NFFT 3.5.3alpha
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>

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.
 
int aN1_total
 aN1_total=aN1[0]* ... *aN1[d-1]
 
nfftf_plan * direct_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 424 of file nfft3.h.

Field Documentation

◆ N_total

NFFT_INT nnfftf_plan::N_total

Total number of Fourier coefficients.

Definition at line 424 of file nfft3.h.

◆ M_total

NFFT_INT nnfftf_plan::M_total

Total number of samples.

Definition at line 424 of file nfft3.h.

◆ f_hat

fftwf_complex* nnfftf_plan::f_hat

Fourier coefficients.

Definition at line 424 of file nfft3.h.

◆ f

fftwf_complex* nnfftf_plan::f

Samples.

Definition at line 424 of file nfft3.h.

◆ mv_trafo

void(* nnfftf_plan::mv_trafo) (void *)

Transform.

Definition at line 424 of file nfft3.h.

◆ mv_adjoint

void(* nnfftf_plan::mv_adjoint) (void *)

Adjoint transform.

Definition at line 424 of file nfft3.h.

◆ d

int nnfftf_plan::d

dimension, rank

Definition at line 424 of file nfft3.h.

◆ sigma

float* nnfftf_plan::sigma

oversampling-factor

Definition at line 424 of file nfft3.h.

◆ a

float* nnfftf_plan::a

1 + 2*m/N1

Definition at line 424 of file nfft3.h.

◆ N

int* nnfftf_plan::N

cut-off-frequencies

Definition at line 424 of file nfft3.h.

◆ N1

int* nnfftf_plan::N1

sigma*N

Definition at line 424 of file nfft3.h.

◆ aN1

int* nnfftf_plan::aN1

sigma*a*N

Definition at line 424 of file nfft3.h.

◆ m

int nnfftf_plan::m

cut-off parameter in time-domain

Definition at line 424 of file nfft3.h.

◆ b

float* nnfftf_plan::b

shape parameters

Definition at line 424 of file nfft3.h.

◆ K

int nnfftf_plan::K

number of precomp.

uniform psi

Definition at line 424 of file nfft3.h.

◆ aN1_total

int nnfftf_plan::aN1_total

aN1_total=aN1[0]* ... *aN1[d-1]

Definition at line 424 of file nfft3.h.

◆ direct_plan

nfftf_plan* nnfftf_plan::direct_plan

plan for the nfft

Definition at line 424 of file nfft3.h.

◆ nnfft_flags

unsigned nnfftf_plan::nnfft_flags

flags for precomputation, malloc

Definition at line 424 of file nfft3.h.

◆ n

int* nnfftf_plan::n

n=N1, for the window function

Definition at line 424 of file nfft3.h.

◆ x

float* nnfftf_plan::x

nodes (in time/spatial domain)

Definition at line 424 of file nfft3.h.

◆ v

float* nnfftf_plan::v

nodes (in fourier domain)

Definition at line 424 of file nfft3.h.

◆ c_phi_inv

float* nnfftf_plan::c_phi_inv

precomputed data, matrix D

Definition at line 424 of file nfft3.h.

◆ psi

float* nnfftf_plan::psi

precomputed data, matrix B

Definition at line 424 of file nfft3.h.

◆ size_psi

int nnfftf_plan::size_psi

only for thin B

Definition at line 424 of file nfft3.h.

◆ psi_index_g

int* nnfftf_plan::psi_index_g

only for thin B

Definition at line 424 of file nfft3.h.

◆ psi_index_f

int* nnfftf_plan::psi_index_f

only for thin B

Definition at line 424 of file nfft3.h.

◆ F

fftwf_complex* nnfftf_plan::F

Definition at line 424 of file nfft3.h.

◆ spline_coeffs

float* nnfftf_plan::spline_coeffs

input for de Boor algorithm, if B_SPLINE or SINC_2m is defined

Definition at line 424 of file nfft3.h.


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