基于MP-WFRFT的多维联合调制卫星隐蔽通信研究倪磊①达新宇*②胡航③王浩波③①(中国人民解放军95037部队武汉430074)②(阳光学院人工智能学院福州350108)③(空军工程大学信息与导航学院西安710077)摘要：为进一步提高卫星信号的隐蔽性能，该文结合加权分数阶傅里叶变换(WFRFT)的星座混淆特性与混沌映射轨迹的抗截获特性，提出一种基于物理层安全的双极化卫星联合调制方案。借鉴“相位扰码”思想和“联合设计”理念，通过扩展4-WFRFT加权项参数，增加了卫星信号处理的多样性，在此基础上嵌入Logistic映射加密，提高了信息破解的难度。建立双极化卫星混沌安全传输系统模型，提出基于MP-WFRFT一体多维的组合隐蔽新概念，探索双极化卫星信号星座优化设计和裂变融合机理。仿真结果验证了所提方案的有效性。关键词：卫星隐蔽通信；傅里叶变换；极化调制；混沌映射；星座图中图分类号：TN911.7文献标识码：A文章编号：1009-5896(2023)04-1183-09DOI:10.11999/JEIT220121ResearchonMulti-dimensionalJointModulationforSatelliteCovertCommunicationBasedonMP-WFRFTNILei①DAXinyu②HUHang③WANGHaobo③①(Unit95037ofPLA,Wuhan430074,China)②(CollegeofArtificialIntelligence,YangoUniversity,Fuzhou350108,China)③(InformationandNavigationCollege,AireForceEngineeringUniversity,Xi’an710077,China)Abstract:Toimprovefurthertheconcealmentperformanceofsatellitesignals,combinedwiththeconstellationconfusioncharacteristicsofWeightedFRactionalFourierTransform(WFRFT)andtheanti-interceptioncharacteristicsofchaotictrajectory,adualpolarizationsatellitejointmodulationschemebasedonphysicallayersecurityisproposed.Referringtotheideaofphasescramblingcodeandtheconceptofjointdesign,thediversityofsatellitesignalprocessingisincreasedbyexpandingtheweightedtermparametersof4-WFRFT.Onthisbasis,logisticmappingencryptionisembeddedtoenhancethedifficultyofinformationcracking.Thechaoticsecrettransmissionmodelofsecuredual-polarizedsatellitecommunicationsystemisestablished,anewconceptofintegratedmulti-dimensionalconcealmentbasedonMP-WFRFTisproposed,andtheoptimaldesignandfissionmechanismofdual-polarizedsatellitesignalconstellationareexplored.Simulationresultsverifytheeffectivenessofourproposedsc...
