SoC Implementation of Asynchronous Two-Way Ranging System of Chirp pread Spectrum

Abstract

We implemented the SoC design of a subspace-based two way ranging system with chirp spread spectrum (CSS) modem. The subspace-based TOA estimation algorithms have high accurate estimation ability and have been utilized in most of super-resolution ranging system. For data communication, synchronization algorithms for CSS signal have been implemented in FPGA and subspace-based time delay estimation algorithm have been implemented in software based on reconfigurable NIOS architecture. We verified the ranging system through experiments using prototype ranging system. Measurements in hallway and room are presented.