Advances in spread spectrum communications systems have provided military and other users with readily available low-probability-of-intercept transceivers for secure, clandestine communications. The use of these systems may constitute a threat to Special Operations Forces. These forces need a system to detect, identify, locate, and copy modern LPI communication emitters to counter this threat. The system must be capable of deployment with ground forces, in maritime operations, in a support role on aircraft, or left behind for remote operation. Radix proposes to design an effective search system for threat LPI emitters to satisfy this need in a rugged, low power, small form factor, 100% COTS hardware architecture. The proposed system architecture uses the DRT receiver family. Radix algorithms, which have successfully operated against LPI signals on other programs, are integrated on COTS hardware processing nodes in a flexible, reconfigurable firmware/software design compatible with the JCAF. The processing nodes are specifically structured to expedite upgrades for signal variants or new signal types, to be scaleable by adding additional nodes in a larger receiver configuration, and to take advantage of technology upgrades as higher capacity programmable devices and faster processors become available. The primary opportunity for this technology is initially with the US military. Since the processing is sophisticated enough to allow operations in high density environments, the technology can be deployed in high altitude aircraft as well as in the air, maritime, and land tactical missions addressed in this proposal. The modularity necessary to scale the processing for signal density, SOI type, and bandwidth coverage allows a wide range of military applications. Use of standards-based hardware interfaces and JCAF software principles to aid platform and operating system independence provides the flexibility to fit into a variety of surveillance products by other vendors
