Reply by Andrew N Rimell●October 9, 20032003-10-09
Answers embedded into questions as appropriate...
"robert bristow-johnson" <rbj@surfglobal.net> wrote in message
news:BBAAA0A0.45EE%rbj@surfglobal.net...
> In article bm36cl$rqe$1@sun-cc204.lut.ac.uk, Andrew N Rimell at
> A.N.Rimell_no_spam_@lboro.ac.uk 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 $300) DSP boards anymore. maybe some
> kinda SHArC board. ADI sells a C compiler to go with the SHArC. i gave
up
> being a Motorola partisan since the millenium.
>
> r b-j
>
Reply by robert bristow-johnson●October 9, 20032003-10-09
In article bm36cl$rqe$1@sun-cc204.lut.ac.uk, Andrew N Rimell at
A.N.Rimell_no_spam_@lboro.ac.uk 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
Reply by Andrew N Rimell●October 9, 20032003-10-09
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...