Low bandwidth disaster recovery mesh
software implementation of data over radio using USRP: (missing python scripts can be found on archive.org)
http://www.wu.ece.ufl.edu/projects/wirelessVideo/project/GNU_Radio_USRP/
transmitting hardware (soundcard Left and Right for I/Q out to this thing)
http://www.na0tc.org/Homebrewing%20a%20HF%20Software%20Defined%20Radio_Final_pdf.pdf
actual transmitter schematic:
http://yu1lm.qrpradio.com/HAM%20HF%20SDR%20TRANSMITTER%20YU1LM.pdf
http://yu1lm.qrpradio.com/FINAL%20HF%20SDR%20RECEIVERS%20TRANSMITTER%20YU1LM.pdf
programmable frequency generator:
https://www.sparkfun.com/products/9089
high frequency capable 4066 chip from mouser for above transmitter:
that chip could be used in the same schematic from my previous link by yu1lm to be able to transmit at higher frequencies, probably up to about 200MHz