DocumentCode :
1787588
Title :
A GNSS structural interference mitigation technique using antenna array processing
Author :
Daneshmand, Saeed ; Jafarnia-Jahromi, Ali ; Broumandan, Ali ; Lachapelle, Gerard
Author_Institution :
Position Location & Navig. (PLAN) Group, Univ. of Calgary, Calgary, AB, Canada
fYear :
2014
fDate :
22-25 June 2014
Firstpage :
109
Lastpage :
112
Abstract :
Position solutions provided by Global Navigation Satellite Systems (GNSS) can be completely misled by structural interference or spoofing threats. An approach utilizing an antenna array is proposed in order to suppress spoofing attacks. The proposed method is based on the assumption that all spoofing signals are transmitted from a single point source. A spatial domain processing technique is proposed to extract the spoofing signal steering vector and consequently to discard the spoofing signals. This method is implemented before despreading and acquisition stage of a GNSS receiver. Hence, it does not impose a heavy computational load on the receiver operational process since it does not require any extensive search in the code and Doppler domains to separately despread individual authentic and spoofing signals. Moreover, the proposed method does not require any antenna array calibration process. This pre-despreading interference mitigation technique is further extended to maximize signal-to-noise ratio (SNR) of each individual authentic GNSS signal. Simulation results show that the proposed method effectively countermeasures spoofing attacks for a wide range of received spoofing power.
Keywords :
antenna arrays; array signal processing; interference suppression; radiofrequency interference; satellite antennas; satellite navigation; signal detection; telecommunication security; Doppler domains; SNR; antenna array calibration process; authentic GNSS signal; global navigation satellite systems; position solutions; pre-despreading interference mitigation technique; receiver operational process; signal-to-noise ratio; spatial domain processing technique; spoofing attack suppression; spoofing signal steering vector extraction; spoofing threats; structural interference mitigation; Antenna arrays; Arrays; Correlation; Global Positioning System; Receivers; Signal to noise ratio; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop (SAM), 2014 IEEE 8th
Conference_Location :
A Coruna
Type :
conf
DOI :
10.1109/SAM.2014.6882352
Filename :
6882352
Link To Document :
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