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Diffstat (limited to 'gnuradio-examples/python/digital-bert/transmit_path.py')
| -rw-r--r-- | gnuradio-examples/python/digital-bert/transmit_path.py | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/gnuradio-examples/python/digital-bert/transmit_path.py b/gnuradio-examples/python/digital-bert/transmit_path.py deleted file mode 100644 index 96834b398..000000000 --- a/gnuradio-examples/python/digital-bert/transmit_path.py +++ /dev/null @@ -1,61 +0,0 @@ -# -# Copyright 2008 Free Software Foundation, Inc. -# -# This file is part of GNU Radio -# -# GNU Radio is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3, or (at your option) -# any later version. -# -# GNU Radio is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with GNU Radio; see the file COPYING. If not, write to -# the Free Software Foundation, Inc., 51 Franklin Street, -# Boston, MA 02110-1301, USA. -# - -from gnuradio import gr -from math import pi, log10 -import cmath - -class transmit_path(gr.hier_block2): - """ - This transmits a BERT sequence of bits using filtered BPSK and - outputs the complex baseband waveform. - """ - def __init__(self, - sps, # Samples per symbol - excess_bw, # RRC filter excess bandwidth (typically 0.35-0.5) - amplitude # DAC output level, 0-32767, typically 2000-8000 - ): - - gr.hier_block2.__init__(self, "transmit_path", - gr.io_signature(0, 0, 0), # Input signature - gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature - - # Create BERT data bit stream - self._bits = gr.vector_source_b([1,], True) # Infinite stream of ones - self._scrambler = gr.scrambler_bb(0x8A, 0x7F, 7) # CCSDS 7-bit scrambler - - # Map to constellation - self._constellation = [-1+0j, 1+0j] - self._mapper = gr.chunks_to_symbols_bc(self._constellation) - - # Create RRC with specified excess bandwidth - taps = gr.firdes.root_raised_cosine(sps*amplitude, # Gain - sps, # Sampling rate - 1.0, # Symbol rate - excess_bw, # Roll-off factor - 11*sps) # Number of taps - - self._rrc = gr.interp_fir_filter_ccf(sps, # Interpolation rate - taps) # FIR taps - - # Wire block inputs and outputs - self.connect(self._bits, self._scrambler, self._mapper, self._rrc, self) - |