Olivia Multi-Frequency Shift Keying (MFSK) is a text-based radio communications protocol designed to work even with a low signal-to-noise ratio plus multi-path propagation conditions on shortwave bands. Olivia is used primarily by the amateur radio community. This digital signal can still be properly copied when it is buried 10 dB below the noise floor (i.e. when the amplitude of the noise is just over 3 times that of the signal).

The protocol was developed at the end of 2003 by Pawel Jalocha. The first on-the-air tests were performed by two radio amateurs, Fred OH/DK4ZC and Les VK2DSG on the Europe-Australia path in the 20-meter amateur band. The tests proved that the protocol works well and can allow regular intercontinental radio contacts with as little as one watt RF power. Since 2005 Olivia has become a standard for digital data transfer under white noise, fading and multi-path, flutter (polar path) and auroral conditions.

See: Technical Details on Olivia MFSK Digital Mode

See: Common Frequencies on Shortwave (High Frequencies)

See: Discussion Groups and Resources

Stay tuned!  More information is coming!