def __init__(self, channels, decim, ch_width, ch_twidth, fc, band,
samp_rate, path):
gr.top_block.__init__(self, "gsm_channelize")
##################################################
# Parameters
##################################################
self.channels = channels
self.decim = decim
self.ch_width = ch_width
self.ch_twidth = ch_twidth
self.fc = fc
self.band = band
self.samp_rate = samp_rate
self.blocks_fir_filters = {}
self.blocks_file_sinks = {}
##################################################
# Blocks and connections
##################################################
self.blocks_file_source = blocks.file_source(gr.sizeof_gr_complex,
path, False)
self.blocks_throttle = blocks.throttle(gr.sizeof_gr_complex, samp_rate,
True)
self.connect((self.blocks_file_source, 0), (self.blocks_throttle, 0))
c0_arfcn = arfcn.downlink2arfcn(fc, band)
self.channels.insert(0, c0_arfcn)
print(
"Extracting channels %s, given that the center frequency is at ARFCN %d (%s)"
% (str(channels), c0_arfcn, eng_notation.num_to_str(fc)))
for channel in channels:
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_fir_filters[
channel] = filter.freq_xlating_fir_filter_ccc(
decim,
(firdes.low_pass(1, samp_rate, ch_width, ch_twidth)),
freq_diff, samp_rate)
self.connect((self.blocks_throttle, 0),
(self.blocks_fir_filters[channel], 0))
self.blocks_file_sinks[channel] = blocks.file_sink(
gr.sizeof_gr_complex,
"./gsm_channelizer/out_" + str(channel) + ".cfile", False)
self.blocks_file_sinks[channel].set_unbuffered(False)
self.connect((self.blocks_fir_filters[channel], 0),
(self.blocks_file_sinks[channel], 0))
def __init__(self, channels, decim, ch_width, ch_twidth, fc, band, samp_rate, path):
gr.top_block.__init__(self, "gsm_channelize")
##################################################
# Parameters
##################################################
self.channels = channels
self.decim = decim
self.ch_width = ch_width
self.ch_twidth = ch_twidth
self.fc = fc
self.band = band
self.samp_rate = samp_rate
self.blocks_fir_filters = {}
self.blocks_file_sinks = {}
##################################################
# Blocks and connections
##################################################
self.blocks_file_source = blocks.file_source(gr.sizeof_gr_complex, path, False)
self.blocks_throttle = blocks.throttle(gr.sizeof_gr_complex, samp_rate,True)
self.connect((self.blocks_file_source, 0), (self.blocks_throttle, 0))
c0_arfcn = arfcn.downlink2arfcn(fc, band)
self.channels.insert(0, c0_arfcn)
print("Extracting channels %s, given that the center frequency is at ARFCN %d (%s)" % (str(channels), c0_arfcn, eng_notation.num_to_str(fc)))
for channel in channels:
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_fir_filters[channel] = filter.freq_xlating_fir_filter_ccc(decim, (firdes.low_pass(1, samp_rate, ch_width, ch_twidth)), freq_diff, samp_rate)
self.connect((self.blocks_throttle, 0), (self.blocks_fir_filters[channel], 0))
self.blocks_file_sinks[channel] = blocks.file_sink(gr.sizeof_gr_complex, "./gsm_channelizer/out_" + str(channel) + ".cfile", False)
self.blocks_file_sinks[channel].set_unbuffered(False)
self.connect((self.blocks_fir_filters[channel], 0), (self.blocks_file_sinks[channel], 0))
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")