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/* -*- c++ -*- */
/*
* Copyright 2002 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.
*/
#include <atsc_consts.h>
#include <atsci_root_raised_cosine.h>
#include <gr_firdes.h>
vector<float>
atsc_root_raised_cosine::taps (double sampling_rate)
{
static const double symbol_rate = ATSC_SYMBOL_RATE/2; // 1/2 as wide because we're designing lp filter
// static const int NTAPS = 93; // good number
// static const int NTAPS = 745; // better number
static const int NTAPS = 279; // better number
return gr_firdes::root_raised_cosine (1.0, sampling_rate, symbol_rate, .115, NTAPS);
}
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