Research Of Information Transmission Technology On Multi-UAVs System Based On FPGA

With the widespread application prospect, the traditional single-UAV gives rise to various defects. UAV clusters deployed, UAV formation flying, unmanned aerial vehicles and manned aircraft work together, and multi-UAV as a network-centric warfare (NCW) information node application, operational applications of different patterns are emerging, which led to more development of multi-UAV information transmission system technology. All social circles have also embarked on an UAV ad hoc network research.Firstly, the thesis introduced the group structure and communication organization of the multi-UAV systems, proposed the concept of ad hoc networks, and analyzed the benefits of UAV ad hoc networks, the network topology and communications protocols.Secondly, based on the channel characteristics of mobile communication and the specific operating environment, proposed the channel model and channel characteristics of UAV network. According to the requirements of the high robustness, strong anti-jamming and low probability of intercept characteristics of the communication network, a new developed technical-two dimensional spread spectrum (2DSSS), which could improve ber performance, is proposed. The valuation-related demodulation is also used in order to reduce the complexity of realization.Then, determined the major technique data of the system, following the algorithm of programmable logic design, completed the building block design of communication system of the UAV ad hoc network. And, Verified the validity and feasibility of the transmitter.At last, a system model of the PSK-2DSSS is designed and simulated by matlab/Simulink. Analysis results of bit error rate (BER) are given by analyzing the BER performance of the system under the conditions of pulse jamming, narrow Gauss noise, and interleaved code technology. The simulation results show that the design of the system is feasible, and the system has a better anti-jamming capability.