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http://dx.doi.org/10.12673/jkoni.2012.16.4.649

GPS AOA Choosing Algorithm in Environment of High-Power Interference Signals  

Hwang, Suk-Seung (Department of Mechatronics Engineering, College of Engineering, Chosun University)
Publication Information
Journal of Advanced Navigation Technology / v.16, no.4, 2012 , pp. 649-656 More about this Journal
Abstract
The Global Positioning System (GPS) is widely utilized for commercial and military applications to estimate the location of the user or object. The GPS suffers from various intentional or unintentional interferers and it requires estimating the accurate angle-of-arrival (AOA) of the GPS signal to suppress interference signals and to efficiently detect GPS data. Since the power of GPS signal is very low comparing with the noise and interference signals, it is extremely difficult to estimate GPS AOA before despreading. Although AOA of GPS signal is usually estimated after despreading, it requires choosing the GPS AOA among results of AOA estimation because they include AOAs of interference and GPS signals when existing high-power interferers. In this paper, we propose the efficient choosing algorithm of the GPS signal among the estimated AOAs. The proposed algorithm compares the estimated results before despreading and after despreading for choosing AOA of GPS signal. Computer simulation examples are presented to illustrate the performance of the proposed algorithm.
Keywords
GPS(Global Positioning System); AOA(Angle-of-Arrival); MUSIC(Multiple Signal Classification); Beamformer;
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