Joint polarized and spatial domain anti-jamming method for GNSS

Abstract

Because of the vulnerability of navigation signal, adaptive array processing plays a significant role in global navigation satellite system (GNSS) receivers. However, when the direction of arrival (DOA) of the desired signal coincides with that of the interference, the desired signal is mitigated which leads to a degradation of system performance. This paper utilizes antenna array's polarization information and proposes a novel joint polarized and spatial anti-jamming (JPSA) method based on linearly constrained minimum variance (LCMV) criterion. Unlike traditional LCMV criterion , we propose a constraint matrix consisting of the steering vector of desired signal and interference, which can suppress the interference and enhance the desired signal effectively. Simulations in single and multiple interference scenarios show that the proposed method suppresses interference successfully while the DOA of desired signal is the same with that of interference.

Exploiting the Sensitivity of Dual-Frequency Smartphones and GNSS Geodetic Receivers for Jammer Localization

“…The effects of smartphone positioning in upright and prone positions were studied by Yong et al [27]. They showed that the choice of smartphone configuration can affect the positioning performance, even at a zero baseline setting, which might be a good starting point for the issue of signal polarization from interferences, i.e., jamming, and spoofing signals studied in [28]. Paziewski et al [14] highlighted that double-frequency smartphones can be affected by frequent cycle-slips, duty-cycling, random initial phase biases (IPBs), and a very noticeable divergence of carrierphase biases between dual-frequency signals.…”

A Novel Power Inversion Antenna Array for the Beidou Navigation Satellite System

“…A complete EMVS consists of three orthogonal electric dipoles to measure all components of the electric field vector and three orthogonal magnetic rings to measure all magnetic field components [21]. These components are redundant so a subset can be chosen to form the EMVS array, such as the bi-orthogonal dipole array [22] or the triorthogonal dipole array [25]. Dipoles or rings can be spatially collocated or non-collocated in an EMVS.…”

“…Deterministic beamforming (DBF) and minimum variance distortionless response (MVDR) beamforming were proposed in [21] to enhance the satellite signal. In [22] and [23], joint space-polarization and space-timepolarization arrays were obtained for bi-orthogonal dipoles as array elements. Both solutions increase the signal to interference plus noise ratio (SINR) when the DOA of the satellite signal is similar to that of the interference, but this DOA is required.…”

An architecture design for anti-jamming circuit with low power and low area cost in high-precision GNSS receiver chip

“…Recently, many anti-jamming technology of GNSS receiver mainly focuses on the space, frequency, time domain solution [3,4]. Additional antenna arrays that are assembled at specific locations are needed in the space domain solution to resolve the jamming issues [5,6,7,8], and the estimation of jamming frequency depends on the parameters of ADC in each antenna. However, in practice, the parameters of ADCs in multi-antenna are different, which makes it difficult to estimate the jamming frequencies accurately [9].…”