<?xml version="1.0"?> <!-- Copyright 2011 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 Frame Acquisition ################################################### --> <block> <name>OFDM Frame Acquisition</name> <key>digital_ofdm_frame_acquisition</key> <import>from gnuradio import digital</import> <make>digital.ofdm_frame_acquisition($occupied_carriers, $fft_length, $cplen, $known_symbol, $max_fft_shift_len)</make> <param> <name>Occupied Carriers</name> <key>occupied_carriers</key> <type>int</type> </param> <param> <name>FFT Length</name> <key>fft_length</key> <type>int</type> </param> <param> <name>CP Length</name> <key>cplen</key> <type>int</type> </param> <param> <name>Preamble</name> <key>known_symbol</key> <type>complex_vector</type> </param> <param> <name>Max FFT Shift</name> <key>max_fft_shift_len</key> <type>int</type> </param> <sink> <name>in</name> <type>complex</type> <vlen>$fft_length</vlen> </sink> <sink> <name>flag</name> <type>byte</type> <vlen>$fft_length</vlen> </sink> <source> <name>out</name> <type>complex</type> <vlen>$occupied_carriers</vlen> </source> <source> <name>flag</name> <type>byte</type> </source> </block>