Method for functional state recognition of multifunction radars based on recurrent neural networks

• Main Authors: Xinsong Xu, Daping Bi, Jifei Pan
• Format: Article
• Language: English
• Published: Wiley 2021-07-01
• Series: IET Radar, Sonar & Navigation
• Online Access: https://doi.org/10.1049/rsn2.12075

Abstract Radar signal recognition plays a vital role in electronic warfare. For the multifunction radars (MFRs) with complex dynamical modes, the signal recognition needs to identify not only the emitter but also its current functional state. Existing research on MFR recognition mainly focuses on hierarchical modelling approaches. Inspired by recent progress of deep neural networks, the authors propose to further develop radar signal modelling with recurrent neural networks. Here, the authors propose a more efficient method for functional state recognition of MFRs based on a gated recurrent unit (GRU). The method makes full use of the ability of GRUs to automatically learn the characteristics of radar signal sequences, and the nonlinear modelling of GRUs can deal with the corrupted data well. Simulation results on the Mercury radar show that the proposed method achieves a great recognition accuracy with little prior information, and the designed GRU model outperforms the predictive state representation model under the same condition.