[oc] fft on hardware??or DSP??

[gsg43@rediffmail.com]

 Hi folks,

1. What is the speed of fastest FFT availabe in the market till now?

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?

4. What are the advantages of FFT on FPGA than in DSP?

please give me a layman explanation if possible.
Thanks in advance.

Regards,
gayathri
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