Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (6): 2138-2145.doi: 10.12305/j.issn.1001-506X.2024.06.32

• Communications and Networks • Previous Articles    

Interference identification based on mixed signal multidomain feature and Transformer framework

Pengfei YANG1, Ling HE1,2, Qian WANG1,2,*, Ruidi WANG1, Mingzhi ZHANG1   

  1. 1. School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, China
    2. Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province, Chengdu 611731, China
  • Received:2023-07-13 Online:2024-05-25 Published:2024-06-04
  • Contact: Qian WANG

Abstract:

Aiming at the vulnerability of wireless communication channels to interference from intentional radio frequercy signals, a method of interference identification from mixed signals is presented. In this work, a novel Transformer model named Multidomain-former is devised to serve as the multidomain features extractor and jamming types recognizer. The proposed model is built with the following characteristics: the original spectral data is firstly preprocessed by a specific sequence partitioning mechanism. Meanwhile, the initial sequence features are reserved by linear embedding and position coding. Secondly, an encoding module which jointly adopting inverse Fourier transform and Fourier transform is designed, by this means Multidomain-former can obtain both frequency domain and time domain features. A real wireless transceiver channel is established utilizing universal instruments and transceiver antennas, and the mixed signal spectrum is collected subject to different jamming-to-signal ratios (JSR) to form training and test data sets. The interference classification experiments are carried out sequentially by the proposed Multidomain-former, in comparison with the classic Transformer and other popular deep learning networks as well. It is shown that Multidomain-former achieves the best performance with the least number of parameters and lower complexity. With the condition of the JSR is less than 10 dB, the probability for correct classification of Multidomain-former is 2%~3% higher than that of classic Transformer. When the JSR is equal to -5 dB, the performance of Multidomain-former is proofed to increase by 3.0%~9.3% on correct classification rate compared with other benchmarks.

Key words: mixed signal, multidomain feature extraction, interference identification, Transformer, jamming-to-signal ratio (JSR)

CLC Number: 

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