Re: [Discuss-gnuradio] modification of gr-trellis to support, multiple initial and/or final states

[Tim Meehan]

Hi Achilleas

No problem.  Would you like me to update the documentation and submit a patch?


Good luck getting back up and running.

Tim

On 2/28/07, Achilleas Anastasopoulos <address@hidden> wrote:
> Tim,
>
> thanks for the contribution.
> At this point I am gnuradio-less since my hard disk
> failed a couple of days ago...
> but I'll test all the uploaded code as soon as I am
> up and running.
>
> Thanks again,
> Achilleas
>
>
>
> Tim Meehan wrote:
> > Achilleas and Eric,
> >
> > I have attached a patch to trellis_viterbi_X.cc.t,
> > trellis_viterbi_X.i.t and trellis_viterbi_X.h.t
> >
> > This patch allows for multiple initial and/or final states by calling
> > viterbi with a vector for S0 and/or SK.  The call is overloaded so
> > that viterbi can still be called with a scalar.  The two accessor
> > methods for d_S0 and d_SK still work for scalars but just return the
> > first element if S0 or SK are vectors.  I was not sure how to overload
> > this based on return type.
> >
> > I would be happy to write a patch for the test code qa_trellis.py but
> > it does not seem to have a test for viterbi right now.
> >
> > I would also be happy to write a patch for the documentation
> > gr_trellis.xml (was this written by hand or machine generated?)
> >
> > I don't think there was any bounds checking for the scalar call with
> > S0 and SK so I did not add any for the vector call.  i.e. you can call
> > viterbi with a value for SK that is greater than the number of states.
> >
> >
> > Tim
>
>
>
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