Design Considerations for a WARP-Based Real-Time Software-Defined GPS Receiver

Jeremy L. Hershbergeer, Elizabeth A. Thompson, Timothy S. Loos

Abstract:	This paper presents an architecture for a real-time software-defined GPS receiver based on the Wireless- Open Access Research Platform (WARP) which was developed by Rice University. The hardware options available on the WARP are examined to determine the best interface to a GPS antenna. Since the WARP utilizes a Xilinx Virtex 4 FPGA with embedded PowerPC microprocessor, the design flow for the development of firmware and software for the WARP is presented. The sampling rate considerations, acquisition methodology considerations and tracking methodology considerations are all examined with an emphasis on maintaining realtime performance. For the final computation of the navigational solution, integration with an existing opensource software-defined GPS receiver is proposed.
Published in:	Proceedings of the 2013 International Technical Meeting of The Institute of Navigation January 29 - 27, 2013 Catamaran Resort Hotel San Diego, California
Pages:	146 - 153
Cite this article:	Hershbergeer, Jeremy L., Thompson, Elizabeth A., Loos, Timothy S., "Design Considerations for a WARP-Based Real-Time Software-Defined GPS Receiver," Proceedings of the 2013 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2013, pp. 146-153.
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