I saw your request and came across this link.
http://www.esi.us.es/~melus/gwlham.html
Don't know if this web site has the level of what you want
but it looks worth spending some time perusing through.
It has a lot of links about different RF modem solutions
Fred Finster WB7ODY
e-mail: [EMAIL PROTECTED] Web Site
http://members.aol.com/fredf/
Tech Staff Engineer (408) 588-5726 FAX (408) 588-5464
NEC Electronics Windows CE Architecture Labs
2880 Scott Blvd. M/S SC2202
PO BOX 58062
Santa Clara CA 95052-8062