GPS-Denied Navigation Aided by Synthetic Aperture Radar Using the Range-Doppler Algorithm

Abstract

The popularity of using light aircraft such as UAVs is growing in a variety of applications from military use to urban consumer use. Regardless of the application, precision navigation is necessary and usually dependent on a global navigation satellite system (GNSS). Unfortunately, such systems, such as GPS, are easily denied. GPS can, for example, be jammed or spoofed either accidentally or intentionally. It can also be obscured or subject to multipath in the presence of natural or manmade structures obscuring the sky. The ease at which GPS can be denied motivates the field of GPS-denied navigation.GPS-denied navigation can be accomplished in a variety of ways and typically involves an inertial navigation system supplemented by auxiliary sensors such as cameras, lidar, radar, etc. (Balamurugan et al., 2016). These supplementary sensors provide measurements that replace information lost by GPS denial. Some current research explores the feasibility of using synthetic aperture radar (SAR) as an

Quality of Service Based Radar Resource Management for Navigation and Positioning

“…To enable the use of radar as a global navigation sensor, targets with a known position are required. It is possible to use landmarks for that and then navigate with the help of synthetic aperture radar (SAR) images [2], [3]. Another way is to use the reflections of moving targets with known trajectories.…”