downlink(channel, band)
if channel_freq is None:
print("Warning: invalid ARFCN %d for band %s" %
(channel, band))
continue
freq_diff = channel_freq - fc
freq_diff_str = "+" if 0 <= freq_diff else ""
freq_diff_str += eng_notation.num_to_str(freq_diff)
print("ARFCN %d is at %sHz %sHz" %
(channel, fc_str, freq_diff_str))
self.blocks_resamplers[channel] = filter.fractional_resampler_cc(
0, samp_rate_in / samp_rate_out)
self.blocks_fir_filters[
channel] = filter.freq_xlating_fir_filter_ccc(
1, self.lpf, freq_diff, samp_rate_in)
self.connect((self.gsm_clock_offset_corrector_0, 0),
(self.blocks_fir_filters[channel], 0))
self.connect((self.blocks_fir_filters[channel], 0),
(self.blocks_resamplers[channel], 0))
self.connect((self.blocks_resamplers[channel], 0),
(self, output_port))
output_port += 1
##################################################
# Asynch Message Connections
##################################################
self.msg_connect(self, "ppm_in", self.gsm_clock_offset_corrector_0,
"ppm_in")
def __init__(self, ppm=0, osr=4, fc=925.2e6, samp_rate_in=20e6, ca=[]):
self.num_streams = len(ca)
gr.hier_block2.__init__(
self, "GSM wideband input adaptor",
gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
gr.io_signature(self.num_streams, self.num_streams, gr.sizeof_gr_complex*1),
)
##################################################
# Parameters
##################################################
self.ppm = ppm
self.osr = osr
self.fc = fc
self.samp_rate_in = samp_rate_in
self.ca = ca
self.blocks_fir_filters = {}
self.blocks_resamplers = {}
self.blocks_ocs = {}
self.band = band = 'E-GSM' # TODO make selectable
##################################################
# Variables
##################################################
self.samp_rate_out = samp_rate_out = 1625000.0/6.0*osr
##################################################
# Blocks
##################################################
self.ppm_in = None
self.message_port_register_hier_out("ppm_in")
#self.lpf = firdes.low_pass(1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76)
self.lpf = firdes.low_pass(1, samp_rate_in, 125e3, 75e3, firdes.WIN_HAMMING, 6.76)
self.gsm_clock_offset_corrector_0 = grgsm.clock_offset_corrector(
fc=fc,
ppm=ppm,
samp_rate_in=samp_rate_in,
)
c0_arfcn = arfcn.downlink2arfcn(fc, band)
print("Extracting channels %s, given that the center frequency is at ARFCN %d (%s)" % (str(ca), c0_arfcn, eng_notation.num_to_str(fc)))
self.connect((self, 0), (self.gsm_clock_offset_corrector_0, 0))
output_port = 0
for channel in ca:
channel_freq = arfcn.arfcn2downlink(channel, band)
if channel_freq is None:
print("Warning: invalid ARFCN %d for band %s" % (channel, band))
continue
freq_diff = channel_freq - fc
print("ARFCN %d is at C0 %+d KHz" % (channel, int(freq_diff / 1000.0)))
self.blocks_resamplers[channel] = filter.fractional_resampler_cc(0, samp_rate_in/samp_rate_out)
self.blocks_fir_filters[channel] = filter.freq_xlating_fir_filter_ccc(1, self.lpf, freq_diff, samp_rate_in)
self.connect((self.gsm_clock_offset_corrector_0, 0), (self.blocks_fir_filters[channel], 0))
self.connect((self.blocks_fir_filters[channel], 0), (self.blocks_resamplers[channel], 0))
self.connect((self.blocks_resamplers[channel], 0), (self, output_port))
output_port += 1
##################################################
# Asynch Message Connections
##################################################
self.msg_connect(self, "ppm_in", self.gsm_clock_offset_corrector_0, "ppm_in")
