> >
> > 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@rediffmail.com [mailto:gsg43@rediffmail.com]
> Sent: 2001Äê9ÔÂ21ÈÕ 6:02
> To: cores@opencores.org
> 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
> >
> --
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