Implementation of FPGA-Based Acquisition of Weak GPS Signals

INTRODUCTION With the wider applications of GPS, higher technical requirements for navigation performance have been brought up. A new method based on FPGA is presented and tested to determine its acquisition performance in environments such as in the urban canyons, tunnels and inside buildings. The motivation for this work is to demonstrate that software GPS receiver, which has become the focus of experts in recent years for its operational flexibility and systematic compatibility, can acquire very weak signals efficiently. Such technologies offer an attractive route to the development of quick positioning technology for high-sensitivity software GPS receiver under shadowed conditions in the future.