[hpsdr] Some HPSDR Updates

Wed May 17 08:02:41 PDT 2006

Hi Eric,

There's a lot of very interesting history.  My favorite television program
is "Connections" where the author (I forgot his name?) would show the
connections to inventions throughout history.  Ham radio is no different.
As we research the technical side of this hobby, we see an ever so gradual
development that has us where we are today.  I find it facinating.

The point that is most important is that all this effort needs to be
published.  And that means more that just a web page (as web pages come and
go).  When an idea is in print (any magazine or proceedings) then the
concept lives on.  That's why I pour so much energy into the DCC.  By coming
and presenting you share your ideas with others, get a chance to discuss
with others of like mind, and the papers are publiched in a proceedings.

The next DCC September 15-17, 2006 in Tucson.  See http://www.tapr.org/dcc
for more information.

Sure, it sounds like a sells pitch.  But I'll let others who have attended
tell about their experiences.

Ask Gerald about his experience at the 2002 Denver DCC.  It was him
presenting at that DCC that made him decide to create Flex-Radio and persue
the SDR-1000 commercially.  At the 2003 DCC Gerald was at the TAPR booth and
amazed many a person.  As you know now, Gerald has his own booth and is
growing strong.  That's what the TAPR community is all about.  Helping
others bootstrap amateur inovation.

73,

- Steve, N7HPR
 (n7hpr at tapr.org)

> -----Original Message-----
> From: Eric Ellison [mailto:ecellison at comcast.net]
> Sent: Wednesday, May 17, 2006 5:26 AM
> To: 'Steven Bible'; 'HPSDR List'
> Subject: RE: [hpsdr] Some HPSDR Updates
>
>
> Steve
>
> Yep
>
> I do think it was the first off the shelf transceiver that we could
> purchase. Also say: "although not the only exploration into SDR at the
> time". SDR-1000 certainly has exploded the interest. Carefully worded for
> the blurb, but not intended to mislead.
>
> Obviously SDR HAS been around for quite a while. Also thanks for the
> historic information. I was not trying to belittle earlier efforts but did
> not research it. Actually will be going back and reading! I also have come
> full turn, and am now involved in a non-off the shelf project - HPSDR!
>
> Thanks
> Eric
>
>
> -----Original Message-----
> From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On
> Behalf Of
> Steven Bible
> Sent: Tuesday, May 16, 2006 10:51 PM
> To: 'HPSDR List'
> Subject: Re: [hpsdr] Some HPSDR Updates
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> [snip]
>
> > 12:00 p.m. - 1:45 p.m.
> > SOFTWARE DEFINED RADIO - GROUNDSWELL TO TIDAL WAVE
> >
> > Moderator: Eric Ellison, AA4SW, V31SR
> > Ever since Gerald Youngblood K5SDR published a series of articles in QEX
> > magazine and offered the first, off the shelf SDR transceiver, Ham's
> > worldwide have been forging ahead into the "Future of Radio".
> Although not
> > the only exploration into SDR, at that time, the SDR-1000 and
> GPL PowerSDR
> > open source code has been a major engine to spur new exploration.
> > Once again hams are at the very leading edge of radio.
>
> [snip]
>
> I must say Eric, that SDR experimentation was way before Gerald's QEX
> articles.  If you check out the ARRL's TIS SDR web page at
>
>    http://www.arrl.org/tis/info/sdr.html
>
> I wrote this for Ed and the lab rats.  These are the articles
> that I culled
> from ARRL publications that show early SDR experimentation.  The
> problem was
> that the ARRL insisted on calling these projects "DSP Radio" and not
> software radio.
>
> Rob Frohne, KL7NA, in his article "A High-Performance, Single-Signal,
> Direct-Conversion Receiver with DSP Filtering", in QST April
> 1998, pp. 40-43
> comes as the earliest that was a software radio project.  In 1999
> Bob Larkin
> W7PUA writes about his DSP-10.  The DSP-10 was Bob's third attempt.  He
> actually writes about his first two attempts in Microwave
> Updates.  Over 300
> DSP-10 kits were sold and many taking part in their first
> software (defined)
> radio experience.
>
> What is also most interesting is to look at the code base both gentlemen
> used: it was Johan Forrer, KC7WW's article "Using the Motorola DSP56002EVM
> for Amateur Radio DSP Projects," in QEX Aug 1996, pp 12-20.  Even Johan's
> work was based upon the work of the Finish Alef Null Group (Jarkko Vuori,
> OH2LNS, Kaj Wiik, OH6EH, and others) that started coding in 1992.
>  Here are
> some web pages that document these fellows work:
>
>    http://www.tapr.org/kits_evm56k.html
>
>    http://www.tapr.org/dsp_dsp4.html
>
> The first that I read about Software Radio was the May 1995 IEEE
> Communications Magazine.  Many of the articles authored by Joe
> Mitola.  This
> issue comes up most often when researching about software radio.
>
> Let's not forget the earliest work that these people have done.  They are
> the one's that have got us to where we are today.
>
> 73,
>
> - Steve, N7HPR
>  (n7hpr at tapr.org)
>
>
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