jankae/LibreVNA
1
0
Fork 0
mirror of https://github.com/jankae/LibreVNA.git synced 2025-12-06 07:12:10 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Shift TDR output from positive times only to centered around zero

Browse source
This commit is contained in:
Jan Käberich 2024-07-10 10:05:25 +02:00
parent 5f2788467b
commit f2df7ad3f0
1 changed files with 4 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
Software/PC_Application/LibreVNA-GUI/Traces/Math/tdr.cpp
View file

@ -323,15 +323,16 @@ void TDRThread::run()
tdr.window.apply(frequencyDomain); tdr.window.apply(frequencyDomain);
Fft::shift(frequencyDomain, true); Fft::shift(frequencyDomain, true);
auto fft_bins = frequencyDomain.size(); int fft_bins = frequencyDomain.size();
const double fs = 1.0 / (stepSize * fft_bins); const double fs = 1.0 / (stepSize * fft_bins);
Fft::transform(frequencyDomain, true); Fft::transform(frequencyDomain, true);
Fft::shift(frequencyDomain, false);
tdr.data.resize(fft_bins, TraceMath::Data()); tdr.data.resize(fft_bins, TraceMath::Data());
for(unsigned int i = 0;i<fft_bins;i++) { for(int i = 0;i<fft_bins;i++) {
tdr.data[i].x = fs * i; tdr.data[i].x = fs * (i - fft_bins / 2);
tdr.data[i].y = frequencyDomain[i] / (double) fft_bins; tdr.data[i].y = frequencyDomain[i] / (double) fft_bins;
} }
if(tdr.stepResponse && tdr.mode == TDR::Mode::Lowpass) { if(tdr.stepResponse && tdr.mode == TDR::Mode::Lowpass) {