data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with float precision
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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.
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| fftwf_complex * | f |
| | Samples.
|
| 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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float * | sigma |
| | oversampling-factor
|
|
float * | a |
| | 1 + 2*m/N1
|
|
int * | N |
| | cut-off-frequencies
|
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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]* ...
|
|
nfftf_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
|
|
float * | x |
| | nodes (in time/spatial domain)
|
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float * | v |
| | nodes (in fourier domain)
|
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float * | c_phi_inv |
| | precomputed data, matrix D
|
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float * | 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
|
|
fftwf_complex * | F |
|
float * | spline_coeffs |
| | input for de Boor algorithm, if B_SPLINE or SINC_2m is defined
|
data structure for an NNFFT (nonequispaced in time and frequency fast Fourier transform) plan with float precision
Definition at line 408 of file nfft3.h.