Aiming at the problem of low recognition accuracy of the low probability of intercept radar signal modulation method un-der the condition of low signal-to-noise ratio(SNR),a radar signal recognition method based on Transformer and convolutional neu-ral network(CNN)is proposed.First,the Swin Transformer model is introduced and the CNN feature extraction layer is designed at the front end of the model to construct the CNN-Swin transformer network(CSTN).Then the time-frequency characteristics of radar signals are obtained by time-frequency analysis.The images are input into CSTN model for training after image preprocess-ing,and richer semantic information of images is continuously extracted from the bottom to the top of the network.Finally,six types of signals with different modulation modes are classified and recognized by Softmax classifier.Simulation experiments show that when the SNR is-18 dB,the average recognition rate of the method for six types of typical radar signals reaches 94.26%,which proves the feasibility of the proposed method.
关键词
低截获概率雷达/信号调制方式识别/Swin/Transformer网络/卷积神经网络/时频分析
Key words
low probability of intercept(LPI)radar/signal modulation method recognition/Swin Transformer network/convolu-tional neural network(CNN)/time-frequency analysis
维普
万方数据