Adjustable Frequency Diversity Acoustic Communications System.
Patent, Filed 13 Dec 88, patented 21 May 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An underwater acoustic communication system provides an operator with adjustable frequency diversity so that data rates may be tailored to specific multipath environments. Transmitted messages are sent with precursor transmissionreception synchronization data and transmission parameter data so that the receiving communication end will recognize when message data starts, tone length as-well-as the frequency diversity of the transmitted message. Timing is extracted from the data to compensate for Doppler shift.
- Non-Radio Communications