wrote in message
ups.com...
I'm working on a SDR design using the AD9874 to
digitize the IF producing 280 Ksamples/sec and
am trying to size the DSP. I'm leaning towards
the ADSP-BF532 which is a fixed point DSP rated
at 400 MIPS / 800 MMACS and is available in a LQFP
package. I'd like to be able to handle everything
from decoding standard shortwave SSB signals to
broadcast FM stereo signals (including RDS).

1) Any pointers to information which can be used
to size the DSP in terms of MIPS, program RAM,
and data RAM? Something like a minimum of X MIPS
are needed to do a reasonable job handling
broadcast FM stereo signals (which I'm assuming
require more MIPS than SSB) would be useful
to know.

2) Anyone have a specific DSP they favored for
this type of application? Keep in mind I
need the DSP to be in a package I can handle
using home equipment. It would be nice if the
DSP was flexible enough so that it can be used
for general purpose things such as controlling
the keyboard and LCD instead of adding a
microcontroller.

I'm not looking to use a FPGA at this time.

-- John

Can you use one of the blackfin stamp boards ?
http://blackfin.uclinux.org/gf/project/stamp

Digikey sells the BF537 stamp board for US$226
http://www.digikey.com/scripts/DkSea...440505&Site=US

http://www.analog.com/en/prod/0,2877...DSTAMP,00.html

Could always try and make a network interface for controlling the radio.


I'm just starting to look at what I need for getting a similar set up but
A.M
and ssb only for students to use in a lab to introduce them to the bascs of
sdr.

The lecturers want the students to program different modules ,
different types of modulation , encoding and decoding, set different
sampling rates etc They want the students to be able use both c and matlab.

Looks like we'll be using a c6713 dsk as the base
(thanks to TI providing free software)
I just get to assemble/build/integrate what gets specified.

Someone in the faculty has a couple of lyrtech signalwave boards
which they aren't using(been sitting in their filling cabinet for a few
years), have to see if we can prise them off them.
Then see what it costs to get support (need the up to date software).
http://www.lyrtech.com/DSP-developme...signalwave.php




Alex