Multi Channel Radio Frequency Application-Specific Integrated Circuit (RFASIC) for Handheld GPS Receiver Anti Jam Enhancement

The Global Positioning System (GPS) is a vital element in numerous military and commercial applications. It is required that GPS receivers operate efficiently in hostile jamming environments and in the presence of interference caused by multipath. A critical need is the development of a RF Front End ASIC which will enable incorporation of advanced anti-jam techniques such as STAP into handheld GPS receivers. Basic design goals for the RF Front End ASIC are the capability to receive the GPS modernization signals in the L1 and L2 frequency bands, provide multi channel down conversion of the L-band signals to an intermediate frequency (IF) suitable for sampling and digitizing, and provide for the analog-to-digital conversion of the IF signal for subsequent anti-jam processing. RBS Technologies and its subcontractor Wright State University propose to develop an RF Front End ASIC with the required performance to support anti-jam signal processing and maintain compatibility with handheld GPS size and power constraints. Three basic RF Front End Architectures will be analyzed during the Phase I effort with the objective of identifying a frequency plan and combination of analog and digital building blocks that will meet the stringent demands for low noise figure, channel matching, and linearity.