Megapulse, Inc.

Per K Enge

Paul R Johannessen

Julian J Bussgang

A method of and apparatus for two-way radio meteor scatter communication amongst mobile transceiver-equipped terminals and fixed meteor scatter base terminal(s) that comprises communicating high volume point-to-point inbound information from the mobile terminals to the base terminal(s) and outbound information from the base terminal(s) to particular mobile terminals by radio meteor scatter, and broadcasting outbound information from the base terminal(s) to many mobile terminals by supplemental Loran communications short messages modulated upon Loran radio positional and navigation transmissions.

Method of and apparatus for two-way radio communication amongst fixed

A Loran-C communications technique and system are disclosed involving appropriate encoding of communication messages and logical multiplication and inversion of encoded signals prior to phase modulation of the Loran-C pulses, with novel bit-flip connections for producing complementary plus and minus modulation position shifts in the first and third and second and fourth, etc., of the Loran-C pulse groups, and with perfect balance irrespective of the nature of the raw data and irrespective of skywave interference.

Method of and apparatus for Loran-C message communication with reduced

In a Loran-C message communication system a method of obviating errors in navigation locking caused by sampling reception at the conventional symmetrical pulse modulation time intervals in advance of and in delay from the normal transmission interval, through rendering the pulse modulation assymetrical to a degree that compensates for different cycle amplitudes at sampling points above and below the desired sixth zero crossing used for navigation position determination.

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Groton, MA, United States of America

Per K Enge