A Radar Signal Modulation Recognition Method Based on Multi-scale Dual Attention Network

doi:10.12382/bgxb.2024.0447

Abstract

Abstract:

Addressing the issue of low recognition rates for complex multi-class radar signal modulation types under low signal-to-noise ratio,a radar signal modulation recognition method based on time-frequency fusion features and multi-scale dual attention network is proposed.By applying three time-frequency analysis methods,namely,smoothed pseudo Wigner-Ville distribution,Fourier synchrosqueezed transform and Hilbert-Huang transform based on variational modal decomposition,and the denoising preprocessing technique,the radar signals are transformed into three-channel time-frequency feature maps,which significantly enhances the robustness and expressive power of the features.A multi-scale dual attention network is designed to realize denoising preprocessing technique the cross-scale information fusion and noise suppression through the multi-scale channel attention mechanism.The time-frequency structure of radar signals is adaptively perceived by utilizing the multi-scale spatial attention,and the information is further integrated through gated fusion and residual connection.The experimental results show that the method achieves an average recognition rate of 98.99% for 12 types of typical radar signal modulation modes under the condition of a signal-to-noise ratio of -10dB,showing good robustness.

Key words: radar signal, time-frequency analysis, deep learning, multi-scale space, attention mechanism

CLC Number:

TN791

LIAO Renlong, LUO Zhongtao, YIN Shuijun, ZHANG Wei. A Radar Signal Modulation Recognition Method Based on Multi-scale Dual Attention Network[J]. Acta Armamentarii, 2025, 46(9): 240447-.

Figures/Tables 13

References 28

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网络层	神经元数量	卷积核参数	输出大小
输入	N/A	N/A	256×256×3
Conv	32	3×3,1,1	256×256×32
ReLU	N/A	N/A	256×256×32
MP	N/A	2×2,2,0	128×128×32
MSDA	N/A	N/A	128×128×32
Conv	64	3×3,2,1	64×64×64
MSDA	N/A	N/A	64×64×64
Conv	64	3×3,2,1	32×32×64
MSDA	N/A	N/A	32×32×64
Conv	64	3×3,2,1	16×16×64
ReLU	N/A	N/A	16×16×64
MP	N/A	2×2,2,0	8×8×64
Flatten	4096	N/A	1×4096
Linear	12	N/A	1×12

网络层	神经元数量	卷积核参数	输出大小
输入	N/A	N/A	256×256×3
Conv	32	3×3,1,1	256×256×32
ReLU	N/A	N/A	256×256×32
MP	N/A	2×2,2,0	128×128×32
MSDA	N/A	N/A	128×128×32
Conv	64	3×3,2,1	64×64×64
MSDA	N/A	N/A	64×64×64
Conv	64	3×3,2,1	32×32×64
MSDA	N/A	N/A	32×32×64
Conv	64	3×3,2,1	16×16×64
ReLU	N/A	N/A	16×16×64
MP	N/A	2×2,2,0	8×8×64
Flatten	4096	N/A	1×4096
Linear	12	N/A	1×12

调制方式	参数	变化范围/MHz
CW	f_c	45~55
LFM	f_c B_s	45~55 15~20
NLFM	f_c B_s	45~55 15~20
BPSK	f_c 13RandCode	45~55 (0,1)
QPSK	f_c 21RandCode	45~55 (0,1/2,1,3/2)
FSK	f_c Δf 13RandCode	45~55 10~20 (0,1)
4FSK	f_c Δf 16RandCode	45~55 5~15 (0,1,2,3)
Frank	f_c	45~55
P1	f_c	45~55
P2	f_c	45~55
P3	f_c	45~55
P4	f_c	45~55

调制方式	参数	变化范围/MHz
CW	f_c	45~55
LFM	f_c B_s	45~55 15~20
NLFM	f_c B_s	45~55 15~20
BPSK	f_c 13RandCode	45~55 (0,1)
QPSK	f_c 21RandCode	45~55 (0,1/2,1,3/2)
FSK	f_c Δf 13RandCode	45~55 10~20 (0,1)
4FSK	f_c Δf 16RandCode	45~55 5~15 (0,1,2,3)
Frank	f_c	45~55
P1	f_c	45~55
P2	f_c	45~55
P3	f_c	45~55
P4	f_c	45~55

网络模型	识别率/%				参数量/10⁶	浮点运算量/10⁹
网络模型	SNR=-14dB	SNR=-12dB	SNR=-10dB	SNR=-8dB	参数量/10⁶	浮点运算量/10⁹
MSDANet	85.12	96.22	98.99	99.99	0.5412	1.6668
CNN^[16]	34.56	41.12	54.87	60.11	0.0007	0.0035
CNN^[17]	55.23	68.20	75.17	80.53	2.5539	0.0334
CNN^[18]	72.11	87.26	94.76	98.98	0.2373	0.0707
CNN^[19]	52.33	73.83	86.21	95.55	12.3113	0.1509
CNN^[20]	32.71	50.42	74.78	90.45	21.0068	0.0371
LeNet^[21]	51.88	64.63	71.86	79.23	0.0622	0.0007
AlexNet^[22-24]	72.73	85.37	92.38	96.54	14.6060	0.3092
ResNet50^[25-28]	74.57	90.17	97.36	99.56	23.5326	4.1317