ifft
Copyright (C) 2005 IENT-RWTH Aachen
template<class G1,class G2> inline void ifft(Vector<G1> &X, Vector<G2> &Y)
template<class G> inline PROMOTE2(complex<float>,Vector<G>) ifft(const Vector<G> &X)
template<class G1,class G2> inline void ifft(const Matrix<G1> &X, Matrix<G2> &Y)
template<class G> inline PROMOTE2(complex<float>,Matrix<G>) ifft(const Matrix<G> &X)
IFFT of a signal
Parameters
Y | The complex IFFT |
X | The signal |
Returns
Dense array of complex elements
Remarks
If Y contains real values, X is then supposed to be complex symetric and real_ifft is performed (with its constraints).
Example
DenseVector<complex<double> >::self X(4, 1); DenseVector<complex<double> >::self Y; Y=ifft(fft(X)); DenseVector<float>::self X(4, 1); DenseVector<complex<float> >::self Y(X.size()/2+1); half_real_fft(X,Y); // quicker than fft(X,Y) ifft(Y,X);
See Also