Journal of Xidian University

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Radar emitter identification algorithm based on deep learning

ZHOU Zhiwen;HUANG Gaoming;GAO Jun;MAN Xin   

  1. (College of Electronic Engineering, Naval Univ. of Engineering, Wuhan 430033, China)
  • Received:2016-05-02 Online:2017-06-20 Published:2017-07-17

Abstract:

Aimed at the deficiency of traditional techniques of radar emitter feature extraction which rely heavily on artificial experience, a novel emitter identification algorithm based on joint deep time-frequency features is proposed. Time-domain signals are transformed into the 2-D time-frequency domain, and dimensionality reduction is implemented with random projection and principal component analysis with respect to sustaining subspace and energy. In the phase of pre-training, the deep model is layer-wise trained with unlabelled samples and network parameters are fine-tuned with label information. Finally the identification task is achieved with a logistic regression classifier. 6 types of emitter signals are adopted in simulation experiments to validate the effectiveness of the proposed algorithm, the experimental results indicating that the joint deep features help to obtain higher identification accuracy and that the algorithm is more efficient.

Key words: time-frequency distribution, dimensionality reduction, stacked auto-encoder, deep learning, radar emitter identification