[Bug 223429] math/nfft 3.3.2: Nonequispaced fast Fourier transform

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Nov 4 16:07:25 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223429

            Bug ID: 223429
           Summary: math/nfft 3.3.2: Nonequispaced fast Fourier transform
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: mike.d.ft402 at gmail.com

Created attachment 187728
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=187728&action=edit
math/nfft

/!\ At present this requres a patched libm to fix the missing cpow function:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221341

NFFT is a software library, written in C, for computing non-equispaced fast
Fourier transforms and related variations. It implements the following
transforms:

1. Non-equispaced fast Fourier transform (NFFT)
 - forward transform (NFFT), i.e. frequency to time/space domain
 - adjoint transform (adjoint NFFT), i.e. time/space to frequency domain

2. Generalisations
 - to arbitrary nodes in time and frequency domain (NNFFT)
 - to real-valued data, i.e. (co)sine transforms, (NFCT, NFST)
 - to the sphere S^2 (NFSFT)
 - to the rotation group (NFSOFT)
 - to the hyperbolic cross (NSFFT)
3. Generalised inverse transformations based on iterative methods, e.g.
   CGNR/CGNE

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