Accurate Interference Mitigation in Global Positioning System Receivers Based on Double-Step Short-Time Fourier Transform

作者：Abedi M.; Rezaei M. J.; Mosavi M. R.^*

来源：Circuits, Systems, and Signal Processing, 2018, 37(6): 2450-2470.

DOI：10.1007/s00034-017-0670-y

• GPS
• Interference mitigation
• Jamming
• Short-time Fourier Transform

The impact of low-power interferences on the performance of global positioning system receivers is ignored in most literature. Low-power interferences degrade the positioning accuracy as well as disrupting the performance of the receiver in some situations. Since the resolution of short-time Fourier transform (STFT)-based jamming mitigation methods is insufficient for both low- and high-power interference mitigation, this paper proposes an interference mitigation method which employs two windows to increase time-frequency (t-f) plane resolution. In this paper, we also propose a new technique to select near-optimum windows in order to increase resolution of the t-f representation. The proposed technique results in significant increase in signal-to-interference-plus-noise power ratio improvement, the number of acquired satellites, and the positioning accuracy as well as considerable decrease in mean square error of the retrieved signal compared to standard STFT method.

• 出版日期2018-6