Re: [oc] Any single chip solution for 1024 FFT/IFFT ?

["Andras Tantos" <andras_tantos@yahoo.com>]

Hi!

Xilinx has a core for Virtex IIE (maybe for other chips as well). As far as
I know it can run at around 130MHz.

Is it something you're looking for?
Andras Tantos

----- Original Message -----
From: <haiyun@LegendSilicon.com>
To: <cores@opencores.org>
Sent: Thursday, May 23, 2002 11:08 AM
Subject: [oc] Any single chip solution for 1024 FFT/IFFT ?


> Hi,
>
> i am looking for a single chip solution for 1024-point FFT/IFFT for my
> current project. is there any commerical chip available ? anybody has
> any clue ?
>
> thanks,
>
> haiyun
>
> ----- Original Message -----
> From: Yan Zhang <yzhang@m... >
> To: "'cores@o... '" <cores@o... >
> Date: Fri, 21 Sep 2001 10:35:00 -0700
> Subject: RE: [oc] fft on hardware??or DSP??
>
> > Title: RE: [oc] fft on hardware??or DSP??
> >
> >
> > > >
> > > > The FFT I am designing for opencores should do around 1
> > > > point
> > > > every 10ns in an FPGA. This translates to 10us for 1024
> > > > points.
> > > > Essentially it will be 'real time', allowing a continuous
> > > > stream of data
> > > > to be processed.
> >
> >
> > I also have designed a real time FFT (512 points) logic for 100M
> > ASIC and verified by FPGA. About speed parameter looks like you
> > used at least 8 multipler and number's adders parallel, not
> > pipeline.
> >
> > Thanks
> >
> > Yan
> >
> > > -----Original Message-----
> > > From: gsg43@r...  [mailto:gsg43@r... ]
> > > Sent: 2001Äê9ÔÂ21ÈÕ 6:02
> > > To: cores@o...
> > > Subject: Re: [oc] fft on hardware??or DSP??
> > >
> > >
> > >
> > > Hi John,
> > > Are you implemeting pipelined fft?? The word real time fft is
> > > giving this meaning...
> > > which algorithm you are using and why?
> > > Shall we get enough speed with pipeline fft on FPGA? I mean
> > > routing delays may effect the design...
> > > IF not so which FPGA will be suitable...
> > > Is opencores giving code for free??
> > >
> > > I am trying to get brief idea on the fft implementation... I
> > > am planning to simulate(Integer C code) pipelined fft.
> > > Thank you,
> > > gayathri :-)
> > >
> > > ----- Original Message -----
> > > From: jdalton at asiaonline dot net dot au
> > > To: cores at opencores dot org
> > > CC: jdalton at asiaonline dot net dot au
> > > Date: 17 Sep 2001 21:03:23 -0700
> > > Subject: Re: [oc] fft on hardware??or DSP??
> > >
> > > > > Hi folks,
> > > >
> > > > Hello
> > > >
> > > > > 1. What is the speed of fastest FFT availabe in the
> > > > market till now?
> > > >
> > > > Not sure.
> > > >
> > > > > 2. I have seen few xilinx FFT documents for virtex
> > > > FPGAs saying 1024
> > > > > FFT in arround 60us. Other DSP vendors giving much
> > > > speed FFTs than
> > > > > FPGAs.
> > > > > So which is suitable for fastest FFT, either DSP or
> > > > FPGA or dedicated
> > > > > chip.
> > > > > what are the limitations in both.
> >
> > > >
> > > > > 3. Can I get faster FFTs in FPGA than DSPs?
> > > >
> > > > My guess is for long transforms, an FPGA will generally
> > > > have a higher thoughput, as it can do more in parallel.
> > > > A DSP could potentially have a shorter latency due to
> > > > more highly optimised multipliers. For very short
> > > > transforms
> > > > a DSP with multiple ALUs might be faster than an FPGA as
> > > > it can do
> > > > everything in parallel with optimised multipliers.
> > > >
> > > > > 4. What are the advantages of FFT on FPGA than in
> > > > DSP?
> > > >
> > > > See previous answer.
> > > >
> > > > Best wishes
> > > > John
> > > >
> > > --
> > > To unsubscribe from cores mailing list please visit
> > http://www.opencores.org/mailinglists.shtml
> >
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