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bug found in PRN resampler code. Disabled optimization

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Javier
2015-06-12 19:28:56 +02:00
parent 7a4ecf3ddb
commit 26a6bbd37a
4 changed files with 85 additions and 62 deletions
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13
src/algorithms/libs/gps_l2c_signal.cc
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@@ -86,15 +86,14 @@ void gps_l2c_m_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int
signed int _samplesPerCode, _codeValueIndex;
float _ts;
float _tc;
const signed int _codeFreqBasis = GPS_L2_M_CODE_RATE_HZ; //Hz
const signed int _codeLength = GPS_L2_M_CODE_LENGTH_CHIPS;
//--- Find number of samples per spreading code ----------------------------
_samplesPerCode = static_cast<int>(static_cast<double>(_fs) / (static_cast<double>(_codeFreqBasis) / static_cast<double>(_codeLength)));
_samplesPerCode = static_cast<int>(static_cast<double>(_fs) / (static_cast<double>(GPS_L2_M_CODE_RATE_HZ) / static_cast<double>(_codeLength)));
//--- Find time constants --------------------------------------------------
_ts = 1.0 / static_cast<float>(_fs); // Sampling period in sec
_tc = 1.0 / static_cast<float>(_codeFreqBasis); // C/A chip period in sec
_tc = 1.0 / static_cast<float>(GPS_L2_M_CODE_RATE_HZ); // C/A chip period in sec
float aux;
@@ -108,9 +107,9 @@ void gps_l2c_m_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int
// millisecond).
//TODO: Check this formula! Seems to start with an extra sample
// _codeValueIndex = ceil((_ts * ((float)i + 1)) / _tc) - 1;
aux = (_ts * (i + 1)) / _tc;
_codeValueIndex = static_cast<int>(static_cast<long>(aux)) - 1;
_codeValueIndex = ceil((_ts * ((float)i + 1)) / _tc) - 1;
//aux = (_ts * (i + 1)) / _tc;
//_codeValueIndex = static_cast<int>(static_cast<long>(aux)) - 1;
//--- Make the digitized version of the C/A code -----------------------
// The "upsampled" code is made by selecting values form the CA code
@@ -123,7 +122,7 @@ void gps_l2c_m_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int
}
else
{
_dest[i] = std::complex<float>(1.0 - 2.0 * _code[_codeValueIndex], 0);; //repeat the chip -> upsample
_dest[i] = std::complex<float>(1.0 - 2.0 * _code[_codeValueIndex], 0); //repeat the chip -> upsample
}
}
delete[] _code;