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Re: [Xylo-SDR] FDR?
Before you can run you need to learn how to walk.
Putting the DSP logic in there is a huge step, but a worthy goal.
At 02:44 AM 12/12/2005, you wrote:
Hi Leon, Phil and Phil,
Do we really need to take a truckload of hardware and the
supporting Gigabytes of Bill Gates' or Linus Thorvalds' stuff
(or possibly kilograms of apples) when going portable?
Why not really use FPGA, DSP circuit, DDS, a simple
microprocessor, LCD and few pushbuttons to create a Firmware
Defined Radio (FDR) instead of the SDR? I think, Gerald's
innovating SDR-1000 and the related tedious software exercise
after that has already very well demonstrated (and still
continues to do) the feasibility of totally new radio
By the way, for practical reasons I very much second Phils'
suggestion of supporting PCM4202 and TLV320AIC23B in the XYLO
project (AK5394A would have been marginally better, but ...).
Many thanks to everybody for the great work,
----- Original Message -----
From: "Leon Heller" <firstname.lastname@example.org>
To: "Xylo-SDR Discussion" <email@example.com>
Sent: Monday, December 12, 2005 9:12 AM
Subject: [Xylo-SDR] Cyclone II board
I've decided to take account of the various suggestions and
make my board as general-purpose as possible. It'll have the
bare minimum on it, and consist of a small plug-in module
(four-layer PCB), for use with a motherboard which will have
the ADC mounted on it, and a socket for the SR V5. The
motherboard may even be home-made, for prototyping, and for
use with another ADC or radio front-end. I designed something
like this a few years ago, with an Altera Flex 10K chip on it.
It had a 64-way DIN41612 connector on it, to which I attached
prototyping cards with things like a VGA interface, LED
displays and pushbuttons. I even implemented a very simple CPU
on it, based on one written in VHDL in Hamblen and Furman's
book: Rapid Prototyping of Digital Systems. I did something
similar with a Xilinx Spartan chip.
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"I fail to see why doing the same thing over and over and getting the
same results every time is insanity: I've almost proved it isn't;
only a few more tests now and I'm sure results will differ this time ... "