Suppression of Jammer Multipath in GNSS Antenna Array Receiver

Abstract

Interference multipath is an important factor to affect the anti-jamming performance for the global navigation satellite system (GNSS) antenna array receiver. However, interference multipath must be considered in practical application. In this paper, the antenna array model for interference multipath is analyzed, and an equivalent model for interference multipath is proposed. According to the equivalent interference multipath model, the influence of interference multipath on anti-jamming performance is analyzed from the space only processing (SOP) and space-time adaptive processing (STAP). Interference multipath can cause loss of the degree of freedom (DoF) of SOP. Through analysis of the equivalent model and STAP mechanism, it further reveals how the STAP can solve the interference multipath. The simulation experiments prove that the equivalent model is effective, and the analysis conclusion is correct. This paper also points out that the interference bandwidth is wider and more taps in STAP are required, under the same experiment conditions.

Optimization of Basepoint Configuration in Localization of Signal Interference Device

“…In addition, there are new GEMSs consisting of several low-cost sensors to monitor GNSS system performance in a specific area (Trinkle et al 2012). The AOA can also be determined at each basepoint using antenna arrays; see Trinkle et al (2012) for mathematical modeling and estimation of AOA from these arrays (Trinkle et al 2012;Huang et al 2022).…”

Comparing the Performances between Adaptive Notch Filter Direct and Lattice Forms Structures for Mitigation Jamming Signals

“…Then after substituting Equation (11) into Equation ( 9) and Equation (12) to Equation (10), Equations ( 9)-( 10) become…”

“…[10] proposed a cascaded interference and multipath suppression method using an array antenna. Also, the antenna array model was proposed for interference multipath [11]. However, the major drawback of these methods is high computational complexity and incurred hardware.…”

Performance analysis of repeater spoofing suppression based on GNSS multi-beam receiver

“…With the rapid development of satellite navigation technology, satellite navigation systems have gradually expanded from the military field to the civilian field, penetrated into all sectors of the national economy, and become an important part of the national PNT (Positioning, Navigation and Timing) system [1][2][3]. And with the concept of Navigation Warfare (NAVWAR) proposed [4], the research on satellite navigation system jamming and anti-jamming technology is receiving a growing number of attention, according to different processing domains, anti-jamming can be carried out from timefrequency domain [5,6], spatial domain [7,8] and mixed domain, among which the airspace anti-jamming using beamforming technology is currently the most effective [9,10]. The multi-beam anti-jamming receiver is a GNSS receiver that uses the spatial antijamming technology in the front end.…”