Rick KN6KB developed an effective busy frequency detector that he included with his implementation of the SCAMP protocol several years ago. A high-level description of SCAMP is available via
<http://www.eham.net/articles/9785> RIck was initially reluctant to develop a busy-frequency detector because he couldn't make it perfect. My contribution was to help him understand that in this domain, perfect is the enemy of good; the resulting effectiveness of his busy frequency detector surprised Rick, as well as the SCAMP beta testers. My understanding is that WINMOR, which Rick characterizes as a descendent of SCAMP, incorporates a descendent of SCAMP's busy frequency detector. I have not seen a technical paper describing Rick's busy frequency detector, much less code that you could borrow, but based on my experience I suspect that Rick would be happy to discuss it with you. 73, Dave, AA6YQ -----Original Message----- From: [email protected] [mailto:[email protected]]on Behalf Of Simon HB9DRV Sent: Thursday, April 08, 2010 2:30 PM To: [email protected] Subject: RE: [digitalradio] Unattended narrow mode transmission "protection" I've seen (but not yet read) references to this in the SDR world. Out of interest what would you have in mind? Simon Brown, HB9DRV http://sdr-radio.com From: [email protected] [mailto:[email protected]] On Behalf Of Dave AA6YQ Busy frequency detection, however, is demonstrably feasible and practical.
