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Removed unused symbol synchronization object and irrelevant references to liquidsdr. Fixes #1104

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f4exb 2022-01-15 02:23:14 +01:00
parent a1c85aac17
commit 68edf32cd7
6 changed files with 0 additions and 147 deletions
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3
sdrbase/dsp/spectrummarkers.cpp
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@ -1,9 +1,6 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2021 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //

3
sdrbase/dsp/spectrummarkers.h
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@ -1,9 +1,6 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2021 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //

3
sdrbase/dsp/spectrumvis.cpp
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@ -1,9 +1,6 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //

3
sdrbase/dsp/spectrumvis.h
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@ -1,9 +1,6 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //

96
sdrbase/dsp/symsync.cpp
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@ -1,96 +0,0 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program 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 V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "symsync.h"
SymbolSynchronizer::SymbolSynchronizer()
{
// For now use hardcoded values:
// - RRC filter
// - 4 samples per symbol
// - 5 symbols delay filter
// - 0.5 filter excess bandwidth factor
// - 32 filter elements for the internal polyphase filter
m_sync = symsync_crcf_create_rnyquist(LIQUID_FIRFILT_RRC, 4, 5, 0.5f, 32);
// - 0.02 loop filter bandwidth factor
symsync_crcf_set_lf_bw(m_sync, 0.01f);
// - 4 samples per symbol output rate
symsync_crcf_set_output_rate(m_sync, 4);
m_syncSampleCount = 0;
}
SymbolSynchronizer::~SymbolSynchronizer()
{
symsync_crcf_destroy(m_sync);
}
Real SymbolSynchronizer::run(const Sample& s)
{
unsigned int nn;
Real v = -1.0f;
liquid_float_complex y = (s.m_real / SDR_RX_SCALEF) + (s.m_imag / SDR_RX_SCALEF)*I;
symsync_crcf_execute(m_sync, &y, 1, m_z, &nn);
for (unsigned int i = 0; i < nn; i++)
{
if (nn != 1) {
qDebug("SymbolSynchronizer::run: %u", nn);
}
if (m_syncSampleCount % 4 == 0) {
v = 1.0f;
}
if (m_syncSampleCount < 4095) {
m_syncSampleCount++;
} else {
qDebug("SymbolSynchronizer::run: tau: %f", symsync_crcf_get_tau(m_sync));
m_syncSampleCount = 0;
}
}
return v;
}
liquid_float_complex SymbolSynchronizer::runZ(const Sample& s)
{
unsigned int nn;
liquid_float_complex y = (s.m_real / SDR_RX_SCALEF) + (s.m_imag / SDR_RX_SCALEF)*I;
symsync_crcf_execute(m_sync, &y, 1, m_z, &nn);
for (unsigned int i = 0; i < nn; i++)
{
if (nn != 1) {
qDebug("SymbolSynchronizer::run: %u", nn);
}
if (m_syncSampleCount == 0) {
m_z0 = m_z[i];
}
if (m_syncSampleCount < 3) {
m_syncSampleCount++;
} else {
m_syncSampleCount = 0;
}
}
return m_z0;
}

39
sdrbase/dsp/symsync.h
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@ -1,39 +0,0 @@
///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2018 Edouard Griffiths, F4EXB //
// //
// Symbol synchronizer or symbol clock recovery mostly encapsulating //
// liquid-dsp's symsync "object" //
// //
// This program 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 as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program 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 V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "dsp/dsptypes.h"
#include "liquid.h"
#include <complex.h>
class SymbolSynchronizer
{
public:
SymbolSynchronizer();
~SymbolSynchronizer();
Real run(const Sample& s);
liquid_float_complex runZ(const Sample& s);
private:
symsync_crcf m_sync;
liquid_float_complex m_z[4+4]; // 4 samples per symbol. One symbol plus extra space
liquid_float_complex m_z0;
int m_syncSampleCount;
};