Research and implementation of high precision indoor positioning technology for GPS pseudo satellite

Abstract

In order to achieve high-precision indoor positioning and overcome the limitations of GPS navigation system indoor or other complex environments, a high-precision indoor positioning scheme based on pseudo satellite is proposed. FPGA+DSP are used as the core processor, and high-speed A/D conversion circuit and up and down converter circuit are integrated. The design and implementation of pseudo satellite signal clock synchronization method and near-far effect elimination are introduced in detail. Through the system test, the results show that the indoor static positioning accuracy and dynamic positioning accuracy are both within 3 cm, and the high-precision indoor positioning is realized. The implementation of this scheme is of great significance for indoor and outdoor seamless positioning.

Keywords

• high precision indoor positioning
• pseudo satellite
• time synchronization
• near-far effect