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| 1 | Introduction to Wireless Endogenous Security and Safety:Problems, Attributes, Structures and Functions显示文摘The information security and functional safety are fundamental issues of wireless communications sytems.The endogenous security principle based on Dynamic Heterogeneous Redundancy provides a direction for the development of wireless communication security and safety technology.This paper introduces the concept of wireless endogenous security from the following four aspects.First,we sorts out the endogenous security problems faced by the current wireless communications system,and then analyzes the endogenous security and safety attributes of the wireless channel.After that,the endogenous security and safety structure of the wireless communications system is given,and finally the applications of the existing wireless communication endogenous security and safety functions are listed. | Liang Jin Xiaoyan Hu Yangming Lou Zhou Zhong Xiaoli Sun Huiming Wang Jiangxing Wu | 2021 | China Communications2021，18，9： | 10 |
| 2 | Secret Key Generation Based on Two-Way Randomness for TDD-SISO System显示文摘A novel secret key generation(SKG)method based on two-way randomness is proposed for TDD-SISO system.The legitimate transceivers mutually transmit their own random signal via reciprocal wireless channel,then the multiplication of transmitted and received signal is used as common randomness to generate secret keys.In quasi-static channel,the theoretical SKG rates(SKGRs)of the three SKG methods,namely wireless channel based,one-way randomness and two-way randomness,are derived and compared.Further,two practical SKG schemes based on twoway randomness,Scheme-1bit and Scheme-3bit,are completely designed and simulated.Generally,Scheme-1bit applies to low signal to noise ratio(SNR)scenarios and achieves 0.13~0.86bit/T_s SKGR and 10^(-2)~10^(-5) level secret key outage probability(SKOP),while Scheme-3bit fits high SNR situation and obtains 0.93~1.35bit/T_s SKGR and 10^(-3)~10^(-4) level SKOP.At last,the national institute of standards and technology(NIST)test is conducted to evaluate the secret key randomness(SKRD)and the test results show that both of the proposed schemes have passed the test. | Shengjun Zhang Liang Jin Yangming Lou Zhou Zhong | 2018 | China Communications2018，15，7： | 8 |
| 3 | Analysis and Application of Endogenous Wireless Security Principle for Key Generation显示文摘The open and broadcast nature of wireless channels leads to the inherent security problem of information leakage in wireless communication.We can utilize endogenous security functions to resolve this problem.The fundamental solution is channel-based mechanisms,like physical layer secret keys.Unfortunately,current investigations have not fully exploited the randomness of wireless channels,making secret key rates not high.Consequently,user data can be encrypted by reducing the data rate to match the secret key rate.Based on the analysis of the endogenous wireless security principle,we proposed that the channel-based endogenous secret key rate can nearly match the maximum data rate in the fast-fading environments.After that,we validated the proposition in an instantiation system with multiple phase shift keying(MPSK)inputs from the perspectives of both theoretical analysis and simulation experiments.The results indicate that it is possible to accomplish the onetime pad without decreasing the data rate via channelbased endogenous keys.Besides,we can realize highspeed endogenously secure transmission by introducing independent channels in the domains of frequency,space,or time.The conclusions derived provide a new idea for wireless security and promote the application of the endogenous security theory. | Xu Wang Liang Jin Yangming Lou Xiaoming Xu | 2021 | China Communications2021，18，4： | 1 |
| 4 | Joint radio frequency front-end and digital back-end antijamming scheme based on a metasurface antenna array显示文摘An array’s degree of freedom(DoF)determines the number of jamming incidents that can be managed and the antijamming performance.Conventional arrays can improve the DoF only by increasing the number of antennas.On the other hand,when the received signal is digitized,high-power jamming will reduce the number of bits used to represent the desired signal,further increasing the difficulty of back-end antijamming based on digital signal processing.In this paper,we propose a joint radio frequency(RF)front-end and digital back-end antijamming scheme based on a metasurface antenna array.The metasurface antennas can rapidly switch patterns when receiving signals,so that a single channel can be equivalent to multiple channels and increase the DoF.We use independent component analysis to estimate the channel and then optimize the array parameters under the minimum signal-to-jamming ratio constraint of each antenna.The proposed scheme works well under high-power jamming conditions by suppressing jamming at the RF front end and using a low-precision analog-to-digital converter.Simulation results show that the proposed scheme reduces the bit error rate of the received signals by one order of magnitude compared with the conventional array. | Yangming LOU Liang JIN Wenyu JIANG Shuaifang XIAO | 2023 | Frontiers of Information Technology & Electronic Engineering2023，24，12： | 0 |
| 5 | Multi-stream signals separation based on space-time-isomeric(SPATIO)array using metasurface antennas显示文摘In spatial domain signal processing,it is necessary to equip more antennas at the receiver to improve spatial demultiplexing capability.However,increasing the number of antennas under restricted space will reduce antenna spacing and raise the channel correlation,making the number of signal streams spatially demultiplexed much smaller than that of antennas.This paper proposes a method to design a space-timeisomeric(SPATIO)array based on metasurface antennas under wireless multipath conditions.Each antenna in this array has a different pattern and varies independently with time,reducing the channel correlation by superposing multipath at distinct positions and moments.Based on the SPATIO array,we present an array parameter design scheme based on infinity norm minimization,which can maximize the received energy of each stream while separating multi-stream received signals.Simulation results illustrate the performance of the SPATIO array for multi-stream signal reception.Compared with conventional multiple-input multipleoutput arrays,the proposed array can reduce the bit error rate by one order of magnitude under the same simulation conditions. | Yangming LOU Liang JIN Huiming WANG Zhou ZHONG Junyan DAI | 2024 | Science China(Information Sciences)2024，67，2： | 0 |
| 6 | Physical-Layer Key Generation Based on Multipath Channel Diversity Using Dynamic Metasurface Antennas显示文摘Physical layer key generation(PKG)technology leverages the reciprocal channel randomness to generate the shared secret keys.The low secret key capacity of the existing PKG schemes is due to the reduction in degree-of-freedom from multipath fading channels to multipath combined channels.To improve the wireless key generation rate,we propose a multipath channel diversity-based PKG scheme.Assisted by dynamic metasurface antennas(DMA),a two-stage multipath channel parameter estimation algorithm is proposed to efficiently realize super-resolution multipath parameter estimation.The proposed algorithm first estimates the angle of arrival(AOA)based on the reconfigurable radiation pattern of DMA,and then utilizes the results to design the training beamforming and receive beamforming to improve the estimation accuracy of the path gain.After multipath separation and parameter estimation,multi-dimensional independent path gains are utilized for generating secret keys.Finally,we analyze the security and complexity of the proposed scheme and give an upper bound on the secret key capacity in the high signal-to-noise ratio(SNR)region.The simulation results demonstrate that the proposed scheme can greatly improve the secret key capacity compared with the existing schemes. | Zheng Wan Yangming Lou Xiaoming Xu Jinmei Yang Wenyu Jiang Kaizhi Huang Liang Jin | 2023 | China Communications2023，20，4： | 0 |
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