DIGITAL ENCODED ACOUSTIC TRANSPONDER - TORPEDO DATA LINK

THERE IS A REQUIREMENT FOR RELIABLE, SECURE COMMUNICATION BETWEEN A SUBMARINE AND TORPEDO. THIS PROPOSAL DESCRIBES A NEW SYSTEM CONCEPT FOR DIGITAL ACOUSTIC DATA TRANSMISSION BASED ON SPREAD SPECTRUM CODED ACOUSTIC SIGNAL TRANSMISSION. THE FINAL GOAL OF THIS SYSTEM DEVELOPMENT WILL BE PRODUCTION OF A LOW COST ACOUSTIC MODEM DEVICE WHICH HAS A LONG OPERATING LIFE, IS SMALL, LIGHT IN WEIGHT, AND VERY SECURE FROM INTERFERENCE FROM AN UNAUTHORIZED SOURCE. IN ADDITION TO PROVIDING AN IMPROVED COMMUNICATION TECHNIQUE, THE UNIQUE DIGITAL ACOUSTIC MODULATION SCHEME SUGGESTS MANY OTHER APPLICATIONS WHERE SECURE, CODED DATA MUST BE TRANSMITTED THROUGH THE WATER FROM ONE INSTRUMENTATION PACKAGE TO ANOTHER. THE GOAL OF PHASE I IS TO PROVIDE PROOF OF CONCEPT FEASIBILITY AND TO PROVIDE A DETAILED SYSTEM DESIGN FOR PROTOTYPE HARDWARE CONSTRUCTION TO BE PROPOSED AS PART OF A PHASE II EFFORT.