FPGA Central

I am thinking of programming a dsp development board (no particular model
chosen yet) to implement an RLS adaptive filter but with a Volterra Series
front end to provide an adaptive non-linear equaliser. If this doesn't mean
anything to you, take a look at IEEE Trans on Sig Proc Vol 41 No 3 March
1993.

If I use a second order Volterra Series would this be computationally too
great to achieve in real time (my application only needs a sampling rate of
1kHz as I am dealing with low frequency information).

Any ideas... Any recommendations for a DSP development board with a C
compiler...

In article bm36cl$rqe$[email protected], Andrew N Rimell at
[email protected] wrote on 10/09/2003 04:31:

> I am thinking of programming a dsp development board (no particular model
> chosen yet) to implement an RLS adaptive filter but with a Volterra Series
> front end to provide an adaptive non-linear equaliser. If this doesn't mean
> anything to you, take a look at IEEE Trans on Sig Proc Vol 41 No 3 March
> 1993.

trying to use Volterra to model a valve guitar amp?

> If I use a second order Volterra Series would this be computationally too
> great to achieve in real time (my application only needs a sampling rate of
> 1kHz as I am dealing with low frequency information).

how much memory (in ms or samples) does your Volterra Series have. that's
just as important (in terms of computational cost) as order.

> Any ideas... Any recommendations for a DSP development board with a C
> compiler...

they don't seem to do cheap ($200 or $300) DSP boards anymore. maybe some
kinda SHArC board. ADI sells a C compiler to go with the SHArC. i gave up
being a Motorola partisan since the millenium.

r b-j

Answers embedded into questions as appropriate...

"robert bristow-johnson" <[email protected]> wrote in message
news:BBAAA0A0.45EE%[email protected]..
> In article bm36cl$rqe$[email protected], Andrew N Rimell at
> [email protected] wrote on 10/09/2003 04:31:
>
> > I am thinking of programming a dsp development board (no particular
model
> > chosen yet) to implement an RLS adaptive filter but with a Volterra
Series
> > front end to provide an adaptive non-linear equaliser. If this doesn't
mean
> > anything to you, take a look at IEEE Trans on Sig Proc Vol 41 No 3 March
> > 1993.
>
> trying to use Volterra to model a valve guitar amp?

No, I'm trying to model the vibration on a mechanical system

>
> > If I use a second order Volterra Series would this be computationally
too
> > great to achieve in real time (my application only needs a sampling rate
of
> > 1kHz as I am dealing with low frequency information).
>
> how much memory (in ms or samples) does your Volterra Series have. that's
> just as important (in terms of computational cost) as order.

In my simulations I have used N = 10, which for a second order series gives
a length of 110 samples

>
> > Any ideas... Any recommendations for a DSP development board with a C
> > compiler...
>
> they don't seem to do cheap ($200 or $300) DSP boards anymore. maybe some
> kinda SHArC board. ADI sells a C compiler to go with the SHArC. i gave
up
> being a Motorola partisan since the millenium.
>
> r b-j
>