[1] [1] KHAN M A,SALAH K. IoT security:review,blockchain solutions,and open challenges[J]. Future Generation Computer Systems, 2018(82):395-411.

[2] [2] DANEV B, ZANETTI D, CAPKUN S. On physical-layer identification of wireless devices[J]. ACM Computing Surveys(CSUR), 2013,45(1):1-29.

[3] [3] LIN Y, TU Y, DOU Z, et al. Contour stella image and deep learning for signal recognition in the physical layer[J]. IEEE Transactions on Cognitive Communications and Networking, 2021,7(1):34-46.

[4] [4] GOPALAKRISHNAN S,CEKIC M,MADHOW U. Robust wireless fingerprinting via complex-valued neural networks[C]// 2019 IEEE Global Communications Conference(GLOBECOM). Waikoloa,HI,USA,USA:IEEE, 2019:1-6.

[5] [5] LIN Y,ZHU X,ZHENG Z,et al. The individual identification method of wireless device based on dimensionality reduction and machine learning[J]. The Journal of Supercomputing, 2019,75(6):3010-3027.

[6] [6] ROBINSON J,KUZDEBA S. Riftnet:radio frequency classification for large populations[C]// 2021 IEEE 18th Annual Consumer Communications & Networking Conference(CCNC). Las Vegas,NV,USA:IEEE, 2021:1-6.

[7] [7] LIN Y,TU Y,DOU Z. An improved neural network pruning technology for automatic modulation classification in edge devices[J]. IEEE Transactions on Vehicular Technology, 2020,69(5):5703-5706.

[8] [8] YU J,HU A,LI G,et al. A robust RF fingerprinting approach using multisampling convolutional neural network[J]. IEEE Internet of Things Journal, 2019,6(4):6786-6799.

[9] [9] TU Y,LIN Y,HOU C,et al. Complex-valued networks for automatic modulation classification[J]. IEEE Transactions on Vehicular Technology, 2020,69(9):10085-10089.

[10] [10] ROBINSON J, KUZDEBA S, STANKOWICZ J, et al. Dilated causal convolutional model for RF fingerprinting[C]// 2020 10th Annual Computing and Communication Workshop and Conference(CCWC). Las Vegas,NV,USA:IEEE, 2020:157-162.

[12] [12] WANG M,LIN Y,TIAN Q,et al. Transfer learning promotes 6G wireless communications:recent advances and future challenges [J]. IEEE Transactions on Reliability, 2021,70(2):790-807.

[15] [15] POLAK A C, GOECKEL D L. Wireless device identification based on RF oscillator imperfections[J]. IEEE Transactions on Information Forensics and Security. 2015,10(12):2492-2501.

[16] [16] SAINATH T N,VINYALSi O,SENIOR A,et al. Convolutional,long short-term memory,fully connected deep neural networks[C]// 2015 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP). South Brisbane: IEEE, 2015: 4580-4584.