This article considers the unknown measurement noise covariance problem in the nonlinear
situation of a navigation system. Aiming at the contaminated global position system (GPS) …

In ship navigation, the most widely used technology is global navigation satellite systems
(GNSS), which provide the ship's position and velocity continuously over a period of time …

Multipath errors (MP) can seriously affect positioning accuracy. Extracting and analyzing the
variation characteristics of MP can provide a basis for mitigating it, but the current studies …

The traditional receiver employs scalar tracking loops, resulting in degraded navigation
performance in weak signal and high dynamic scenarios. An innovative design of a vector …

In recent years, unmanned surface Vessels (USVs) have increasingly been used for river
monitoring and hydrological surveys. USVs rely on global navigation satellite systems …

High-precision navigation systems are crucial for unmanned autonomous vessels. However,
commonly used Global Navigation Satellite System (GNSS) signals are often severely …

Abstract Global Navigation Satellite Systems (GNSS) are the primary sources of accurate
Position, Navigation, and Time (PNT) information to critical infrastructures. As a result, the …

For the degradation of the filtering performance of the INS/CNS navigation system under
measurement noise uncertainty, an adaptive cubature Kalman filter (CKF) is proposed …

Global Navigation Satellite Systems (GNSS) are the primary providers of precise Position,
Navigation, and Timing (PNT) information for critical infrastructure. Consequently, actively …

In this paper, we propose a joint delay and frequency offset tracking scheme for solving the
high-performance delay and frequency tracking problem of direct sequence spread …