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High resolution jamming detection in...

Moussa, Mohamed.

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High resolution jamming detection in global navigation satellite systems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	High resolution jamming detection in global navigation satellite systems./
作者:	Moussa, Mohamed.
面頁冊數:	181 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.
Contained By:	Dissertation Abstracts International78-01B(E).
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10155216
ISBN:	9781369103014

High resolution jamming detection in global navigation satellite systems.
Moussa, Mohamed.

High resolution jamming detection in global navigation satellite systems. - 181 p.

Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.

Thesis (Ph.D.)--Queen's University (Canada), 2015.

Global Positioning System (GPS) is increasingly threatened by interference and especially jamming. They are substantial threats to the functions that rely on the GPS position velocity and time solutions. The ultimate objective of this thesis is to enhance GPS receivers' anti-jamming abilities. Particular focus is given to the detection of Continuous Wave (CW) jamming signals that are close-by in frequency and in space. To tackle the challenge, two high resolution signal processing methods are proposed for single antenna receivers and for antenna array receivers. The first method operates in the frequency domain and targets accurate and efficient detection and frequency estimation of single and multiple in-band CW jammers that lie between two FFT frequency lines. This is achieved by utilizing high resolution spectral estimation that is based on orthogonal search. On the other hand, the second method operates in the space domain to estimate the Direction of Arrivals (DoA) of the jamming signals. Unlike conventional DoA estimation methods that have a low resolution and fail to detect multiple close-by jammers, the proposed method utilizes Fast Orthogonal Search (FOS) for nonlinear modelling to accurately detect the presence of multiple neighboring jammers and estimate their DoAs efficiently and accurately.

ISBN: 9781369103014Subjects--Topical Terms:

649834
Electrical engineering.

High resolution jamming detection in global navigation satellite systems.
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245 1 0 $a High resolution jamming detection in global navigation satellite systems.
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500 $a Source: Dissertation Abstracts International, Volume: 78-01(E), Section: B.
500 $a Adviser: Aboelmagd Noureldin.
502 $a Thesis (Ph.D.)--Queen's University (Canada), 2015.
520 $a Global Positioning System (GPS) is increasingly threatened by interference and especially jamming. They are substantial threats to the functions that rely on the GPS position velocity and time solutions. The ultimate objective of this thesis is to enhance GPS receivers' anti-jamming abilities. Particular focus is given to the detection of Continuous Wave (CW) jamming signals that are close-by in frequency and in space. To tackle the challenge, two high resolution signal processing methods are proposed for single antenna receivers and for antenna array receivers. The first method operates in the frequency domain and targets accurate and efficient detection and frequency estimation of single and multiple in-band CW jammers that lie between two FFT frequency lines. This is achieved by utilizing high resolution spectral estimation that is based on orthogonal search. On the other hand, the second method operates in the space domain to estimate the Direction of Arrivals (DoA) of the jamming signals. Unlike conventional DoA estimation methods that have a low resolution and fail to detect multiple close-by jammers, the proposed method utilizes Fast Orthogonal Search (FOS) for nonlinear modelling to accurately detect the presence of multiple neighboring jammers and estimate their DoAs efficiently and accurately.
520 $a Investigation of the proposed methods' performance is conducted on GPS signals obtained using a Spirent GSS 6700 GPS simulator. The proposed frequency domain method outperformed FFT in terms of number of jamming signals detected and the accuracy of their frequencies' estimation at up to a tenth of the required FFT window size. The proposed spatial domain method was implemented on antenna array geometries such as Uniform Linear Array (ULA), Uniform Circular Array (UCA) and optimized UCA. Performance was compared to predominant DoA estimation methods such as the Classical method and Multiple Signal Classification (MUSIC). The proposed method yields higher accuracy jammer DoA estimates in addition to accurately and correctly estimating jammer amplitudes due to the immunity to noise.
520 $a The research conducted in this thesis contributes to the enhancement of GPS anti-jamming systems in both frequency and spatial domains. It increases the robustness of single antenna receivers and improves theirs anti-jamming ability by providing accurate estimates of multiple jammers whose frequencies are close-by. Additionally, for multi-antenna systems, the accurate estimation of the number of multiple close-by jammers and their DoAs significantly improves the anti-jamming process by limiting erroneous spatial attenuation of GPS signals arriving from an angle close to the jammer.
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793 $a English
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