Recognition of Dynamically Varying PRI Modulation via Deep Learning and Recurrence Plot
Pengcheng Wang, Weisong Liu, Zheng Liu · Journal of Systems Engineering and Electronics · 2022
Recognition of pulse repetition interval (PRI) modulation is a fundamental task in the interpretation of radar's intents. However, the existing PRI modulation recognition methods mainly focus on single-label classification of PRI sequences. The prerequisite for the effectiveness of these methods is that the PRI sequences have been perfectly divided according to different modulation types before identification, while the actual situation is that radar pulses reach the receiver continuously, and there is no completely reliable method to achieve this division in the case of non-cooperative reception. Based on the above actual needs, this paper implements an algorithm based on the recurrence plot technique and the multi-target detection model, which does not need to divide the PRI sequence in advance, and compared with the sliding window method, it can more effectively realize the recognition of the dynamically varying PRI modulation.