基于宽带信道状态信息的密钥生成策略

发布时间：2018-05-11 01:01

本文选题：密钥生成速率 + 功率分配　；参考：《清华大学学报(自然科学版)》2017年10期

【摘要】：对于宽带通信系统,大量的频点信息可以作为随机源生成密钥,从而增强通信系统的安全性。然而环境中散射径的数目是有限的,导致不同频点存在着相关性。在限定总发送功率的条件下,针对不同频点的功率分配策略会对密钥的安全性能产生影响。该文以密钥生成速率作为密钥安全性的衡量,建立了功率分配模型以实现密钥生成速率的最大化,并利用Lagrange乘数法进行求解。为降低计算复杂度,提出了一种次优的功率分配方法,并与最优的序列二次规划(sequential quadratic programming,SQP)求解算法进行对比,数值结果表明:次优功率分配策略下得到的密钥安全性能非常接近通过SQP算法得到的最优功率分配策略的密钥安全性能。
[Abstract]:For broadband communication systems, a large number of frequency point information can be used as a random source to generate key, thus enhancing the security of the communication system. However, the number of scattering paths in the environment is limited and leads to the existence of correlation in different frequency points. The performance is influenced by the performance. In this paper, the key generation rate is used as the measure of key security. The power allocation model is established to maximize the key generation rate. The Lagrange multiplier method is used to solve the problem. In order to reduce the computational complexity, a suboptimal power partition method and the optimal sequence two times programming (sequential qua) are proposed. Dratic programming, SQP) algorithm is compared, and the numerical results show that the key security performance obtained under the sub optimal power allocation strategy is very close to the key security performance of the optimal power allocation strategy obtained by the SQP algorithm.

【作者单位】：清华大学电子工程系微波与数字通信国家重点实验室;清华大学信息科学与技术国家实验室;国家电网公司信息通信分公司;
【基金】：国家“八六三”高技术项目(ss2015AA011306) 国家“九七三”重点基础研究发展计划项目(2012CB316000) 国家自然科学基金创新研究群体项目(61321061) 国家科技重大专项课题计划(2014ZX03004003-006) 清华大学自主科研项目(2015THZ02-3)
【分类号】：TN918.4

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