ARLA/CLUSTER: Reino Unido: Transmissões de video e dados em 80m

[João Gonçalves Costa]

80m ham radio band used for wideband video/data

Trials in the UK have used 3.613 MHz for 24 kHz bandwidth high-speed data and video transmissions

In recent years there has been increasing military interest in high-speed data on HF.

By using modern modulation techniques a SSB channel can support a raw data rate of 12800 bps and wider transmissions can support proportionally faster data rates. Trials have shown that color video at 15 frames per second can be streamed on HF in a bandwidth of just 18 kHz. That is the type of bandwidth that may be accommodated in the amateur radio 29 MHz band.

In the UK HF trials have taken place between Blandford and Portsmouth (Portsdown), and Arbroath and Portsmouth. They used frequencies, licensed by Ofcom, of 3.613, 6.390, 7.975 and 13.047 MHz with bandwidths up to 24 kHz and power up to 400 watts.

Information on these trials can be seen at
http://www.hfindustry.com/meetings_presentations/presentation_materials/2012_sept_hfia/presentations/RC_WBHF_UK_Trial_2012.pdf
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