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Multi-stream signals separation based on space-time-isomeric (SPATIO) array using metasurface antennas

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Science China(Information Sciences) 2024年第2期67卷 181-200页

作者： yangming lou Liang JIN Huiming WANG Zhou ZHONG Junyan DAI PLA Strategic Support Force Information Engineering University School of Information and Communications Engineering Xi'an Jiaotong University 3. State Key Laboratory of Millimeter WavesSoutheast University

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.

关键词： multiple-input multiple-output metasurface antenna space-time-isomeric array multipath channel degree of freedom

Secret Key Generation Based on Two-Way Randomness for TDD-SISO System

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China Communications 2018年第7期15卷 202-216页

作者： Shengjun Zhang Liang Jin yangming lou Zhou Zhong National Digital Switching System Engineering&Technological Research Center Zhengzhou 450002China

A novel secret key generation(SKG)method based on two-way randomness is proposed for TDD-SISO *** 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 *** 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 ***,two practical SKG schemes based on twoway randomness,Scheme-1bit and Scheme-3bit,are completely designed and ***,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 *** 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.

关键词： secret key generation physical layer security information reconciliation information theory

Introduction to Wireless Endogenous Security and Safety:Problems, Attributes, Structures and Functions

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China Communications 2021年第9期18卷 88-99页

作者： Liang Jin Xiaoyan Hu yangming lou Zhou Zhong Xiaoli Sun Huiming Wang Jiangxing Wu PLA Strategic Support Force Information Engineering University Zhengzhou 450002China Xi’an Jiaotong University Xi’an710049China Purple Mountain Laboratories:Networking Communications and SecurityNanjing 211111China

The information security and functional safety are fundamental issues of wireless communications *** endogenous security principle based on Dynamic Heterogeneous Redundancy provides a direction for the development of wireless communication security and safety *** paper introduces the concept of wireless endogenous security from the following four ***,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 *** 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.

关键词： wireless communication endogenous security information security functional safety

Physical-Layer Key Generation Based on Multipath Channel Diversity Using Dynamic Metasurface Antennas

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China Communications 2023年第4期20卷 153-166页

作者： Zheng Wan yangming lou Xiaoming Xu Jinmei Yang Wenyu Jiang Kaizhi Huang Liang Jin Information Engineering University Zhengzhou 450001China Purple Mountain Laboratories for Network and Communication Security Nanjing 210096China

Physical layer key generation(PKG)technology leverages the reciprocal channel randomness to generate the shared secret *** 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 *** improve the wireless key generation rate,we propose a multipath channel diversity-based PKG *** by dynamic metasurface antennas(DMA),a two-stage multipath channel parameter estimation algorithm is proposed to efficiently realize super-resolution multipath parameter *** 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 *** multipath separation and parameter estimation,multi-dimensional independent path gains are utilized for generating secret ***,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)*** simulation results demonstrate that the proposed scheme can greatly improve the secret key capacity compared with the existing schemes.

关键词： physical layer security multipath channel diversity physical layer key generation dynamic metasurface antennas

Joint radio frequency front-end and digital back-end antijamming scheme based on a metasurface antenna array

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Frontiers of Information Technology & Electronic Engineering 2023年第12期24卷 1739-1751页

作者： yangming lou Liang JIN Wenyu JIANG Shuaifang XIAO PLA Strategic Support Force Information Engineering University Zhengzhou450000China

An array’s degree of freedom(DoF)determines the number of jamming incidents that can be managed and the antijamming *** arrays can improve the DoF only by increasing the number of *** 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 *** this paper,we propose a joint radio frequency(RF)front-end and digital back-end antijamming scheme based on a metasurface antenna *** metasurface antennas can rapidly switch patterns when receiving signals,so that a single channel can be equivalent to multiple channels and increase the *** use independent component analysis to estimate the channel and then optimize the array parameters under the minimum signal-to-jamming ratio constraint of each *** 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 *** 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.

关键词： Antijamming Multiple-input multiple-output Metasurface antenna array Independent component analysis

A physical layer secret key consistency enhancement scheme using constellation decision information

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Security and Safety 2024年第1期3卷 88-103页

作者： Zheyuan Deng Liang Jin Xiaoyan Hu Zhou Zhong yangming lou Ge Niu PLA Strategic Support Force Information Engineering University Zhengzhou 450001China

Secret key generation based on a wireless channel(WC-SKG)is a promising solution to address the security issues in wireless ***,the consistency of channel estimation between two legal communication nodes in WC-SKG is often poor due to the receiver noise,signal power,etc.,leading to a low secret key generation rate(SKGR).Although there are several denoising algorithms such as orthogonal transformation to address this issue,existing schemes overlook the fact that data symbols are also affected by the *** results in existing schemes only using the pilot symbols for channel estimation and not fully utilizing the received signal power of the *** address this issue,we propose a consistency enhancement algorithm based on constellation decision information(CEA-CDI),which utilizes both pilot symbols and soft decision information of data symbols to improve *** Carlo simulation and numerical results demonstrate that our proposed scheme can improve performance by approximately 16 dB compared to initial channel estimation.

