The sampling frequency is 256 Hz. A tone has a frequency 6Hz. After flipping the frequencies, the tone has a frequency of: FS/2 - 6 = 122Hz.
uses MtxExpr, Math387, MtxVec, SignalUtils, MtxVecTee, MtxVecEdit; procedure TForm1.Button1Click(Sender: TObject); var b,c,Response1, Response2: Vector; begin b := Sin(Ramp(256, mvDouble, 0,2*Pi*6/256)); c.Copy(b); BandFlip(b); DrawIt([c,b],['Original signal','Flipped signal']); FrequencyResponse(c,nil,Response1,1,True); FrequencyResponse(b,nil,Response2,1,True); DrawIt([Response1,Response2],['Spectrum: original signal','Spectrum: flipped signal']); end;
#include "MtxExpr.hpp" #include "MtxVecEdit.hpp" #include "MtxVecTee.hpp" #include "SignalUtils.hpp" void __fastcall TForm1::BitBtn1Click(TObject *Sender) { Vector b,c, Response1, Response2; b = Sin(Ramp(256, mvDouble, 0,2.0*PI*6/256)); c.Copy(b); BandFlip(b); DrawIt(OPENARRAY(TVec*,(c,b)),OPENARRAY(AnsiString,("Original signal","Flipped signal"))); FrequencyResponse(c,NULL,Response1,1,true); FrequencyResponse(b,NULL,Response2,1,true); DrawIt(OPENARRAY(TVec*,(Response1,Response2)),OPENARRAY(AnsiString,("Spectrum: original signal","Spectrum: flipped signal"))); }
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