Radar Emitter Signal Recognition Based on Convolutional Bidirectional Long- and Short-Term Memory Network

Yunwei Pu; Taotao Liu; Haixiao Wu; Jiang Guo

doi:10.3788/LOP202259.2228007

Laser & Optoelectronics Progress, Volume. 59, Issue 22, 2228007(2022)

Radar Emitter Signal Recognition Based on Convolutional Bidirectional Long- and Short-Term Memory Network

Yunwei Pu^1,2、*, Taotao Liu¹, Haixiao Wu¹, and Jiang Guo¹

¹Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, Yunnan, China

²Computer Center, Kunming University of Science and Technology, Kunming 650500, Yunnan, China

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Figures & Tables(10)

Fig. 1. Comparison of main ridge sections of six radar signals. (a) 20 dB; (b) 0 dB

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Fig. 2. Polar coordinate AFMR face ratio of six types of signals. (a) 20 dB; (b) 0 dB

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Fig. 3. Basic structure of CNN

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Fig. 4. LSTM network structure

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Fig. 5. Bi_LSTM network structure

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Fig. 6. Polar coordinate AFMR aspect recognition algorithm based on CNN_Bi_LSTM

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Fig. 7. Comparison of recognition rate between the proposed method and manual methods

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Fig. 8. Comparison of recognition rate between the proposed method and other deep learning methods

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Table 1. Experimental results of different network structures
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Table 1. Experimental results of different network structures
Number Structure Loss
1 3CNN+1Bi_LSTM 0.2743
2 4CNN+1Bi_LSTM 0.2026
3 5CNN+1Bi_LSTM 0.3030
4 3CNN+2Bi_LSTM 0.2865
5 4CNN+2Bi_LSTM 0.2633
6 5CNN+2Bi_LSTM 0.3255

Table 2. Recognition rate of different classification methods

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Table 2. Recognition rate of different classification methods

Number	Method	Recognition rate /%					Time of an epoch /s
Number	Method	-6 dB	-4 dB	-2 dB	0 dB	2 dB	Time of an epoch /s
1	Proposed method	93.58	96.88	99.83	100	1	59
2	One-dimensional AFMR+LSTM	85.12	93.24	96.27	99.25	1	165
3	One-dimensional AFMR+SAE	82.33	96.83	98.83	99.55	1	96
4	One-dimensional AFMR+Bi_LSTM	86.12	94.57	95.63	99.42	1	462
5	Two-dimensional AFMR+CNN	93.17	96.33	99.50	100	1	85

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Yunwei Pu, Taotao Liu, Haixiao Wu, Jiang Guo. Radar Emitter Signal Recognition Based on Convolutional Bidirectional Long- and Short-Term Memory Network[J]. Laser & Optoelectronics Progress, 2022, 59(22): 2228007

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