A New Interference Detection Method Based on Joint Hybrid Time–Frequency Distribution for GNSS Receivers

In this paper, a novel joint hybrid time–frequency (TF) analysis method based on the Hadamard product of Choi–Williams transform and smoothed pseudo Wigner–Ville distribution has been proposed in interference detection for Global Navigation Satellite System (GNSS) receivers. The proposed interference detection method has been tested by experiments on interfered GPS L1 signals in comparison with the state-of-the-art interference detection approaches. The analysis results show that the proposed interference detection method effectively eliminates the cross-terms present in the bilinear TF distribution and, at the same time, provides much improved TF localization and aggregation properties, verifying its effectiveness and validity in interference detection for GNSS receivers in jamming environments.