关键词： Physical secret key generation consistency enhancement soft decision

噪声不确定时基于波束成形的隐蔽无线通信性能分析

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通信学报 2020年第7期41卷 49-58页

作者：林钰达金梁周游楼洋明信息工程大学河南郑州450002 国家数字交换系统工程技术研究中心河南郑州450002

为了在噪声不确定时实现瑞利衰落环境下的隐蔽无线通信,采用基于复高斯随机编码和波束成形的下行隐蔽无线通信方案,重点分析了隐蔽无线通信性能。首先,利用假设检验理论分析基于该方案通信的隐蔽概率;然后,给出并证明非法检测方的最优... 详细信息

为了在噪声不确定时实现瑞利衰落环境下的隐蔽无线通信,采用基于复高斯随机编码和波束成形的下行隐蔽无线通信方案,重点分析了隐蔽无线通信性能。首先,利用假设检验理论分析基于该方案通信的隐蔽概率;然后,给出并证明非法检测方的最优检测门限,并进一步得到系统的平均隐蔽概率、连接中断概率和隐蔽吞吐量闭式表达式;最后,通过联合设计发射功率和目标隐蔽速率,实现系统最大隐蔽吞吐量的优化目标,并给出了基于分步搜索的相应求解算法。仿真结果表明,波束成形技术能够为隐蔽无线通信带来一定增益;与考虑合法接收方不受噪声不确定影响的理想情形相比,考虑合法接收方非理想情形时的隐蔽吞吐量有明显下降,几乎不受环境基本噪声水平的影响。

关键词：隐蔽无线通信噪声不确定波束成形隐蔽吞吐量

基于多径信道能量随机动态打散的隐蔽无线通信方案

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电子与信息学报 2023年第2期45卷 505-515页

作者：林钰达金梁黄开枝楼洋明孙小丽中国人民解放军战略支援部队信息工程大学郑州450002

为应对无线通信中的未知非法检测威胁,该文提出一种随机跳径隐蔽通信方案,实现了信号能量在多径上随机动态打散。首先,基于我方多径信道信息设计了隐蔽传输策略,并构建了敌方检测模型。接着,通过引入相关性纠偏因子,分别推导了所提方案... 详细信息

为应对无线通信中的未知非法检测威胁,该文提出一种随机跳径隐蔽通信方案,实现了信号能量在多径上随机动态打散。首先,基于我方多径信道信息设计了隐蔽传输策略,并构建了敌方检测模型。接着,通过引入相关性纠偏因子,分别推导了所提方案、选最强径方案和经典最大比发送方案的敌方平均接收信噪比(SNR)闭式表达式,并基于曲线拟合的方法计算了我方最小平均隐蔽概率,完成了隐蔽性能定性和定量评估。然后,推导了我方平均接收信噪比闭式解,分析了系统速率性能。仿真实验表明,所提方案不仅在未知敌方任何信息的一般情形下具有隐蔽性能优势,而且在敌方抵近我方的极端情形下可以最大程度地解决隐蔽通信失效问题。

关键词：隐蔽无线通信多径信道隐蔽概率

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基于多随机信号流的密钥生成方案

电子与信息学报 2019年第6期41卷 1405-1412页

作者：金梁蔡奥林黄开枝钟州楼洋明国家数字交换系统工程技术研究中心

基于随机信号流的密钥生成方案会在合法发送方发送随机信号时泄露部分共享随机源信息导致密钥安全性和可达密钥速率较低。针对此问题,该文提出一种基于多随机信号流的密钥生成方案。首先,发送方利用信道互易性和上行导频估计下行信道,... 详细信息

基于随机信号流的密钥生成方案会在合法发送方发送随机信号时泄露部分共享随机源信息导致密钥安全性和可达密钥速率较低。针对此问题,该文提出一种基于多随机信号流的密钥生成方案。首先,发送方利用信道互易性和上行导频估计下行信道,然后发送方在各天线上发送相互独立的随机信号流。由于窃听者难以准确估计所有随机信号流,因此难以窃取接收方每根天线接收到的叠加随机信号,而发送方则可根据估计的下行信道和自身发送的随机信号流计算出接收方各天线的接收信号。因此,可以将接收天线上的叠加随机信号作为共享随机源提取密钥。进一步地,该文还推导了该方案的可达密钥速率和共享随机源的互信息量表达式,并分析了两者间的关系以及对密钥安全性的影响。最后,通过仿真验证了该方案的有效性,仿真结果表明该方案能够有效降低窃听者观察到的共享随机源互信息,从而提升可达密钥速率及密钥安全性。

关键词：物理层安全多随机信号流密钥生成可达密钥速率