A Hardware-Efficient Hybrid Approach for Suppression of Multiple Jammers
in GNSS Receivers
Abstract
A majority of modern positioning solutions are based on global
navigation satellite systems (GNSS). These systems provide an exact,
reliable, flexible and cheap solution for the related tasks, like sea
navigation, aviation or the automotive sector. However, they are
vulnerable to deliberate or collateral disturbance by means of jammer or
spoofer signals. Hardening the systems in an environment of ever
increasing demand for reliability is therefore one of the big challenges
in the field. This work presents a solution focused on an analog
beamforming solution, due to its cost effectiveness. A prototype of a
four antenna receiver is shown with a measured jammer suppression of
above 30 dB . The measurement results were obtained in a realistic over
the air scenario. The presented work functions as a proof of concept for
an integrated version to be implemented in future.