نشریه علمی پژوهش های نوین در سامانه های دفاع الکترونیکی

نشریه علمی پژوهش های نوین در سامانه های دفاع الکترونیکی

Enhancing the Robustness of Single-Frequency GPS Receivers against Narrowband Jamming using Time–Frequency Analysis

مقالات آماده انتشار

نوع مقاله : مقاله پژوهشی

نویسندگان
Saeedeh Yahyaei 1
Mohammad Reza Mosavi 1
Mohammad Javad Rezaei 2
1 Department of Electrical Engineering, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Iran
2 Department of Electrical Engineering, Shahid Sattari University of Aeronautical Engineering, Tehran, Iran
10.22034/joeds.2026.577554.1118
چکیده
GPS signals are inherently vulnerable to narrowband jamming, which can severely degrade receiver performance. This paper presents a computationally efficient frequency-domain anti-jamming method for single frequency GPS receivers, designed to mitigate interference prior to acquisition and tracking stages. The proposed approach employs Short-Time Fourier Transform (STFT) based spectral analysis, spectral windowing to reduce leakage, and adaptive thresholding to suppress interference components without requiring prior knowledge of jammer characteristics. The mitigated signal is reconstructed using the inverse STFT for standard receiver processing. Performance evaluation using real-world datasets under both interference-free and single-tone jamming conditions demonstrates that the proposed method significantly increases the number of trackable satellites and improves positioning accuracy. Experimental results demonstrate a 20% reduction in three-dimensional positioning error, from 14 m with conventional bin zeroing to 11.2 m with the proposed spectral mean replacement method, alongside an increase in the number of successfully tracked satellites from 5–6 to 7. These results confirm the effectiveness and practical applicability of the proposed approach for enhancing GPS receiver robustness in interference-prone environments.
کلیدواژه‌ها
FFT
GPS
Jamming
Signal processing
Time-frequency domain filtering
نشریه علمی پژوهش های نوین در سامانه های دفاع الکترونیکی

مقالات آماده انتشار، پذیرفته شده
انتشار آنلاین از 18 آبان 1405