HF Industry Association PowerPoints

Slides from the presentations given at the recent HF Industry Association (HFIA) meeting are now available for download.

Among the presentations is 'Wideband HF Waveform Design for MIL-ST-188-110C' by Eric Johnson that outlines would could be achieved for HF groundwave comms using 256 QAM
3 kHz bandwidth - 16000 bits per second
24 kHz bandwidth - 120000 bits per second
The raw data rate for both waveforms is significantly higher due to error correction overheads.

Also worth looking at are 'Progress in On the Move HF Loop Antenna' by Malcolm Packer and '2G ALE Interoperable Global HF Network developments' by Bonnie Crystal KQ6XA

The HFIA PowerPoints can be downloaded at
http://www.hfindustry.com/meetings_presentations/
2010_feb_hfia.htm