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ChirpChat mod: increment or decrement phase for up and down chirps

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This commit is contained in:
f4exb 2020-03-07 22:05:56 +01:00
parent d1113fa0ab
commit 55279532a6
1 changed files with 4 additions and 5 deletions
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9
plugins/channeltx/modchirpchat/chirpchatmodsource.cpp
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@ -198,7 +198,7 @@ void ChirpChatModSource::modulateSample()
}
else if (m_state == ChirpChatStatePreamble)
{
m_modPhasor += m_phaseIncrements[m_chirp];
m_modPhasor += m_phaseIncrements[m_chirp]; // up chirps
m_modSample = Complex(std::polar(0.891235351562 * SDR_TX_SCALED, m_modPhasor));
m_fftCounter++;
@ -229,7 +229,7 @@ void ChirpChatModSource::modulateSample()
}
else if (m_state == ChirpChatStateSyncWord)
{
m_modPhasor += m_phaseIncrements[m_chirp];
m_modPhasor += m_phaseIncrements[m_chirp]; // up chirps
m_modSample = Complex(std::polar(0.891235351562 * SDR_TX_SCALED, m_modPhasor));
m_fftCounter++;
@ -252,8 +252,7 @@ void ChirpChatModSource::modulateSample()
}
else if (m_state == ChirpChatStateSFD)
{
int chirpIndex = m_fftLength*ChirpChatModSettings::oversampling - 1 - m_chirp;
m_modPhasor += m_phaseIncrements[chirpIndex];
m_modPhasor -= m_phaseIncrements[m_chirp]; // down chirps
m_modSample = Complex(std::polar(0.891235351562 * SDR_TX_SCALED, m_modPhasor));
m_fftCounter++;
m_sampleCounter++;
@ -282,7 +281,7 @@ void ChirpChatModSource::modulateSample()
}
else if (m_state == ChirpChatStatePayload)
{
m_modPhasor += m_phaseIncrements[m_chirp];
m_modPhasor += m_phaseIncrements[m_chirp]; // up chirps
m_modSample = Complex(std::polar(0.891235351562 * SDR_TX_SCALED, m_modPhasor));
m_fftCounter++;