Research On Wireless Covert Transmission Technology Based On New Modulation

With the development of information technology,people's demand for information security is increasing.In order to prevent information from being stolen during the transmission process,it is particularly important to establish a secure information transmission path.Focusing on the problem of covert secure transmission of information,this paper begins to explore new modulation technologies with concealed transmission capabilities.Based on multi-carrier transmission technology,new multi-carrier index modulation and related-domain modulation techniques are studied,and software simulation links and hardware experimental platforms are built.This verifies the performance of the above-mentioned covert transmission technology based on the new modulation.The specific work of this article is as follows:First,this paper introduces the research background and research status of the new modulation technology.Secondly,this paper introduces the traditional index modulation system,and also introduces the related domain modulation technology.Then based on the basic principles of related modulation,an improved two-dimensional correlation domain modulation method is proposed and its performance is analyzed.Finally,the performance of improved two-dimensional correlation domain modulation is analyzed.Then,this paper introduces the time-frequency domain joint index modulation system,and builds a physical simulation test bed based on the software radio platform.Then based on the results of software and hardware simulation,the performance of the joint modulation system is analyzed.Then,this paper proposes a covert index modulation technique based on interleaving and studies its performance through simulation.Finally,for the problem that the peak-to-average power ratio of orthogonal frequency division multiplexing system is too high and affects concealment,this paper proposes a low peak-to-average ratio index modulation scheme.Subsequently,this paper introduces the index modulation system based on the correlation domain modulation technology,and builds a physical simulation test bed based on the software radio platform.Then,based on the software and hardware simulation results,the performance of the system is analyzed.Finally,this article summarizes the main contents of the paper.