Investigating the Performance Benefits of Vectorized NavIC Receiver over Federated NavIC Receiver in Semi-Urban Environments

Abstract

The Navigation with Indian Constellation (NavIC) system has created new opportunities for precise positioning across the Indian subcontinent. NavIC receivers are widely used for different applications, including in the autonomous vehicle industry. However, the performance and robustness of these receivers are contingent on satellite geometry, receiver architecture, and navigation environment. In semi-urban canyons with a high probability of signal blockage and/or interference from one or more satellites, scalar tracking (ST)-based NavIC receivers' positioning accuracy degrades. Vector tracking (VT)-based NavIC receivers, on the other hand, display some tolerance to transient outages and interference. Therefore, it is necessary to investigate VT-based NavIC receivers for various applications, particularly safety-critical applications. This study compares a single-frequency (L5/S) vectorized and federated NavIC software receiver in semi-urban environments.