Article ID: 22.20250374
This paper proposes a joint frequency-time domain anti-jamming circuit architecture for GNSS receivers, employing an FFT/all-phase FFT (FFT/apFFT) integrated phase difference method to detect multiple continuous wave interferences and estimate their frequencies. To address the high hardware resources and power consumption of traditional methods, this work develops an efficient FFT/apFFT integrated phase difference method with reverse-conjugated preprocessing. Algorithmic simulations demonstrate equivalent detection performance between the proposed and traditional methods. DC synthesis results in 40 nm CMOS technology reveal 25.69% area reduction and 35.73% power savings compared to baseline designs.
