Adaptive anti-jamming algorithm based on the characteristics of the GPS signal

In this paper, a novel adaptive anti-jamming algorithm for Global Positioning System (GPS) is proposed, which uses the characteristics of the GPS signal. Firstly, the interference is suppressed by projecting the received signal onto the interference orthogonal subspace. Then, the interference- free signal is processed by cyclic adaptive beamforming (CAB) algorithm in order to enhance the GPS signal. Additionally, we make a brief analysis of the conjugate cyclic correlation (CCC) matrix under finite snapshots. And in the estimation of CCC matrix we introduce the Hankel approximation method which helps to improve the performance of the proposed algorithm.