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306 lines
9.3 KiB
C++
306 lines
9.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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// Copyright (C) 2015-2022 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// Copyright (C) 2022 Jiří Pinkava <jiri.pinkava@rossum.ai> //
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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 as version 3 of the License, or //
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// (at your option) 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 V3 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. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <QMutexLocker>
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#include <QDebug>
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#include "dsp/downchannelizer.h"
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#include "dsp/basebandsamplesink.h"
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#include "dsp/scopevis.h"
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#include "dsp/dspcommands.h"
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#include "doa2baseband.h"
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#include "doa2settings.h"
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MESSAGE_CLASS_DEFINITION(DOA2Baseband::MsgConfigureChannelizer, Message)
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MESSAGE_CLASS_DEFINITION(DOA2Baseband::MsgSignalNotification, Message)
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MESSAGE_CLASS_DEFINITION(DOA2Baseband::MsgConfigureCorrelation, Message)
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DOA2Baseband::DOA2Baseband(int fftSize) :
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m_correlator(fftSize),
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m_correlationType(DOA2Settings::CorrelationFFT),
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m_fftSize(fftSize),
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m_samplesCount(0),
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m_magSum(0.0f),
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m_wphSum(0.0f),
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m_phi(0.0f),
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m_magThreshold(0.0f),
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m_fftAvg(1),
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m_fftAvgCount(0),
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m_scopeSink(nullptr)
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{
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m_sampleMIFifo.init(2, 96000 * 8);
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m_vbegin.resize(2);
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for (int i = 0; i < 2; i++)
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{
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m_sinks[i].setStreamIndex(i);
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m_channelizers[i] = new DownChannelizer(&m_sinks[i]);
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m_sizes[i] = 0;
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}
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QObject::connect(
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&m_sampleMIFifo,
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&SampleMIFifo::dataSyncReady,
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this,
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&DOA2Baseband::handleData,
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Qt::QueuedConnection
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);
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
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m_lastStream = 0;
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}
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DOA2Baseband::~DOA2Baseband()
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{
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for (int i = 0; i < 2; i++)
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{
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delete m_channelizers[i];
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}
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}
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void DOA2Baseband::reset()
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{
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QMutexLocker mutexLocker(&m_mutex);
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m_sampleMIFifo.reset();
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for (int i = 0; i < 2; i++) {
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m_sinks[i].reset();
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}
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}
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void DOA2Baseband::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, unsigned int streamIndex)
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{
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if (streamIndex > 1) {
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return;
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}
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if (streamIndex == m_lastStream) {
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qWarning("DOA2Baseband::feed: twice same stream in a row: %u", streamIndex);
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}
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m_lastStream = streamIndex;
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m_vbegin[streamIndex] = begin;
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m_sizes[streamIndex] = end - begin;
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if (streamIndex == 1)
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{
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if (m_sizes[0] != m_sizes[1])
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{
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qWarning("DOA2Baseband::feed: unequal sizes: [0]: %d [1]: %d", m_sizes[0], m_sizes[1]);
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m_sampleMIFifo.writeSync(m_vbegin, std::min(m_sizes[0], m_sizes[1]));
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}
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else
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{
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m_sampleMIFifo.writeSync(m_vbegin, m_sizes[0]);
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}
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}
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}
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void DOA2Baseband::handleData()
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{
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QMutexLocker mutexLocker(&m_mutex);
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const std::vector<SampleVector>& data = m_sampleMIFifo.getData();
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unsigned int ipart1begin;
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unsigned int ipart1end;
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unsigned int ipart2begin;
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unsigned int ipart2end;
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while ((m_sampleMIFifo.fillSync() > 0) && (m_inputMessageQueue.size() == 0))
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{
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m_sampleMIFifo.readSync(ipart1begin, ipart1end, ipart2begin, ipart2end);
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if (ipart1begin != ipart1end) { // first part of FIFO data
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processFifo(data, ipart1begin, ipart1end);
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}
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if (ipart2begin != ipart2end) { // second part of FIFO data (used when block wraps around)
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processFifo(data, ipart2begin, ipart2end);
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}
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}
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}
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void DOA2Baseband::processFifo(const std::vector<SampleVector>& data, unsigned int ibegin, unsigned int iend)
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{
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for (unsigned int stream = 0; stream < 2; stream++) {
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m_channelizers[stream]->feed(data[stream].begin() + ibegin, data[stream].begin() + iend);
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}
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run();
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}
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void DOA2Baseband::run()
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{
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if (m_correlator.performCorr(m_sinks[0].getData(), m_sinks[0].getSize(), m_sinks[1].getData(), m_sinks[1].getSize()))
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{
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if (m_correlationType == DOA2Settings::CorrelationType::CorrelationFFT) {
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processDOA(m_correlator.m_xcorr.begin(), m_correlator.m_processed);
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}
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if (m_scopeSink)
