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>

Collaboration diagram for nnfft_plan:

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]* ... *aN1[d-1]
nfft_plan *	direct_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

NNFFT transform plan

Definition at line 419 of file nfft3.h.

Field Documentation

N_total

NFFT_INT nnfft_plan::N_total

Total number of Fourier coefficients.

Definition at line 419 of file nfft3.h.

Referenced by nnfft_init(), nnfft_init_guru(), nnfft_precompute_full_psi(), nnfft_precompute_psi(), and reconstruct().

M_total

NFFT_INT nnfft_plan::M_total

Total number of samples.

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_init(), nnfft_init_guru(), nnfft_precompute_full_psi(), nnfft_precompute_phi_hut(), nnfft_precompute_psi(), nnfft_trafo(), and reconstruct().

f_hat

fftw_complex* nnfft_plan::f_hat

Fourier coefficients.

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize().

f

fftw_complex* nnfft_plan::f

Samples.

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_finalize(), and nnfft_trafo().

mv_trafo

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

Transform.

Definition at line 419 of file nfft3.h.

mv_adjoint

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

Adjoint transform.

Definition at line 419 of file nfft3.h.

d

int nnfft_plan::d

dimension, rank

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_init(), nnfft_init_guru(), nnfft_precompute_full_psi(), nnfft_precompute_lin_psi(), nnfft_precompute_phi_hut(), nnfft_precompute_psi(), and nnfft_trafo().

sigma

double* nnfft_plan::sigma

oversampling-factor

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_precompute_full_psi(), nnfft_precompute_psi(), and nnfft_trafo().

a

double* nnfft_plan::a

1 + 2*m/N1

Definition at line 419 of file nfft3.h.

N

int* nnfft_plan::N

cut-off-frequencies

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), nnfft_init(), nnfft_init_guru(), and nnfft_precompute_phi_hut().

N1

int* nnfft_plan::N1

sigma*N

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), nnfft_init(), nnfft_init_guru(), nnfft_precompute_lin_psi(), and nnfft_precompute_psi().

aN1

int* nnfft_plan::aN1

sigma*a*N

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize().

m

int nnfft_plan::m

cut-off parameter in time-domain

Definition at line 419 of file nfft3.h.

Referenced by nnfft_init(), nnfft_init_guru(), nnfft_precompute_full_psi(), nnfft_precompute_lin_psi(), and nnfft_precompute_psi().

b

double* nnfft_plan::b

shape parameters

Definition at line 419 of file nfft3.h.

K

int nnfft_plan::K

number of precomp.

uniform psi

Definition at line 419 of file nfft3.h.

Referenced by nnfft_precompute_lin_psi().

aN1_total

int nnfft_plan::aN1_total

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

Definition at line 419 of file nfft3.h.

direct_plan

nfft_plan* nnfft_plan::direct_plan

plan for the nfft

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_finalize(), nnfft_precompute_full_psi(), nnfft_precompute_lin_psi(), nnfft_precompute_psi(), and nnfft_trafo().

nnfft_flags

unsigned nnfft_plan::nnfft_flags

flags for precomputation, malloc

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), nnfft_init(), nnfft_init_guru(), and reconstruct().

n

int* nnfft_plan::n

n=N1, for the window function

Definition at line 419 of file nfft3.h.

Referenced by nnfft_precompute_lin_psi(), nnfft_precompute_phi_hut(), and nnfft_precompute_psi().

x

double* nnfft_plan::x

nodes (in time/spatial domain)

Definition at line 419 of file nfft3.h.

Referenced by nnfft_adjoint(), nnfft_finalize(), nnfft_precompute_full_psi(), nnfft_precompute_phi_hut(), nnfft_precompute_psi(), nnfft_trafo(), and reconstruct().

v

double* nnfft_plan::v

nodes (in fourier domain)

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), nnfft_precompute_psi(), and reconstruct().

c_phi_inv

double* nnfft_plan::c_phi_inv

precomputed data, matrix D

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), and nnfft_precompute_phi_hut().

psi

double* nnfft_plan::psi

precomputed data, matrix B

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), nnfft_precompute_full_psi(), nnfft_precompute_lin_psi(), and nnfft_precompute_psi().

size_psi

int nnfft_plan::size_psi

only for thin B

Definition at line 419 of file nfft3.h.

psi_index_g

int* nnfft_plan::psi_index_g

only for thin B

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), and nnfft_precompute_full_psi().

psi_index_f

int* nnfft_plan::psi_index_f

only for thin B

Definition at line 419 of file nfft3.h.

Referenced by nnfft_finalize(), and nnfft_precompute_full_psi().

F

fftw_complex* nnfft_plan::F

Definition at line 419 of file nfft3.h.

spline_coeffs

double* nnfft_plan::spline_coeffs

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

Definition at line 419 of file nfft3.h.

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

• nfft3.h