SignalUtils::BlackmanExact Function

Overload List

#	Signature	Description
1	TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode);	Exact blackman window.
2	TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode, int Index, int Len);	Exact Blackman window.

Overload 1: TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode);

Exact blackman window.

#	Name	Type	Description
1	Src	TVec *
2	WindowMode	TSignalWindowMode

Remarks:

Applies exact Blackman window to Src. Window functions are applied to the signal prior to conversion to frequency domain with the FFT algorithm, to reduce the spectral leakage. Their side-effect is a lower frequency resolution.

w[n] := 0.42659071 - 0.49656062*cos(2*Pi*n/(n-1)) + 0.07684867*cos(4*Pi*n/(n-1))

0 <= n <= M - 1

Examples

#include "MtxExpr.h"
#include "Units.MtxExpr.h"
#include "Units.SignalUtils.h"

using namespace Dew;
using namespace Dew::Math;
using namespace Dew::Math::Units::MtxExpr;
using namespace Dew::Signal;
using namespace Dew::Signal::Units::SignalUtils;

void Example()
{
    Vector h = Sin(Ramp(256, TMtxFloatPrecision::mvDouble, 0, 2 * PI * 0.1));
    Vector h1(0);
    Vector Response(0);
    Vector Response1(0);

    h1.Copy(h);
    BlackmanExact(h, TSignalWindowMode::wmSymmetric);  //window the sinc impulse response

    h = h * 2.344168; //scale the signal to compensate for energy loss
    FrequencyResponse(h1, nullptr, Response, 8, false, TSignalWindowType::wtRectangular, 0);
    FrequencyResponse(h, nullptr, Response1, 8, false, TSignalWindowType::wtRectangular, 0);
}

See Also: SignalUtils::Kaiser, SignalUtils::SignalWindow

Declared in Dew::Signal::Units::SignalUtils · Dew.Signal/Units.SignalUtils.h · Cross-compiler

Overload 2: TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode, int Index, int Len);

Exact Blackman window.

#	Name	Type
1	Src	TVec *
2	WindowMode	TSignalWindowMode
3	Index	int
4	Len	int

Remarks:

Applies Exact Blackman window to Src vector from element at Index to element at Index + Len - 1.

Declared in Dew::Signal::Units::SignalUtils · Dew.Signal/Units.SignalUtils.h · Cross-compiler

Overload List

Overload 1: TVec *BlackmanExact(TVec *Src, TSignalWindowMode WindowMode);

Overload 2: TVec *BlackmanExact(TVec *Src, TSignalWindowMode WindowMode, int Index, int Len);

Overload 1: TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode);

Overload 2: TVec BlackmanExact(TVec Src, TSignalWindowMode WindowMode, int Index, int Len);