access icon free Hybrid anti-jamming approach for kinematic global positioning system receivers

© The Institution of Engineering and Technology
Received 16/05/2017, Accepted 05/04/2018, Revised 07/02/2018, Published 06/04/2018

In this study, a new hybrid anti-jamming system is proposed for kinematic global positioning system receivers. The proposed system employs a short-time Fourier transform (STFT)-based pre-correlation block to guarantee that the receiver can acquire at least four satellites in jamming environments. It also employs a discrete wavelet transform-based denoising block in the navigation unit of the receiver to increase positioning accuracy, which was degraded due to the jamming and also due to the movement of the receiver. Simulation results demonstrate that the proposed system has a better anti-jamming performance compared with previous methods. They show that the average positioning accuracies of the proposed system are 47, 45, and 43% better than the standard STFT-based mitigation method, wavelet-packets transform (WPT)-assisted filter, and WPT-based hybrid system, respectively.

Inspec keywords: correlation methods; radio receivers; signal denoising; jamming; Global Positioning System; Fourier transforms; discrete wavelet transforms

Other keywords: kinematic Global Positioning System receivers; standard STFT-based mitigation method; hybrid anti-jamming approach; receiver navigation unit; WPT-based hybrid system; jamming environments; WPT-assisted filter; short-time Fourier transform-based pre-correlation block; discrete wavelet transform-based denoising block; wavelet-packets transform

Subjects: Radionavigation and direction finding; Signal processing and detection; Integral transforms; Electromagnetic compatibility and interference

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