With the development of smart grid, operation and control of a power system can be realized through the power communication network, especially the power production and enterprise management business involve a large a...With the development of smart grid, operation and control of a power system can be realized through the power communication network, especially the power production and enterprise management business involve a large amount of sensitive information, and the requirements for data security and real-time transmission are gradually improved. In this paper, a new 9-dimensional(9D) complex chaotic system with quaternion is proposed for the encryption of smart grid data. Firstly, we present the mathematical model of the system, and analyze its attractors, bifurcation diagram, complexity,and 0–1 test. Secondly, the pseudo-random sequences are generated by the new chaotic system to encrypt power data.Finally, the proposed encryption algorithm is verified with power data and images in the smart grid, which can ensure the encryption security and real time. The verification results show that the proposed encryption scheme is technically feasible and available for power data and image encryption in smart grid.展开更多
端到端语音加密通信系统中,密文语音数据在移动通信网中可能面临的失真、失码等问题,利用通用滤波多载波(Universal Filtered Multi Carrier,UFMC)技术的类语音调制特性可实现信道的抗压缩传输。为进一步增强其抗干扰性能,克服同步偏差...端到端语音加密通信系统中,密文语音数据在移动通信网中可能面临的失真、失码等问题,利用通用滤波多载波(Universal Filtered Multi Carrier,UFMC)技术的类语音调制特性可实现信道的抗压缩传输。为进一步增强其抗干扰性能,克服同步偏差的影响,提出一种UFMC类语音时频联合同步方案。该方案首先将Zadoff-Chu序列搭载至UFMC类语音系统的合适载波频段上合成新型类语音同步信号,而后根据UFMC类语音算法滤波器长度应为奇数的特点,构造出具有重复结构的类语音同步信号,使其可凭借自身冗余特性先后完成对时延、频偏的估计。在AMR-NB12.2kb/s声码器模型下的仿真结果表明:所提同步方案能精准定位解调起点,可较好满足UFMC类语音系统同步需求。展开更多
基金Project supported by the International Collaborative Research Project of Qilu University of Technology (Grant No.QLUTGJHZ2018020)the Project of Youth Innovation and Technology Support Plan for Colleges and Universities in Shandong Province,China (Grant No.2021KJ025)the Major Scientific and Technological Innovation Projects of Shandong Province,China (Grant Nos.2019JZZY010731 and 2020CXGC010901)。
文摘With the development of smart grid, operation and control of a power system can be realized through the power communication network, especially the power production and enterprise management business involve a large amount of sensitive information, and the requirements for data security and real-time transmission are gradually improved. In this paper, a new 9-dimensional(9D) complex chaotic system with quaternion is proposed for the encryption of smart grid data. Firstly, we present the mathematical model of the system, and analyze its attractors, bifurcation diagram, complexity,and 0–1 test. Secondly, the pseudo-random sequences are generated by the new chaotic system to encrypt power data.Finally, the proposed encryption algorithm is verified with power data and images in the smart grid, which can ensure the encryption security and real time. The verification results show that the proposed encryption scheme is technically feasible and available for power data and image encryption in smart grid.
文摘端到端语音加密通信系统中,密文语音数据在移动通信网中可能面临的失真、失码等问题,利用通用滤波多载波(Universal Filtered Multi Carrier,UFMC)技术的类语音调制特性可实现信道的抗压缩传输。为进一步增强其抗干扰性能,克服同步偏差的影响,提出一种UFMC类语音时频联合同步方案。该方案首先将Zadoff-Chu序列搭载至UFMC类语音系统的合适载波频段上合成新型类语音同步信号,而后根据UFMC类语音算法滤波器长度应为奇数的特点,构造出具有重复结构的类语音同步信号,使其可凭借自身冗余特性先后完成对时延、频偏的估计。在AMR-NB12.2kb/s声码器模型下的仿真结果表明:所提同步方案能精准定位解调起点,可较好满足UFMC类语音系统同步需求。
