Research On Link16 Link Channel Transmission Technology Based On Software Radio

Link16 data link is the US military in order to adapt to the sea,land and air joint operations in terms of a set of communications,navigation and identification and tactical data link.It uses the cyclic redundancy check,forward error correction coding,interleaving,soft spread spectrum,MSK modulation,frequency hopping and other anti-jamming technology,With high capacity,high speed,good confidentiality and strong anti-interference characteristics.Based on the software radio platform,based on the research and simulation of the key technology of link16,the design of link16 data link transmitter and receiver is completed.This article discusses the pulse character composition of the communication carrier JTIDS system of link16,the message encapsulation type and message composition,and the link16 communication system。The key technologies adopted by link16 link channel are studied emphatically: channel coding,CCSK and MSK.It provides the theoretical basis for link16 link simulationAccording to link16 data link physical layer standard signal processing flow was designed,Completed the transmitter and receiver signal processing process was designed,including channel coding and decoding,interleaving and deinterleaving,spreading and despreading,MSK modulation and demodulation.The performance of link16 data link under different kinds of noise interference is simulated and analyzed.Simulation results show that the link16 system has strong error correction capability for centralized interference.For this case of large-scale interference of the entire frequency band,due to interference power is certain,and link16 hopping frequency points is limited,so scattered in the frequency hopping out of the interference power is limited.System anti-broadband interference performance.link16 system has a strong anti-interference ability.