NFFT  3.3.2
Data Fields
nnfft_plan Struct Reference

data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with double precision More...

#include <nfft3.h>

Data Fields

NFFT_INT N_total
 Total number of Fourier coefficients.
NFFT_INT M_total
 Total number of samples.
fftw_complex * f_hat
 Fourier coefficients.
fftw_complex * f
 Samples.
void(* mv_trafo )(void *)
 Transform.
void(* mv_adjoint )(void *)
 Adjoint transform.
int d
 dimension, rank
double * sigma
 oversampling-factor
double * a
 1 + 2*m/N1
int * N
 cut-off-frequencies
int * N1
 sigma*N
int * aN1
 sigma*a*N
int m
 cut-off parameter in time-domain
double * b
 shape parameters
int K
 number of precomp.
int aN1_total
 aN1_total=aN1[0]* ...
nfft_plandirect_plan
 plan for the nfft
unsigned nnfft_flags
 flags for precomputation, malloc
int * n
 n=N1, for the window function
double * x
 nodes (in time/spatial domain)
double * v
 nodes (in fourier domain)
double * c_phi_inv
 precomputed data, matrix D
double * psi
 precomputed data, matrix B
int size_psi
 only for thin B
int * psi_index_g
 only for thin B
int * psi_index_f
 only for thin B
fftw_complex * F
double * spline_coeffs
 input for de Boor algorithm, if B_SPLINE or SINC_2m is defined

Detailed Description

data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with double precision

Definition at line 408 of file nfft3.h.


Field Documentation

Total number of Fourier coefficients.

Definition at line 408 of file nfft3.h.

Referenced by reconstruct().

Total number of samples.

Definition at line 408 of file nfft3.h.

Referenced by nnfft_precompute_full_psi(), nnfft_precompute_phi_hut(), nnfft_trafo(), and reconstruct().

fftw_complex* nnfft_plan::f_hat

Fourier coefficients.

Definition at line 408 of file nfft3.h.

fftw_complex* nnfft_plan::f

Samples.

Definition at line 408 of file nfft3.h.

Referenced by nnfft_trafo().

void(* nnfft_plan::mv_trafo)(void *)

Transform.

Definition at line 408 of file nfft3.h.

void(* nnfft_plan::mv_adjoint)(void *)

Adjoint transform.

Definition at line 408 of file nfft3.h.

number of precomp.

uniform psi

Definition at line 408 of file nfft3.h.

Referenced by nnfft_precompute_lin_psi().

aN1_total=aN1[0]* ...

*aN1[d-1]

Definition at line 408 of file nfft3.h.


The documentation for this struct was generated from the following file: