Thanks for the nice find Rick. This isn't really anything new...Thompson CSF has been "fooling around" with parallel tone modems and off-shoots of the STANAG/MIL-STD modems for quite a while...and I expect that Marconi, Harris, Rockwell-Collins and others are looking at all this trying to make a better "mouse trap."
The idea of pilot tones is not new nor is QAM64. But what this document highlights to me is the need in amateur radio for some one to "publish" a goal or set of specifications for creation of the "better mouse trap" HF modem. I wish the ARRL, TAPR, RSGB, DARC, etc....anyone would do it. Walt/K5YFW >From: KV9U <[EMAIL PROTECTED]> >Reply-To: [email protected] >To: [email protected] >Subject: [digitalradio] High Data Rate Parallel Modem >Date: Thu, 21 Sep 2006 21:17:57 -0500 > >Here is an interesting paper on parallel modem design using very high >baud rates. One thing that does seem to stand out is the SNR that is >required to make this kind of modem work on HF. This design uses a pilot >tone reference and tubo codes and even with baud rates of ~ 2000 it >attains bps rates of 9600 using 64QAM. This appears to have originated >around 2002. I don't pretend to understand much of the math, but some of >the historical information may be of interest too. > >http://www.argreenhouse.com/society/TacCom/papers98/11_04i.pdf > >73, > >Rick, KV9U Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
