DoubleComplexBackward1DFFT Class

DoubleComplexBackward1DFFT represents the backward discrete fourier transform of a 1D complex signal vector.

Inheritance Hierarchy

SystemObject
CenterSpace.NMath.CoreFFTBase
CenterSpace.NMath.CoreDoubleComplexBackward1DFFT

Namespace: CenterSpace.NMath.Core
Assembly: NMath (in NMath.dll) Version: 7.4

Syntax

C++

Copy

[SerializableAttribute]
public class DoubleComplexBackward1DFFT : FFTBase, 
	ICloneable

<SerializableAttribute>
Public Class DoubleComplexBackward1DFFT
	Inherits FFTBase
	Implements ICloneable

[SerializableAttribute]
public ref class DoubleComplexBackward1DFFT : public FFTBase, 
	ICloneable

[<SerializableAttribute>]
type DoubleComplexBackward1DFFT = 
    class
        inherit FFTBase
        interface ICloneable
    end

The DoubleComplexBackward1DFFT type exposes the following members.

Constructors

	Name	Description
	DoubleComplexBackward1DFFT(FFTBase)	Constructs a backward 1D FFT instance by copying the configuration from another FFT instance.
	DoubleComplexBackward1DFFT(Int32)	Constructs a backward 1D FFT instance for double complex signal vectors.

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Properties

	Name	Description
	BackwardScaleFactor	Gets or sets the backward scale factor of FFT, the default is 1.0
	Dimension	Gets the FFT dimension. (Inherited from FFTBase)
	Direction	Gets the direction of the FFT, either forward or backward. (Inherited from FFTBase)
	Domain	Gets the forward domain of signal data; either complex or real. (Inherited from FFTBase)
	Length	Gets the length of the signal data. (Inherited from FFTBase)
	Precision	Gets the FFT precision; either float or double (Inherited from FFTBase)

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Methods

	Name	Description
	Clone	Creates a deep copy of this FFT instance.
	CreateInverseFFT	Creates a forward FFT instance of this backward double complex 1D FFT.
	FFT(DoubleComplex)	Computes the backward FFT of vin.
	FFT(DoubleComplexVector)	Computes the backward FFT of vin and places the result in vout
	FFT(DoubleComplex, DoubleComplex)	Computes the backward FFT of vin and places the result in vout
	FFT(DoubleComplexVector, DoubleComplexVector)	Computes the backward FFT of vin and places the result in vout
	FFT(DoubleComplex, Int32, DoubleComplex, Int32)	Computes the backward FFT of vin and places the result in vout, where vin and vout contain offtset signal data, vinoffset, voutoffset, respectively, from the [0] element.
	FFTInPlace(DoubleComplex)	Computes the in-place backward FFT of the signal vinout.
	FFTInPlace(DoubleComplex)	Obsolete. Computes the backward FFT of each row in arrayinout and returns the results in-place.
	FFTInPlace(DoubleComplexVector)	Computes the in-place backward FFT of the signal vinout.
	FFTInPlace(DoubleComplex, Int32)	Computes the in-place backward FFT of the signal vinout.
	FFTInPlaceArray	Computes the backward FFT of each row in arrayinout and returns the results in-place.
	SetScaleFactorByLength	Sets the backward FFT scale factor to 1/SignalLength.
	ToString	Returns a String containing a summary of this FFT type. (Inherited from FFTBase)

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Fields

	Name	Description
	ipconfig_	In-place FFT configuration. (Inherited from FFTBase)
	ofpconfig_	Out-of-place FFT configuration. (Inherited from FFTBase)

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Remarks

The backward FFT is defined to have a positive exponent in the transform with a default scale factor of 1.0. When using this default backward scale factor, backward and forward discrete fourier transforms will not be symmetric inverses. If needed, call the SetScaleFactorByLength() method to gain this symmetry. MATLAB uses this scale factor by default. To gain greater efficiency in transforming sets of same-length signals, first arrange signals row-by-row in an array, and then use the FFTInPlace(DoubleComplex[,] arrayinout) method.

Reference

CenterSpace.NMath.Core Namespace