Showing 1,081 - 1,100 results of 29,875 for search '"communications"', query time: 0.09s Refine Results
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    Novel Chaos Secure Communication System Based on Walsh Code by Gang Zhang, Niting Cui, Tianqi Zhang

    Published 2015-01-01
    “…A multiuser communication scheme which is a hybrid of Walsh code with DCSK and CDSK is proposed to improve low data transmission rate of Differential Chaos Shift Keying (DCSK), poor bit error ratio (BER) performance of Correlation Delay Shift Keying (CDSK), and disadvantage of orthogonality in traditional multiuser DCSK. …”
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    Article
  5. 1085

    Research on beam management of non-coaxial OAM communication system by Feng ZHENG, Gaoming DUAN, Liangang CHI

    Published 2021-12-01
    “…As a new modulated degree of freedom, orbital angular momentum (OAM) could greatly improve the spectrum utilization of wireless communication.However, the uniform circular array (UCA)-based OAM communication system requires the transceiver array to be static and perfectly aligned, which makes it difficult for OAM to be practically applied.A beam management method based on OAM was proposed, which determined the best beam matching by scanning the beam of receiver and receiver, and the matched beam was used to communicate.Simulation results show that the proposed scheme could effectively reduce the system performance degradation caused by non-coaxial of receiver and transmitter arrays.…”
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  6. 1086

    Study on the Security Access Technology of Business Platform Communication Network by 陈捷

    Published 2014-04-01
    “…Combined with the features of telecom operator communications network, the security access technology from business platform to signaling network was discussed, and the key technology about business platform accessing security gateway was elaborated. …”
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    Article
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    Consideration and suggestion of talents team construction for information and communication industry by Li YAN, Fenfen LIN

    Published 2016-12-01
    Subjects: “…information and communication industry…”
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    Communication service escape strategy oriented to the smart distribution grid by Wei DENG, Junyu LIU, Zhe LIU, Shuxian LI

    Published 2018-03-01
    “…With the development of the smart grid,the communication network for distribution grid plays a more and more importantl supporting role in smart distribution grid.There are various types of communication services in distribution grid,and they differ in communication requirements.A single network cannot meet the needs of all of them.Thus,it is necessary to introduce the heterogeneous network architecture into smart distribution.To improve the reliability of distribution grid,a multi-objective escape strategy based on heterogeneous access networks was proposed,which considered the current state of the communication and services requirements.Based on the network capacity,a multi-objective model subjected to the service functions of real-time (RT) and non-real-time (NRT) services was consouctd by this strategy.And then NSGA-II was adopted to get the Pareto front.The simulation results show that the strategy can guarantee the escape rate and timelines of RT and NRT distribution services.…”
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  12. 1092

    Analysis and suggestions on inter-satellite laser communication of satellite Internet by Shanzhi CHEN, Zhiwen FAN, Jiade JIN, Yun CAO

    Published 2024-02-01
    Subjects: “…inter-satellite laser communication…”
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    Article
  13. 1093

    The Communication Solution for LTE System under Radar Interference Circumstance by Hang Zheng, Yunjie Li, Yunpeng Zhu

    Published 2015-01-01
    “…The interferences of radar and communication system coexistent environment are analyzed in this paper, and an attractive detection mechanism of the radar video signal and proportional fair scheduling algorithm based on channel sensing are proposed to realize the communication by using radar radiant intermissions. …”
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  14. 1094

    Confidential communication scheme based on uncertainty of underwater noisy channels by Ming XU, Fang CHEN

    Published 2019-04-01
    “…Aiming at the influence of the uncertainty of underwater noise on information transmission and the security problem of the communication over noisy channels,a confidential communication scheme based on the uncertainty of underwater noisy channels was proposed.The proposed scheme was composed of an interactive key extraction protocol based on Godel’s code and a privacy amplification protocol based on r-circulant Toeplitz matrix.During the process of key extraction,the key sequence comparing number was reduced through the Godel’s code.When calculating the key length after privacy amplification,the uncertainty of underwater noise was considered to make the proposed scheme more practical.Experimental results show that under the condition of satisfying protocol security,it takes 11.99 s to transmit 119 940 bit string where the lower bound of the generated secret key length is 117 331 bit after privacy amplification and the upper bound of the adversary’s information about the secret key is 2 609 bit.Moreover,the proposed scheme (nt+s)×(nt+s)-order r-circulant Toeplitz matrix decreases(nt+s)-1 bit memory space compared to the traditional Toeplitz matrix with the same order.…”
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    Advertising and promotion : George E. Belch, MIchael A. Belch by Belch, George E.

    Published 2024
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    Connection Characteristics and Hierarchical Structure of China’s Urban Network-Based on the Communications Technology Service Industry by Hailong Liu, Yu Zhang, Ziyu Sang, Weiqiao Wang, Liping Zhang, Man Li

    Published 2022-01-01
    “…Considering the importance of China’s digital economy, industrial Internet, and high-quality development, this study analyzed China’s urban network from the perspective of the communications technology service industry. Three sub-networks (R & D, sales, and investment) and a comprehensive network were constructed. …”
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    Experimental Demonstration of Special-Shaped 32-Quadrature Amplitude Modulation Constellations for Visible Light Communications by Xinyue Guo, Shuangshuang Li, Yang Guo

    Published 2018-01-01
    “…With the rapid development of light-emitting diode, visible light communication (VLC) has become a candidate technology for the next generation of high-speed indoor wireless communication. …”
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