Wireless UV covert relay communication for armored formations in cluster combat

Ultraviolet(UV) wavelength ranging from 200 nm to 280 nm, is usually called the “solar blind” area. Due to the scattering transmission characteristics of UV, UV communication has the advantages of Non-Line-of-Sight(NLOS) communication, low interception rate, low identification rate and strong anti-interference ability. UV communication has become a new communication method in modern information warfare, and has been applied in the field of military communications. In the battlefield environment of complex terrain, the use of UV communication in armored formations overcomes the shortcomings of cable laying. And due to the strong absorption of atmosphere, UV communication has low identification rate performance, which has better covert transmission performance than other wireless communication modes such as infrared optical communication and radio frequency communication. Because of the serious attenuation of the UV atmospheric channel and high path loss, the end-to-end communication between the formations is easily interrupted, and the receiving end cannot receive the combat missions in time, which affects the combat capability of the formation. Therefore, in wireless UV multi-relay communication network, in order to improve the end-to-end communication quality and extend the effective communication distance of wireless UV, the optimal relay selection is discussed as the research object of this paper. The goal of establishing a stable and reliable three node cooperative communication link is achieved, and the performance of the bit error rate is analyzed by using the NLOS UV single scattering model.
    Professor Zhao Taifei research team of Xi'an University of Technology is dedicated to the research of wireless UV communication and networking technology. On this basis, the UV relay communication is studied. The optimal relay selection algorithm for armored formations based on wireless UV covert communication is proposed on the premise of decode-and-forward protocol, combined with the threshold decision idea. The algorithm combines the advantages of UV NLOS communication. The optimal relay selection is made for the formations according to the SNR threshold and channel characteristics selection strategy, and the BER performance is analyzed under Gaussian noise model. It can be seen from the simulation results that the BER performance of the UV cooperative communications system is affected by the threshold, the relay geometry and the relay position. According to different communication environments and the number of relay nodes, the appropriate cooperation threshold is selected, and the optimal relay is selected to establish a stable and reliable NLOS UV relay communication link. When the relay node selects a narrow transmitter and receiving apex angle as well as a wide receiving FOV, the relay closer to the source node becomes preferable. Therefore, when the cooperative communications link changes dynamically, the receiving and transmitting states of the relay node is adjusted according to the distance from the cooperative relay node to the source node. It can enable the relay cooperative communications system to obtain the best BER performance and improve the communication quality.

 Cooperative communications system model of UV multi-relay parallel link in armored formation

The communication network and Internet of things technology team of Xi'an University of Technology is mainly devoted to the research of wireless UV communication technology, routing technology and network invulnerability technology. The research team leader is Professor Zhao Taifei. Other research members include Associate Professor Yuan Lu, Master Li Yongming, Master Xu Shan, Master Wang Hua, Master Gao Peng, Master Lin Yaru and Master Cao Dandan. The research team has published more than 70 articles, and more than 30 articles have been indexed by SCI and EI. More than 20 national invention patents and software copyrights have been granted, and one monograph has been published. As the project leader, he has undertaken the National Natural Science Foundation of China, the Natural Science Foundation of Shaanxi Province, the China Postdoctoral Science Foundation Project, the Xi'an Science Project, and the Science and Technology Special Fund of the Shaanxi Provincial Department of Education. He participated in the National High Technology Research and Development Program (863 Program). He won 2 provincial and ministerial-level science and technology awards, including 1 second prize and 1 third prize, and won the bronze prize of “Shaanxi Science and Technology Workers Innovation and Entrepreneurship Competition” in 2017 and 2018 respectively.

Zhao Taifei, Li Yongming, Yuan Lu. Research on relay selection of armored formations wireless UV covert communication[J]. Opto-Electronic Engineering, 2019, 46(5): 180448.
DOI: 10.12086/oee.2019.180448