Anti-Jamming GNSS Antenna Array Receiver with Reduced Phase Distortions Using a Robust Phase Compensation Technique

• Published in: Remote sensing (Basel, Switzerland) Switzerland), 2023-09, Vol.15 (17), p.4344
• Main Authors: Li, Song, Wang, Feixue, Tang, Xiaomei, Ni, Shaojie, Lin, Honglei
• Format: Article
• Language: English
• Subjects: Accuracy; Adaptive algorithms; adaptive array processing; Adaptive filters; Algorithms; Analysis; antenna array; Antenna arrays; Antennas; Antennas (Electronics); anti-jamming; Bias; Communications equipment; Compensation; Global navigation satellite system; GNSS receiver; Jamming; Kalman filters; Methods; Phase distortion; Phase measurement; Receivers; Receivers & amplifiers; Remote sensing; Robustness; Signal processing
• ISSN: 2072-4292; 2072-4292
• DOI: 10.3390/rs15174344

Antenna arrays with adaptive filtering can protect the integrity and functionality of global navigation satellite system (GNSS) receivers against interference. However, a major problem with existing adaptive array processing algorithms is that they cause phase distortions and introduce bias errors into the carrier phase measurement, limiting high-precision applications. In this paper, a robust phase compensation technique is proposed to reduce the phase distortion. First, a phase bias detection method is developed to trigger the phase compensation technique. Then, the phase bias is estimated using a robust estimation method and compensated for in the GNSS receiver. The proposed technique operates in real time and causes no processing delay, while requiring only a minor modification to existing GNSS receivers. This technique is applied to the power inversion adaptive antenna, and can also be extended to a wide variety of adaptive antennas. The simulation experiments verify the applicability of the proposed technique and also confirm its superiority over existing techniques.