```>Have you looked at "Adaptive Filter Theory" by Simon Haykin? I have the
>thrid edition and it appears that he has a good selection of various
>adaptive lattice algorithms.  You may be able to cast your problem to
fit
>one of the models in the book.
>

Yes, I have read/have Simons book, Sayed and Honig and many more Adaptive
DSP books.  This is section has been conveniently omitted from the books
without giving any reason.  The problem sounds very trivial but for some
reason no one have solution.

Thanks,
Lalin

```
```>
>>
>>
>>http://scholar.lib.vt.edu/theses/available/etd-4698-201138/unrestricted/etd.pdf
>>
>>
>>
>Thank for the link, again this does not help me since, it is Gradient
>Lattice Algorithm(GAL)these algorithms work on joint estimation
principle.
>The lattice filter is used as a pre-processing(Orthogonalizing unit) to
do
>basic FIR LMS on the backward coefficients. This improves the
convergence
>speed.  I am looking for LATTICE ONLY adaptation.
>

Have you looked at "Adaptive Filter Theory" by Simon Haykin? I have the
thrid edition and it appears that he has a good selection of various
adaptive lattice algorithms.  You may be able to cast your problem to fit
one of the models in the book.
```
```>Check out this link.
>
>
>http://scholar.lib.vt.edu/theses/available/etd-4698-201138/unrestricted/etd.pdf
>
>
>
Thank for the link, again this does not help me since, it is Gradient
Lattice Algorithm(GAL)these algorithms work on joint estimation principle.
The lattice filter is used as a pre-processing(Orthogonalizing unit) to do
basic FIR LMS on the backward coefficients. This improves the convergence
speed.  I am looking for LATTICE ONLY adaptation.
```
```Check out this link.

http://scholar.lib.vt.edu/theses/available/etd-4698-201138/unrestricted/etd.pdf

```
```Hi Andor,
I am unable to find it in google as well as in well known text books!. I
convert the FIR to a unique lattice filter and why can&#2013266066;t we only adapt the
lattice? Is it because we can't find a error criteria at intermediate
stages ?
BTW: GAL algo's use the lattice only as an orthogonalizer so they don't
count.

```
```Lalin wrote:
> Hi,
> I am planning to use a lattice adaptive filter for system identification.
> I am unable to find method to update the km's in the lattice.  What have I
> missed?

```Hi,