data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with long double precision
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#include <nfft3.h>
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NFFT_INT | N_total |
| Total number of Fourier coefficients.
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NFFT_INT | M_total |
| Total number of samples.
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fftwl_complex * | f_hat |
| Fourier coefficients.
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fftwl_complex * | f |
| Samples.
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void(* | mv_trafo )(void *) |
| Transform.
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void(* | mv_adjoint )(void *) |
| Adjoint transform.
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int | d |
| dimension, rank
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long double * | sigma |
| oversampling-factor
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long double * | a |
| 1 + 2*m/N1
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int * | N |
| cut-off-frequencies
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int * | N1 |
| sigma*N
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int * | aN1 |
| sigma*a*N
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int | m |
| cut-off parameter in time-domain
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long double * | b |
| shape parameters
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int | K |
| number of precomp.
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int | aN1_total |
| aN1_total=aN1[0]* ... *aN1[d-1]
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nfftl_plan * | direct_plan |
| plan for the nfft
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unsigned | nnfft_flags |
| flags for precomputation, malloc
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int * | n |
| n=N1, for the window function
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long double * | x |
| nodes (in time/spatial domain)
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long double * | v |
| nodes (in fourier domain)
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long double * | c_phi_inv |
| precomputed data, matrix D
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long double * | psi |
| precomputed data, matrix B
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int | size_psi |
| only for thin B
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int * | psi_index_g |
| only for thin B
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int * | psi_index_f |
| only for thin B
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fftwl_complex * | F |
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long double * | spline_coeffs |
| input for de Boor algorithm, if B_SPLINE or SINC_2m is defined
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data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with long double precision
Definition at line 426 of file nfft3.h.
◆ N_total
NFFT_INT nnfftl_plan::N_total |
Total number of Fourier coefficients.
Definition at line 426 of file nfft3.h.
◆ M_total
NFFT_INT nnfftl_plan::M_total |
Total number of samples.
Definition at line 426 of file nfft3.h.
◆ f_hat
fftwl_complex* nnfftl_plan::f_hat |
Fourier coefficients.
Definition at line 426 of file nfft3.h.
fftwl_complex* nnfftl_plan::f |
◆ mv_trafo
void(* nnfftl_plan::mv_trafo) (void *) |
Transform.
Definition at line 426 of file nfft3.h.
◆ mv_adjoint
void(* nnfftl_plan::mv_adjoint) (void *) |
Adjoint transform.
Definition at line 426 of file nfft3.h.
dimension, rank
Definition at line 426 of file nfft3.h.
◆ sigma
long double* nnfftl_plan::sigma |
oversampling-factor
Definition at line 426 of file nfft3.h.
long double* nnfftl_plan::a |
1 + 2*m/N1
Definition at line 426 of file nfft3.h.
cut-off-frequencies
Definition at line 426 of file nfft3.h.
◆ N1
◆ aN1
cut-off parameter in time-domain
Definition at line 426 of file nfft3.h.
long double* nnfftl_plan::b |
shape parameters
Definition at line 426 of file nfft3.h.
number of precomp.
uniform psi
Definition at line 426 of file nfft3.h.
◆ aN1_total
int nnfftl_plan::aN1_total |
aN1_total=aN1[0]* ... *aN1[d-1]
Definition at line 426 of file nfft3.h.
◆ direct_plan
nfftl_plan* nnfftl_plan::direct_plan |
plan for the nfft
Definition at line 426 of file nfft3.h.
◆ nnfft_flags
unsigned nnfftl_plan::nnfft_flags |
flags for precomputation, malloc
Definition at line 426 of file nfft3.h.
n=N1, for the window function
Definition at line 426 of file nfft3.h.
long double* nnfftl_plan::x |
nodes (in time/spatial domain)
Definition at line 426 of file nfft3.h.
long double* nnfftl_plan::v |
nodes (in fourier domain)
Definition at line 426 of file nfft3.h.
◆ c_phi_inv
long double* nnfftl_plan::c_phi_inv |
precomputed data, matrix D
Definition at line 426 of file nfft3.h.
◆ psi
long double* nnfftl_plan::psi |
precomputed data, matrix B
Definition at line 426 of file nfft3.h.
◆ size_psi
int nnfftl_plan::size_psi |
only for thin B
Definition at line 426 of file nfft3.h.
◆ psi_index_g
int* nnfftl_plan::psi_index_g |
only for thin B
Definition at line 426 of file nfft3.h.
◆ psi_index_f
int* nnfftl_plan::psi_index_f |
only for thin B
Definition at line 426 of file nfft3.h.
fftwl_complex* nnfftl_plan::F |
◆ spline_coeffs
long double* nnfftl_plan::spline_coeffs |
input for de Boor algorithm, if B_SPLINE or SINC_2m is defined
Definition at line 426 of file nfft3.h.
The documentation for this struct was generated from the following file: