[hpsdr] Xilinx Code and Oleg Skydan work

[Bob McGwier]

Verilog is verilog.  That said,  the hardware multipliers needed to make 
this fly are in short supply on CPLD's right?

Bob
N4HY


Leon Heller wrote:
> ----- Original Message ----- From: "Bob McGwier" <n4hy at idaccr.org>
> To: "Alex" <harvilchuck at yahoo.com>
> Cc: <hpsdr at hpsdr.org>
> Sent: Wednesday, June 14, 2006 8:14 PM
> Subject: Re: [hpsdr] Xilinx Code and Oleg Skydan work
>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> At the risk of finally proving to myself that I am only talking to 
>> myself,  let me repeat with more emphasis and less math,  what I said 
>> in my last about the Taylor Series DDS.  At its heart, it is a 
>> trivial piece of nothing work done by trig identities .  My daughter 
>> learned these in the seventh grade.   The hype stuff they have added 
>> is the control fixtures to allow you to make changes and settings on 
>> the fly.  This will ONLY work with their boards.  The stuff is not 
>> useful to us.
>>
>> We should do our own verilog design for this and stick it in 
>> opencores and advertise it on the hpsdr web site with about as much 
>> hype as they did.  We can add a second section of correction to the 
>> process and call it  Parabolic Taylor Series Corrected DDS and put 
>> out 2^12 * 2^10 * 2^10 table lookup based corrections and do a 64 bit 
>> accumulator and show the noise floor at -190 dBm.  It will mean as 
>> little as this hype does.
>>
>>
>> I have been a fan of Oleg for a long time (the first note that comes 
>> up in google has my name in it).  His work is brilliant and done on a 
>> shoe string.
>>
>> For some reason,  I still had the URL to a pdf of his synthesizer.  
>> That is STILL ACTIVE.  Download it now before that too disappears.
>>
>> http://skydan.in.ua/T03DSP/Download/SchSynth.pdf
>>
>> There is no copyright or other notice on the schematic.  If we place 
>> it someplace (hpsdr or hamsdr), I insist that we give Oleg full 
>> credit in the blurb.  I would prefer modifying it with adobe pro or 
>> similar tool to have Oleg's name and callsign on it.
>
> What about the code for the CPLD?
>
> 73, Leon
>


-- 
Robert W. McGwier, Ph.D.
805 Bunn Drive
Princeton, NJ 08540
(609)-924-4600
(sig required by employer)



 1150313619.0