Thanks a lot! I appreciate that.
"Chandresh Vora" <cvora@mathworks.com> wrote in message
<fr6ihd$odf$1@fred.mathworks.com>...
> Constructing sparse matrices:
>
http://www.mathworks.com/access/helpdesk/help/techdoc/index.
html?/access/helpdesk/help/techdoc/math/f6-43072.html
>
> OR
>
> Search for "sparse" in documentation.
>
>
> "Will " <fogywind@gmail.com> wrote in message
> news:fr686h$ctb$1@fred.mathworks.com...
> > The first to do is to check the help and I've done that
> > very well. I just don't know how to generate a matrix. I
> > know what's the requirements of the matrix.
> >
> > But still thanks a lot.
> >
> > "Chandresh Vora" <cvora@mathworks.com> wrote in message
> > <fr66r8$p2l$1@fred.mathworks.com>...
> >> ---
> >> >> help fec.ldpcenc
> >> LDPCENC LDPC encoder.
> >> L = FEC.LDPCENC(H) constructs an LDPC encoder
object
> > L for a binary
> >> systematic LDPC code with a parity-check matrix H.
> >>
> >> H must be a sparse zero-one matrix. N and N-K are
the
> > number of columns
> >> and the number of rows in H. The last N-K columns
in
> > H must be an
> >> invertible matrix in GF(2).
> >> ...
> >> ---
> >>
> >> As mentioned in help, H must be a sparse matrix. The
help
> > also contains an
> >> example of how to create your own H. Check out help on
> > sparse matrix too.
> >>
> >> ---
> >> >> help sparse
> >> SPARSE Create sparse matrix.
> >> S = SPARSE(X) converts a sparse or full matrix to
> > sparse form by
> >> squeezing out any zero elements.
> >> ...
> >> ---
> >>
> >> HTH,
> >> Chandresh
> >>
> >>
> >> "Will " <fogywind@gmail.com> wrote in message
> >> news:fr4dc6$o1j$1@fred.mathworks.com...
> >> > How could I generate specific LDPC H matrix which
could
> > be
> >> > used by Matlab LDPC toolkit? DVBS2LDPC is 32400*64800
> > while
> >> > I need a 512*1024. Thx.
> >>
> >>
> >
>
>
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