Integrated Communications and Positioning System with Low Probability of Interception and Anti-Jamming Waveform

localization and communications are two fundamental requirements for unmanned aerial vehicle (UAV) clusters. However, in certain severe environments, the satellite positioning and navigation service is unavailable. Moreover, the information exchange among UAV nodes also faces the risk of eavesdropping and jamming. How to realize relative positioning as well as low probability of interception (LPI) and reliable communications is an urgent issue. Inspired by the above considerations, this paper proposes an integrated communications and positioning protocol with LPI and anti-jamming waveform. We design a flexible frame structure that exploits pilots and the following data symbols for distance measurement and degree of arrival estimation. The data symbols are specially processed via the weighted fractional Fourier 4 transform (WFRFT). Compared to the traditional spread spectrum frequency communication and positioning integration technologies, the WFRFT-based LPI method not only realizes high-precision positioning but also has better security performance. In this way, secure transmission in complex electromagnetic conditions can be achieved and physical layer security can be further improved. Simulation and analysis results show that the low interception communication and positioning integration technology based on an array antenna provides a more secure and accurate solution for wireless communication and positioning, showing considerable potential for development.