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TestSource: implemente DC and IQ bias and corrections

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This commit is contained in:
f4exb
2018-01-14 11:58:36 +01:00
parent 45e04f06ae
commit bd8c916dd4
8 changed files with 326 additions and 4 deletions
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plugins/samplesource/testsource/testsourcethread.cpp
+29 -2
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@@ -37,6 +37,12 @@ TestSourceThread::TestSourceThread(SampleSinkFifo* sampleFifo, QObject* parent)
m_bitSizeIndex(0),
m_bitShift(8),
m_amplitudeBits(127),
m_dcBias(0.0f),
m_iBias(0.0f),
m_qBias(0.0f),
m_amplitudeBitsDC(0),
m_amplitudeBitsI(127),
m_amplitudeBitsQ(127),
m_frequency(435*1000),
m_fcPosShift(0),
m_throttlems(TESTSOURCE_THROTTLE_MS),
@@ -109,6 +115,27 @@ void TestSourceThread::setBitSize(quint32 bitSizeIndex)
void TestSourceThread::setAmplitudeBits(int32_t amplitudeBits)
{
m_amplitudeBits = amplitudeBits;
m_amplitudeBitsDC = m_dcBias * amplitudeBits;
m_amplitudeBitsI = (1.0f + m_iBias) * amplitudeBits;
m_amplitudeBitsQ = (1.0f + m_qBias) * amplitudeBits;
}
void TestSourceThread::setDCFactor(float dcFactor)
{
m_dcBias = dcFactor;
m_amplitudeBitsDC = m_dcBias * m_amplitudeBits;
}
void TestSourceThread::setIFactor(float iFactor)
{
m_iBias = iFactor;
m_amplitudeBitsI = (1.0f + m_iBias) * m_amplitudeBits;
}
void TestSourceThread::setQFactor(float iFactor)
{
m_qBias = iFactor;
m_amplitudeBitsQ = (1.0f + m_qBias) * m_amplitudeBits;
}
void TestSourceThread::setFrequencyShift(int shift)
@@ -163,8 +190,8 @@ void TestSourceThread::generate(quint32 chunksize)
for (int i = 0; i < n-1;)
{
Complex c = m_nco.nextIQ();
m_buf[i++] = (int16_t) (c.real() * (float) m_amplitudeBits);
m_buf[i++] = (int16_t) (c.imag() * (float) m_amplitudeBits);
m_buf[i++] = (int16_t) (c.real() * (float) m_amplitudeBitsI) + m_amplitudeBitsDC;
m_buf[i++] = (int16_t) (c.imag() * (float) m_amplitudeBitsQ);
}
callback(m_buf, n);