The paradigm changing Long Range Acoustic Communications System (LoRACS) is proposed to provide the Navy with the capability to reliable alert and control pre-deployed UUVs in an on-shelf environment. Using environmental adaptability, innovative featureless signals capable of being reliably detected and decoded at very low SNRs and innovative transmit and receive arrays, the LoRACS provides reliable communications at ranges of up to 200 km in an up-shelf propagation environment and 100 km in an along-shelf environment. The embedded LoRACS will be implemented on the Integrated Reconfigurable Intercommunications and Sensing (IRIS) Platform with the receive hardware fitting comfortably within the space of a 10-inch long payload section of a Navy medium-class UUV. The modeling and performance prediction capability of JPAnalytics' Array Simulation 3D (ArSIM3D) environment coupled with advanced ocean process modeling will provide the inputs to trade-studies to optimize the parameters of the different modules (hardware and software/algorithmic) of the LoRACS.
