diff options
Diffstat (limited to 'gr-digital/python/digital/ofdm_txrx.py')
| -rw-r--r-- | gr-digital/python/digital/ofdm_txrx.py | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/gr-digital/python/digital/ofdm_txrx.py b/gr-digital/python/digital/ofdm_txrx.py index b04c42cbfa..1c3bcc34e4 100644 --- a/gr-digital/python/digital/ofdm_txrx.py +++ b/gr-digital/python/digital/ofdm_txrx.py @@ -1,23 +1,23 @@ # # Copyright 2013 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. -# +# """ OFDM Transmitter / Receiver hier blocks. @@ -116,7 +116,7 @@ def _get_constellation(bps): exit(1) class ofdm_tx(gr.hier_block2): - """ Hierarchical block for OFDM modulation. + """Hierarchical block for OFDM modulation. The input is a byte stream (unsigned char) and the output is the complex modulated signal at baseband. @@ -130,13 +130,16 @@ class ofdm_tx(gr.hier_block2): pilot_symbols: The pilot symbols. bps_header: Bits per symbol (header). bps_payload: Bits per symbol (payload). - sync_word1: The first sync preamble symbol. This has to be with zeros on alternating carriers. - Used for fine and coarse frequency offset and timing estimation. - sync_word2: The second sync preamble symbol. This has to be filled entirely. Also used for - coarse frequency offset and channel estimation. + sync_word1: The first sync preamble symbol. This has to be with + | zeros on alternating carriers. Used for fine and + | coarse frequency offset and timing estimation. + sync_word2: The second sync preamble symbol. This has to be filled + | entirely. Also used for coarse frequency offset and + | channel estimation. rolloff: The rolloff length in samples. Must be smaller than the CP. debug_log: Write output into log files (Warning: creates lots of data!) scramble_bits: Activates the scramblers (set this to True unless debugging) + """ def __init__(self, fft_len=_def_fft_len, cp_len=_def_cp_len, packet_length_tag_key=_def_packet_length_tag_key, @@ -259,7 +262,7 @@ class ofdm_tx(gr.hier_block2): class ofdm_rx(gr.hier_block2): - """ Hierarchical block for OFDM demodulation. + """Hierarchical block for OFDM demodulation. The input is a complex baseband signal (e.g. from a UHD source). The detected packets are output as a stream of packed bits on the output. @@ -274,10 +277,12 @@ class ofdm_rx(gr.hier_block2): pilot_symbols: The pilot symbols. bps_header: Bits per symbol (header). bps_payload: Bits per symbol (payload). - sync_word1: The first sync preamble symbol. This has to be with zeros on alternating carriers. - Used for fine and coarse frequency offset and timing estimation. - sync_word2: The second sync preamble symbol. This has to be filled entirely. Also used for - coarse frequency offset and channel estimation. + sync_word1: The first sync preamble symbol. This has to be with + | zeros on alternating carriers. Used for fine and + | coarse frequency offset and timing estimation. + sync_word2: The second sync preamble symbol. This has to be filled + | entirely. Also used for coarse frequency offset and + | channel estimation. """ def __init__(self, fft_len=_def_fft_len, cp_len=_def_cp_len, frame_length_tag_key=_def_frame_length_tag_key, @@ -371,7 +376,7 @@ class ofdm_rx(gr.hier_block2): occupied_carriers, 1, packet_length_tag_key, frame_length_tag_key, - packet_num_tag_key, + packet_nu_tag_key, bps_header, bps_payload, scramble_header=scramble_bits @@ -447,5 +452,3 @@ class ofdm_rx(gr.hier_block2): self.connect(payload_demod, blocks.file_sink(1, 'post-payload-demod.dat')) self.connect(payload_pack, blocks.file_sink(1, 'post-payload-pack.dat')) self.connect(crc, blocks.file_sink(1, 'post-payload-crc.dat')) - - |