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{
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std::vector<SampleVector::const_iterator> vbegin;
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vbegin.push_back(m_correlator.m_tcorr.begin());
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m_scopeSink->feed(vbegin, m_correlator.m_processed);
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}
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}
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for (int i = 0; i < 2; i++)
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{
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std::copy(
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m_sinks[i].getData().begin() + m_correlator.m_processed,
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m_sinks[i].getData().begin() + m_correlator.m_processed + m_correlator.m_remaining[i],
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m_sinks[i].getData().begin()
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);
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m_sinks[i].setDataStart(m_correlator.m_remaining[i]);
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}
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}
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void DOA2Baseband::handleInputMessages()
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{
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qDebug("DOA2Baseband::handleInputMessage");
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Message* message;
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while ((message = m_inputMessageQueue.pop()) != 0)
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{
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if (handleMessage(*message)) {
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delete message;
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}
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}
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}
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bool DOA2Baseband::handleMessage(const Message& cmd)
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{
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if (MsgConfigureChannelizer::match(cmd))
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{
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QMutexLocker mutexLocker(&m_mutex);
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MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
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int log2Decim = cfg.getLog2Decim();
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int filterChainHash = cfg.getFilterChainHash();
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qDebug() << "DOA2Baseband::handleMessage: MsgConfigureChannelizer:"
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<< " log2Decim: " << log2Decim
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<< " filterChainHash: " << filterChainHash;
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for (int i = 0; i < 2; i++)
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{
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m_channelizers[i]->setDecimation(log2Decim, filterChainHash);
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m_sinks[i].reset();
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}
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return true;
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}
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else if (MsgSignalNotification::match(cmd))
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{
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QMutexLocker mutexLocker(&m_mutex);
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MsgSignalNotification& cfg = (MsgSignalNotification&) cmd;
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int inputSampleRate = cfg.getInputSampleRate();
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qint64 centerFrequency = cfg.getCenterFrequency();
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int streamIndex = cfg.getStreamIndex();
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qDebug() << "DOA2Baseband::handleMessage: MsgSignalNotification:"
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<< " inputSampleRate: " << inputSampleRate
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<< " centerFrequency: " << centerFrequency
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<< " streamIndex: " << streamIndex;
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if (streamIndex < 2)
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{
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m_channelizers[streamIndex]->setBasebandSampleRate(inputSampleRate);
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m_sinks[streamIndex].reset();
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}
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return true;
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}
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else if (MsgConfigureCorrelation::match(cmd))
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{
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QMutexLocker mutexLocker(&m_mutex);
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MsgConfigureCorrelation& cfg = (MsgConfigureCorrelation&) cmd;
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m_correlationType = cfg.getCorrelationType();
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qDebug() << "DOA2Baseband::handleMessage: MsgConfigureCorrelation:"
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<< " correlationType: " << m_correlationType;
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m_correlator.setCorrType(m_correlationType);
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return true;
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}
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else
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{
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qDebug("DOA2Baseband::handleMessage: unhandled: %s", cmd.getIdentifier());
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return false;
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}
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}
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void DOA2Baseband ::setBasebandSampleRate(unsigned int sampleRate)
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{
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for (int istream = 0; istream < 2; istream++)
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{
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m_channelizers[istream]->setBasebandSampleRate(sampleRate);
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m_sinks[istream].reset();
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}
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}
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void DOA2Baseband::setFFTAveraging(int nbFFT)
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{
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qDebug("DOA2Baseband::setFFTAveraging: %d", nbFFT);
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m_fftAvg = nbFFT < 1 ? 1 : nbFFT;
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m_fftAvgCount = 0;
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m_magSum = 0;
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m_wphSum = 0;
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m_samplesCount = 0;
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}
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void DOA2Baseband::processDOA(const std::vector<Complex>::iterator& begin, int nbSamples, bool reverse)
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{
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const std::vector<Complex>::iterator end = begin + nbSamples;
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for (std::vector<Complex>::iterator it = begin; it != end; ++it)
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{
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float ph = std::arg(*it);
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double mag = std::norm(*it);
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if (mag > m_magThreshold)
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{
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m_magSum += mag;
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m_wphSum += mag*ph;
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}
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if (++m_samplesCount == m_fftSize)
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{
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if (m_wphSum != 0)
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{
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if (++m_fftAvgCount == m_fftAvg)
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{
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m_phi = reverse ? -(m_wphSum / m_magSum) : (m_wphSum / m_magSum);
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m_fftAvgCount = 0;
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}
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}
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m_magSum = 0;
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m_wphSum = 0;
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m_samplesCount = 0;
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}
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}
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}
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