3 # Copyright 2007 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 2, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
24 from gnuradio import gr
26 class ofdm_sync_fixed(gr.hier_block):
27 def __init__(self, fg, fft_length, cp_length, snr):
30 # Use a fixed trigger point instead of sync block
31 data = (fft_length+cp_len)*[0,]
32 data[(fft_length+cp_len)-1] = 1
33 peak_trigger = gr.vector_source_b(data, True)
35 self.fg.connect(peak_trigger, (self.sampler,1))
38 self.fg.connect(self.sampler, gr.file_sink(gr.sizeof_gr_complex*fft_length,
39 "ofdm_sync_fixed-sampler_c.dat"))
41 gr.hier_block.__init__(self, fg, (self.sampler,0), self.sampler)