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Tsinghua Science and Technology  2019, Vol. 24 Issue (2): 216-225    doi: 10.26599/TST.2018.9010125
    
Efficient Signal Separation Method Based on Antenna Arrays for GNSS Meaconing
Jiaqi Zhang, Xiaowei Cui*, Hailong Xu, Sihao Zhao, Mingquan Lu
∙ Jiaqi Zhang, Xiaowei Cui, Hailong Xu, Sihao Zhao, and Mingquan Lu are with the Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. E-mail: zhang-jq15@mails.tsinghua.edu.cn; xuhl07@gmail.com; zsh_thu@mail.tsinghua.edu.cn; lumq@mail.tsinghua.edu.cn.
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Abstract  

As an effective deceptive interference technique for military navigation signals, meaconing can be divided into two main types: those that replay directly and those that replay after signal separation. The latter can add different delays to each satellite signal and mislead the victim receiver with respect to any designated position, thus has better controllability and concealment capability. A previous study showed there to be two main spatial processing techniques for separating military signals, whereby either multiple large-caliber antennas or antenna arrays are used to form multiple beams that align with all visible satellites. To ensure sufficient spatial resolution, the main lobe width of the antenna or beam must be sufficiently narrow, which requires the use of a large antenna aperture or a large number of array elements. In this paper, we propose a convenient and effective signal separation method, which is based on an antenna array with fewer elements. While the beam of the array is pointing to a specified satellite, the other satellite signals are regarded as interference and their power is suppressed to a level below the receiver’s sensitivity. With this method, the number of array elements depends only on the number of visible satellites, thus greatly reducing the hardware cost and required processing capacity.



Key wordsGNSS meaconing      antenna array      beamforming      signal separation     
Received: 11 November 2017      Published: 29 April 2019
Corresponding Authors: Xiaowei Cui   
About author:

Mingquan Lu is a professor in the Department of Electronic Engineering at Tsinghua University. He received the ME and PhD degrees from University of Electronic Science and Technology, China. His research interests include wireless network, satellite communication and navigation, and signal processing.

Cite this article:

Jiaqi Zhang, Xiaowei Cui, Hailong Xu, Sihao Zhao, Mingquan Lu. Efficient Signal Separation Method Based on Antenna Arrays for GNSS Meaconing. Tsinghua Science and Technology, 2019, 24(2): 216-225.

URL:

http://tst.tsinghuajournals.com/10.26599/TST.2018.9010125     OR     http://tst.tsinghuajournals.com/Y2019/V24/I2/216

Fig. 1 Basic principle of GNSS meaconing.
Fig. 2 Proportion of the number of visible satellites.
Fig. 3 Frequency histogram and cumulative distribution curve of the angle between any two satellites.
Fig. 4 Framework of the meaconing simulation platform.
PRN number
2815182126
Elevation ()25.7022.2664.0811.1429.7074.23
Azimuth ()139.1555.32216.92275.90309.8767.44
Table 1 PRN numbers and spatial directions of the satellite signals.
Fig. 5 DOAs of the satellite signals.
Fig. 6 Geometry of the 12-element rectangular array.
Longitude ()Latitude ()Altitude (m)
Meaconer40.609116.077100
Victim receiver40.009116.27720
Designed position42.209116.47720
Table 2 Position parameters in the meaconing scenario.
Fig. 7 Acquisition results of the receiver.
Fig. 8 Acquisition results of six channel signals.
Fig. 9 Acquisition results of the target receiver.
Fig. 10 Positioning results of the target receiver.
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