From a7c7cf1186ec73786e6bbefb430c940c8747f857 Mon Sep 17 00:00:00 2001 From: Ben Reynwar <ben@reynwar.net> Date: Thu, 7 Mar 2013 23:11:20 -0700 Subject: digital: Enabling uninstalled python imports. --- gr-digital/python/digital/ofdm_sync_fixed.py | 50 ++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 gr-digital/python/digital/ofdm_sync_fixed.py (limited to 'gr-digital/python/digital/ofdm_sync_fixed.py') diff --git a/gr-digital/python/digital/ofdm_sync_fixed.py b/gr-digital/python/digital/ofdm_sync_fixed.py new file mode 100644 index 0000000000..9bac789bf6 --- /dev/null +++ b/gr-digital/python/digital/ofdm_sync_fixed.py @@ -0,0 +1,50 @@ +#!/usr/bin/env python +# +# Copyright 2007 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. +# + +import math +from gnuradio import gr + +class ofdm_sync_fixed(gr.hier_block2): + def __init__(self, fft_length, cp_length, nsymbols, freq_offset, logging=False): + + gr.hier_block2.__init__(self, "ofdm_sync_fixed", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature2(2, 2, gr.sizeof_float, gr.sizeof_char)) # Output signature + + # Use a fixed trigger point instead of sync block + symbol_length = fft_length + cp_length + pkt_length = nsymbols*symbol_length + data = (pkt_length)*[0,] + data[(symbol_length)-1] = 1 + self.peak_trigger = gr.vector_source_b(data, True) + + # Use a pre-defined frequency offset + foffset = (pkt_length)*[math.pi*freq_offset,] + self.frequency_offset = gr.vector_source_f(foffset, True) + + self.connect(self, gr.null_sink(gr.sizeof_gr_complex)) + self.connect(self.frequency_offset, (self,0)) + self.connect(self.peak_trigger, (self,1)) + + if logging: + self.connect(self.peak_trigger, gr.file_sink(gr.sizeof_char, "ofdm_sync_fixed-peaks_b.dat")) + -- cgit v1.2.3