NFFT  3.5.3
Data Fields
nnfftf_plan Struct Reference

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

#include <nfft3.h>

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Data Fields

NFFT_INT N_total
 Total number of Fourier coefficients.
 
NFFT_INT M_total
 Total number of samples.
 
fftwf_complex * f_hat
 Fourier coefficients.
 
fftwf_complex * f
 Samples.
 
void(* mv_trafo )(void *)
 Transform.
 
void(* mv_adjoint )(void *)
 Adjoint transform.
 
int d
 dimension, rank
 
float * sigma
 oversampling-factor
 
float * 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
 
float * b
 shape parameters
 
int K
 number of precomp. More...
 
int aN1_total
 aN1_total=aN1[0]* ... More...
 
nfftf_plandirect_plan
 plan for the nfft
 
unsigned nnfft_flags
 flags for precomputation, malloc
 
int * n
 n=N1, for the window function
 
float * x
 nodes (in time/spatial domain)
 
float * v
 nodes (in fourier domain)
 
float * c_phi_inv
 precomputed data, matrix D
 
float * 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
 
fftwf_complex * F
 
float * 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 float precision

Definition at line 412 of file nfft3.h.

Field Documentation

◆ K

int nnfftf_plan::K

number of precomp.

uniform psi

Definition at line 412 of file nfft3.h.

◆ aN1_total

int nnfftf_plan::aN1_total

aN1_total=aN1[0]* ...

*aN1[d-1]

Definition at line 412 of file nfft3.h.


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