Interference and multipath suppression with space-time adaptive beamforming for safety-of-life maritime applications

Manuel Appel, Andreas Iliopoulos, Friederike Fohlmeister, Emilio Pérez Marcos, Manuel Cuntz, Andriy Konovaltsev, Felix Antreich, Michael Meurer
2019 CEAS Space Journal  
In this work, we present mitigation algorithms to protect GNSS receivers against malicious interference. Maritime applications with an antenna array-based receiver are considered as a use case. A two-stage mitigation algorithm, that tackles multipath and radio frequency interference (RFI), caused by personal privacy devices (PPD) or additive white Gaussian noise (AWGN) interferers is presented. Our approach consists of a pre-whitening step, followed by a space-time adaptive principle component
more » ... nalysis (PCA) beamformer that uses a dimensionality reduction (i.e. compression) method based on Canonical Components (CC) with a bank of signal-matched correlators. The algorithms are capable of suppressing strong RFI and separating highly correlated and even coherent multipath signals, thus achieving a reliable time delay and, therefore, pseudorange estimation performance. Finally, we evaluate and compare the proposed algorithms not only via numerical simulations but also with real data collected from a measurement campaign performed at DLR's maritime jamming testbed in the Baltic sea. A complete description of the test platform and the scenarios is provided.
doi:10.1007/s12567-019-0236-x fatcat:rd4cff6jgnewnlp545cbzpf43q