Low cost, lightweight, low power Precise Positioning System (PPS) GPS Solution for Software Defined Radios

Under this proposed effort, NAVSYS will leverage our expertise with developing ultra-low power GPS solutions to develop a software GPS receiver solution that can be embedded in military software defined radios that will be used for handheld, sensors and weapon applications. The objective of this effort is to develop a top-level software design for a lightweight GPS application, “GPS-Lite”, which is capable of performing PPS GPS positioning within a small form factor JTRS radio. We shall focus this effort on developing a design suitable for transition into the JTRS HMS radios that is also extensible to all tactical radio form factors and adaptable to sensor and weapon use. The architecture study performed shall identify the radio resources that will be used by the GPS-Lite application and the software components to be implemented. We will consider methods for partitioning the GPS-Lite functions to optimize use of the processing and security resources within the JTRS HMS to minimize the power required to compute a GPS PPS fix. We will also perform lab testing to validate the processor and relative power consumption requirements and develop a plan to build an unclassified prototype of the GPS-Lite application under Phase II for test and evaluation.