<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Fri, May 9, 2014 at 11:12 AM, Sid Boyce <a href="mailto:g3vbv@blueyonder.co.uk" target="_blank">g3vbv@blueyonder.co.uk</a> [apache-labs] <span dir="ltr"><<a href="mailto:apache-labs@yahoogroups.com" target="_blank">apache-labs@yahoogroups.com</a>></span> wrote:<br>
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<div style="background-color:#fff"><div><div><div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div><div>So, the future of radio *IS* with the multirate
subband receiver with high-capacity transfer to
multiple back-end processors, not YASHRT. Flex has
their market and HPSDR appeals to people who want to
do newer and more interesting things. OTOH, it is
worth noting that the HPSDR model works in BOTH
markets. Hmmm...</div>
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-- <br>
Brian Lloyd, WB6RQN/J79BPL<br>
706 Flightline Drive
<div>Spring Branch, TX 78070<br>
<a href="mailto:brian@lloyd.com" target="_blank">brian@lloyd.com</a><br>
<span><span title="Call with Google Voice"><a href="tel:%2B1.916.877.5067" value="+19168775067" target="_blank">+1.916.877.5067</a></span>
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Hi Brian,<br>
Thinking beyond and calling for a more radical software approach -
What about using the new SoCFPGA chips from Altera, XilinX and
others.<br></div></div></div></div></blockquote><div><br></div><div>I don't see this architectural discussion as being tied to a particular processing engine. Additional processing just means we can slice and dice the spectrum into more multitrate subbands for our convenience but it doesn't change the basic function. The 'IT' doesn't change, just how much of 'IT' you can do changes. </div>
<div><br></div><div>The key is the right protocol running between the front-end (we need a good name for the thing that has the ADC and does the first-cut at filtering and decimating into the multirate subbands) and the subsequent processing engines. Do it right and you open the world of distributed RF comm applications. </div>
<div><br></div><div>I was thinking about analogies and the one that really hit me a few minutes ago was how we connected our PCs to the Internet for the first time. Initially you ran a terminal program over a modem connection and used the services on a glorified bulletin board like The Source, The Well, or AOL. What ran over the modem was a single baseband session. Then we got PPP and were able to run TCP/IP over the wire. The PC and the modem were the same but now many sessions were multiplexed over the same connection. Your mail, web browsing, file transfers, time synchronization, chatting, etc., were all going on at the same time over the same modem connection in separate sessions. That is where we need to go with our radios. </div>
<div><br></div><div>To me THAT is the difference between YASHRT and HPSDR. </div><div><br></div></div>-- <br>Brian Lloyd, WB6RQN/J79BPL<br>706 Flightline Drive<div>Spring Branch, TX 78070<br><a href="mailto:brian@lloyd.com" target="_blank">brian@lloyd.com</a><br>
<span><span title="Call with Google Voice"><a href="tel:%2B1.916.877.5067" value="+19168775067" target="_blank">+1.916.877.5067</a></span> (USA)</span></div>
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