jens
90055961e8
- Transmitter use C++ NCO and upsampler git-svn-id: http://moon:8086/svn/software/trunk/projects/mpsk_rx_gui@111 b431acfa-c32f-4a4a-93f1-934dc6c82436
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
#include "Transmitter.h"
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Transmitter::Transmitter(void)
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: Thread("Transmitter")
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, m_symbolizer(this)
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, m_formatter(&m_symbolizer)
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, m_symbolMapper()
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, m_bufferSize(0)
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, m_samplerate(192000)
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, m_symbolrate(48000)
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, m_numBitPerSymbol(2)
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, m_carrierFreq(48000)
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, m_txBuf(0, 2)
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, m_symCount(0)
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, m_pCoeffRCF(0)
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, m_upsampleFactor(1)
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{
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SymMapInit(&m_symbolMapper, m_numBitPerSymbol, MAP_MODE_QAM);
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m_duc.init(m_carrierFreq/m_samplerate, 0);
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paramChanged();
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bufferResize(2048);
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}
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Transmitter::~Transmitter(void)
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{
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stopThread(1000);
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if (m_pCoeffRCF)
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delete m_pCoeffRCF;
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m_pCoeffRCF = nullptr;
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SymMapFree(&m_symbolMapper);
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}
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void Transmitter::paramChanged()
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{
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uint32_t n_mf;
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const ScopedLock sl (m_lock);
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m_symbolizer.setNumBitsPerSymbol(m_numBitPerSymbol);
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SymMapReinit(&m_symbolMapper, m_numBitPerSymbol, MAP_MODE_QAM);
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m_upsampleFactor = (uint32_t)(m_samplerate/m_symbolrate + 0.5);
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n_mf = (uint32_t)(TRANSMITTER_RCF_OVERSAMPLING*m_upsampleFactor) + 1;
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if (m_pCoeffRCF)
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delete m_pCoeffRCF;
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m_pCoeffRCF = new radio_float_t[n_mf];
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m_kRcf = CalcFirSRRC(m_pCoeffRCF, (radio_float_t)m_samplerate, (radio_float_t)2.0/m_symbolrate, TRANSMITTER_RCF_ROLLOFF, n_mf);
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m_firUp.init(m_upsampleFactor, m_pCoeffRCF, n_mf);
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m_duc.init(m_carrierFreq/m_samplerate, 0);
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}
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void Transmitter::bufferResize(uint32_t size)
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{
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stopThread(10000);
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m_bufferSize = size;
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m_txBuf.resize(size, 8);
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m_bufferRF.resize(size);
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m_bufferSym.resize(size);
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m_bufferSymRcf.resize(size);
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m_symCount = 0;
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startThread(0);
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}
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