一种抗盲检测的直扩隐蔽信号设计方法  

A Method of Designing Covert DSSS-Signal for Anti-blind Detection

作　　者：谢岸宏 朱立东[1] 翟继强[2] 李雄飞[2] XIE An-hong;ZHU Li-dong;ZHAI Ji-qiang;LI Xiong-fei(National Key Laboratory of Science and Technology on Communications,UESTC,Chengdu,Sichuan 611731,China;China Academy of Space Technology (Xi’an),Xi’an,Shaanxi 710100,China)

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731 [2]中国空间技术研究院西安分院,陕西西安710100

出　　处：《电子学报》2018年第12期2817-2823,共7页Acta Electronica Sinica

基　　金：预研基金(No.61405180503;No.6141B062901);国家高技术研究发展计划(863计划)(No.2012AA01A502);四川省科技厅资助项目(No.2014GZX004)

摘　　要：直扩信号具有抗干扰抗截获能力,在电子对抗、卫星通信、测控数传等方面有重要的应用价值.考虑到采用固定PN码、跳码和可变符号周期混沌序列等来提升信号抗截获能力的方式较为单一,本文将大信号掩盖技术与直扩技术结合,提出了一种增强信号隐蔽性的波形设计方法.将不同保密级别的数据分级调制实现大信号掩盖小信号,并从功率和周期两个方面对波形参数进行设计,突出大信号参数特征,隐藏机密信号特征.仿真表明设计的信号波形可抵抗常规盲检测,同时通过设置合理的波形参数可使机密信号的解调损失小于0. 5dB.DSSS-Signal(Direct Sequence Spread Spectrum Signal)has the ability of anti-jamming and anti-interception,it is widely used in electronic countermeasures,satellite communications,measurement and data transmission.It is simplex to improve signal anti-interception by the method of fixed PN(Pseudo-Noise)code,code hopping and variable symbol period chaotic sequence.Therefore,we combine the strong-signal masking technology with direct sequence spread spectrum technology,and propose a waveform design method to enhance the signal covertness.The data of different security levels are modulated hierarchically to make strong-signal mask weak-signal,also the parameters of waveform are designed in the aspects of power and period to highlight the characteristics of strong-signal and hide the confidential signal.Simulations show that the designed signal waveform can resist conventional blind detection.Moreover,setting the waveform parameters reasonably can achieve demodulation loss less than0.5dB.

关 键 词：通信对抗 大信号掩盖 抗截获 直扩信号 波形设计 抗盲检测 

分 类 号：TN914.42[电子电信—通信与信息系统]