Performance Analysis of Adaptive Array Antenna for GPS Anti-Jamming

Jeong, Taehee

doi:2013.16.3.382

J. KIMS Technol > Volume 16(3); 2013 > Article

Journal of the Korea Institute of Military Science and Technology 2013;16(3):382-389.
DOI: https://doi.org/10.9766/KIMST.2013.16.3.382

Performance Analysis of Adaptive Array Antenna for GPS Anti-Jamming

Taehee Jeong

GPS 항재밍을 위한 적응 배열 안테나의 성능 분석

정태희

국방과학연구소

Abstract

In anti-jamming GPS receiver, adaptive signal processing techniques in which the radiation pattern of adaptive array antenna of elements may be adaptively changed used to reject interference, clutter, and jamming signals. In this paper, I describes adaptive signal processing technique using the sample matrix inversion(SMI) algorithm. This adaptive signal processing technique can be applied effectively to wideband/narrowband anti-jamming GPS receiver because it does not consider the satellite signal directions and GPS signal power level exists below the thermal noise. I also analyzed the effects of covariance matrix sample size and diagonal loading technique on the system performance of five-element circular array antenna. To attain near optimum performance, more samples required for calculation covariance matrix. Diagonal loading technique reduces the system nulling capability against low-power jamming signals, but this technique improves robustness of adaptive array antenna.

Key Words: Adaptive Array Antenna, Anti-Jamming, Adaptive Signal Processing, Sample Matrix Inversion(SMI), Diagonal Loading