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空天地通信网络中物理层安全技术综述 被引量:6
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作者 闫富朝 刘怡良 +1 位作者 韩帅 孟维晓 《电信科学》 2020年第9期1-13,共13页
空天地一体化通信网络是未来无线通信的发展趋势,其固有的广播特性和广阔的覆盖区域,将导致网络通信系统面临严重的安全威胁。如何保证空天地通信网络的安全性是一个亟待解决的问题。物理层安全技术作为一种有效的安全手段,在无线通信... 空天地一体化通信网络是未来无线通信的发展趋势,其固有的广播特性和广阔的覆盖区域,将导致网络通信系统面临严重的安全威胁。如何保证空天地通信网络的安全性是一个亟待解决的问题。物理层安全技术作为一种有效的安全手段,在无线通信领域受到越来越多的关注。介绍了物理层安全的基础以及空天地通信信道模型,并对物理层安全中常见的窃听编码、波束成形、人工噪声、中继协作干扰和物理层密钥加密等技术进行了介绍和总结,最后提出了空天地通信网络中物理层安全面临的挑战和未来的发展趋势。 展开更多
关键词 空天地通信网络 物理层安全 窃听编码 波束成形和人工噪声 中继协作干扰 物理层密钥加密
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Relay selection region and system performance analysis for interfered cooperative ad-hoc networks
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作者 徐艳丽 夏玮玮 沈连丰 《Journal of Southeast University(English Edition)》 EI CAS 2012年第1期8-13,共6页
The performance of interfered cooperative ad-hoc networks is analyzed by stochastic geometry analysis and a selection region of relay is presented. First, assuming that the distribution of nodes in the random network ... The performance of interfered cooperative ad-hoc networks is analyzed by stochastic geometry analysis and a selection region of relay is presented. First, assuming that the distribution of nodes in the random network follows the Poisson point process (PPP), a closed-form expression of the outage probability is derived for the best relay selection (BRS) scheme. Secondly, the capacity of the network is presented for this scheme. Finally, a performance factor is defined to evaluate the performance gain obtained from the BRS. By using this factor, a relay selection region is found to guarantee the performance gain from the BRS. The analysis and simulation results show that the performance of the BRS not only depends on the densities of source nodes and relay nodes but also on the factors of networks such as the path loss factor and the decoding threshold. And the BRS has a greater advantage than direct transmission (DT) in hush environments such as the long transmission distances, much interference and the high decoding thresholds. 展开更多
关键词 COOPERATION INTERFERENCE relay selection outageprobability transmission capacity stochastic geometry analysis
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Security-Oriented Transmission Based on Cooperative Relays in Cognitive Radio
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作者 王莉 马鑫 +2 位作者 马跃 滕颖蕾 张勇 《China Communications》 SCIE CSCD 2013年第8期27-35,共9页
In this paper,we propose a securityoriented transmission scheme with the help of multiple relays in Cognitive Radio(CR).To maximise the Secrecy Capacity(SC)of the source-destination link in CR,both beamforming and coo... In this paper,we propose a securityoriented transmission scheme with the help of multiple relays in Cognitive Radio(CR).To maximise the Secrecy Capacity(SC)of the source-destination link in CR,both beamforming and cooperative jamming technologies are used to improve the performance of the Secondary User(SU)and protect the Primary User(PU).The effectiveness of the proposed scheme is demonstrated using extensive simulation.Both theoretical analyses and simulation results reveal that the proposed scheme contributes to the secure transmission of the SU with acceptable attenuation of the Signal-to-Noise Ratio(SNR)at the PU receiver,and the upper bound of the SC at the SU receiver is able to exploit the power allocation strategy. 展开更多
关键词 CR SC power allocation acceptable SNR attenuation level
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