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48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __AIS_BASEBAND_H__
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#define __AIS_BASEBAND_H__
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#include <cstdint>
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#include <cstddef>
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#include <complex>
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#include <array>
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#include <bitset>
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#include <utility>
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namespace baseband {
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namespace ais {
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// Translate+Rectangular window filter
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// sample=38.4k, deviation=2400, symbol=9600
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// Length: 4 taps, 1 symbol, 1/4 cycle of sinusoid
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// Gain: 1.0 (sinusoid / len(taps))
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constexpr std::array<std::complex<float>, 4> square_taps_38k4_1t_p { {
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{ 0.25000000f, 0.00000000f }, { 0.23096988f, 0.09567086f },
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{ 0.17677670f, 0.17677670f }, { 0.09567086f, 0.23096988f },
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} };
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} /* namespace ais */
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} /* namespace baseband */
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#endif/*__AIS_BASEBAND_H__*/
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