Abstract
The performance evaluation of Global Navigation Satellite System (GNSS) device in 3D laboratory measurement environment is gaining increasing importance. Even though GNSS is a mature technology the 3D channel model to be implemented in laboratory environment does not exist due to the challenges encountered in creating controllable and repeatable multipath conditions. This research work is a first step toward the one solution of these problems. In this paper, the GNSS data set recorded with the polarization based measurement system is analyzed. Both Right Hand Circularly Polarized (RHCP) and Left Hand Circularly Polarized (LHCP) antennas are employed so that direct and reflected signals can be acquired simultaneously. The goal of the study is to investigate the characteristics of polarization based reflections, path length of delayed multipath signal, position error, coverage efficiency (mean number of tracked satellites), and the impact of satellite elevation angle on received Signal-to-Noise Ratio (SNR) for a typical multipath environment. Results show that satellite elevation angle, and multipath propagation affect both the position precision measured by the receiver and SNR. Additionally, presented results will serve as basis for the development of 3D GNSS channel model to work for both static and dynamic environments.
Published Version
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