Re: selection of Fpga

kumari wrote:
Hi
i'm new to using Fpga.My project is design of modulator using Fpga based
on Dsp technology.My data rate is 12Mb and Intermeadiate freq is 140
Mhz.
I decided to use D8psk modulation technique. i want to choose Fpga for
this design.which parameters have to be considered for choosing fpga.


You may want to cross-post this question to the fpga newsgroup (I trust you haven't multiple-posted).

Scratch out your modulator design as a block diagram, then look at the arithmetical operations you're going to be doing and the sampling rate you feel you need to achieve. I suspect there will be a substantial number of multiplies, with some phase-to-sine conversions. This would imply you want an FPGA that has multiplier blocks and memory blocks -- fortunately these are easy to come by.

Then go looking for an FPGA that's easy to work with. I can't help you here -- my little bit of experience with FPGAs is with Xilinx parts and it's a few years old now. Moreover my choice had more to do with having a local circle of friends that includes more people with practical Xilinx experience than with other parts, and because the local Xilinx app engineer is a friendly and helpful guy.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
.

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