Low-Power, Software Defined Global Positioning System (GPS) Receiver

A key component of the Global Positioning System (GPS) modernization is in advanced receiver technology. The NAVSYS GNSSƒÝSDR receiver is based on Software Defined Radio (SDR) technology providing the ability to easily adapt the signal processing algorithms in a GNSSƒÝSDR receiver for future GPS signals without changing or modifying the hardware of the GPS receiver. NAVSYS has addressed the difficulties associated with the implementation of a miniaturized, low power, portable GPS SDR through the use of a low power reconfigurable FPGA and custom RF front end capable of processing the GPS civilian and military signals in real-time. Under this Phase II project, NAVSYS will build and test a flexible, low power GNSS GPS SDR capable of supporting current and future GNSS signals as well as incorporating advanced multipath mitigation and anti-jam capability. The NAVSYS GNSSƒÝSDR testbed will be used to demonstrate these key innovations using a combination of simulated GPS signals and live GPS satellite testing. BENEFIT: GNSS£gSDR will provide flexible signal tracking that allows the use of both the civil and military GPS signals and can be upgraded to include other GNSS services to improve robustness. The NAVSYS GNSS£gSDR advanced algorithm implementation enables multipath mitigation and anti-jam benefits. The field upgradable capability of GNSS£gSDR allows low cost introduction of new features into systems. These benefits will result in lower costs, improved operation in urban environments and enhanced operations in jamming environments.