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

Document Type


Presentation Date


Conference Name

Proceedings of the Institute of Navigation (ION) 2013 International Technical Meeting (ITM)

Conference Location

San Diego, CA

Source of Publication

Proceedings of the 2013 International Technical Meeting of The Institute of Navigation

Inclusive pages

146 - 153


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.



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