Showing 281 - 300 results of 644 for search '"wireless communication"', query time: 0.05s Refine Results
  1. 281
  2. 282

    Antenna Element Index Modulation for Frequency Diverse Array by Gaojian Huang, Yuan Ding, Vincent Fusco, Shan Ouyang

    Published 2019-01-01
    “…It is shown that this enables the capability for simultaneous wireless communication and FDA Radar that has the range-angle coupling issue resolved.…”
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    Article
  3. 283

    Energy-efficient and intelligent cooperative spectrum sensing algorithm in cognitive radio networks by Tangsen Huang, Xiangdong Yin, Xiaowu Li

    Published 2022-09-01
    “…Green communication is the demand of current and future wireless communication. As the next-generation communication network, cognitive radio network also needs to meet the requirements of green communication. …”
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    Article
  4. 284

    Active defense technology against intelligent jammer by Zhibin FENG, Yuhua XU, Zhiyong DU, Xin LIU, Wen LI, Hao HAN, Xiaobo ZHANG

    Published 2022-10-01
    “…In the complex electromagnetic countermeasure environment, the intelligent development of jammer has caused a serious threat to wireless communication, while the traditional anti-jamming methods often passively adjusted the working mode or parameters, which will be at a disadvantage or even suppressed in the face of intelligent jammer.To solve this problem, a technical framework of active defense against jammer was proposed, aiming to disrupt the learning process of the intelligent jammer and reduce the jamming efficacy.In order to gradually achieve the goals of “understanding opponent”“controlling opponent” and “defeating opponent”, under the guidance of game theory and adversarial machine learning, the key technologies were discussed from three aspects: backward reasoning of jammer, algorithm vulnerability analysis and confrontational strategy design, independent optimization and online decision-making of anti-jamming strategy.Finally, combined with two specific cases, the feasibility and effectiveness of the proposed technical framework were verified.…”
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    Article
  5. 285

    Performance analysis of dual-media cooperative communication based on wireless and power line under hybrid fading by Zhixiong Chen, Yifang Jing, Dongsheng Han, Lijiao Wang

    Published 2019-05-01
    “…Wireless communication and power line communication are extensively applied in various fields, such as household Internet of things. …”
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    Article
  6. 286

    Broadcast Network Coverage with Multicell Cooperation by Hongxiang Li, Samee Ullah Khan, Hui Liu

    Published 2010-01-01
    “…Multicell cooperation has been identified as one of the underlying principles for future wireless communication systems. This paper studies the benefits of multicell cooperation in broadcast TV network from an information theoretical perspective. …”
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    Article
  7. 287

    Research on Key Technologies of Heterogeneous Wireless Network Resource Management Based on Centralized Radio Access Network Architecture by Lin Tian, Guowei Zhai, Liang Huang, Yiqing Zhou, Jinglin Shi

    Published 2013-06-01
    “…The future broadband wireless communication network will be a heterogeneous network with multiple access technologies seamlessly integrated. …”
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    Article
  8. 288

    Design and FPGA implementation of an efficient parallel Turbo decoder for combining state metric calculations by Qian ZHANG, Ming ZHAN, Jianwu ZHANG, Fulong WANG, Yunkai1 FENG, Hao TANG

    Published 2022-02-01
    “…In order to achieve the requirement of high throughput and low-power in wireless communication, a parallel Turbo decoder has attracted extensive attention.By analyzing the calculating of the state metrics, a low-resource parallel Turbo decoder architecture scheme based on merging the forward and backward state metrics calculation modules was proposed, and effectiveness of the new architecture was demonstrated through field-programmable gate array (FPGA) hardware realization.The results show that, compared with the existing parallel Turbo decoder architectures, the proposed design architecture reduces the logic resource of state metrics calculation module about 50%, while the dynamic power dissipation of the decoder architecture is decreased by 5.26% at the frequency of 125 MHz.Meanwhile the decoding algorithm is close to the decoding performance of the parallel algorithm.…”
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    Article
  9. 289

    Trends and enabling technologies on high-speed metro and short-reach optical transmission systems by Lei ZHANG, Yixiao ZHU, Fan ZHANG, Zhangyuan CHEN

    Published 2019-04-01
    “…The optical fiber communication network is the important infrastructure for the modern information society.Thanks to the reduction of fiber loss,the improvement of transceiver devices by electro-optical-electrical conversion,the development of modulation technology and the introduction of digital signal processing,the capacity of optical fiber transmission has been greatly improved.In recent years,due to the large capacity demand of data-centers and the next-generation wireless communication,metro and short-range transmission scenarios below 100 km have attracted lots of attention based on direct detection.The historical evolution of optical fiber communication systems was firstly reviewed,then the limiting factors in the direct detection system were analyzed.Furthermore,the principle and system configuration of one-dimensional to four-dimensional self-coherent technology were introduced,and finally,the low-cost evolution trend of the optical coherent transmission system was prospected.…”
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    Article
  10. 290

    Study of a new code set in multi-rate CDMA VLC system by Jianping WANG, Danyang CHEN, Huimin LU, Jianli JIN, Lifang FENG

    Published 2020-12-01
    “…For the diverse traffic requirements of the wireless communication multiple access system and the characteristics of VLC, a new orthogonal variable spreading factor zero cross correlation (OVSF-ZCC) code set was proposed for multi-rate VLC code division multiple access (CDMA) system, which consisted of unipolar spreading sequences with variable lengths, and zero cross correlation properties.Assuming the radiation of LED light source was Lambert distribution, a multi-rate CDMA-VLC system with proposed code set was further presented.The effects of construction parameters, transmission rate and distance on system performance were evaluated.The results show that the new code set can effectively reduce multiple access interference (MAI), and support multiple transmission rate requirements of different users in multiple access systems.…”
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    Article
  11. 291

    A Spectrum Sensing Method Based on Signal Feature and Clustering Algorithm in Cognitive Wireless Multimedia Sensor Networks by Yongwei Zhang, Pin Wan, Shunchao Zhang, Yonghua Wang, Nan Li

    Published 2017-01-01
    “…Firstly, the wireless communication signal features are obtained according to the sampling signal covariance matrix. …”
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  12. 292

    Double-RIS assisted anti-jamming communication method based on joint active and passive beamforming optimization by Haiyan GUO, Zhen YANG, Yulong ZOU, Bin LYU, Yuntian FENG, Yujuan ZHAO

    Published 2022-07-01
    “…For double-reconfigurable intelligent surface (RIS) assisted wireless communication system, an anti-jamming communication method based on joint active and passive beamforming optimization was proposed.In order to maximize the received signal-to-interference-and-noise ratio (SINR), a joint active and passive beamforming optimization problem was formulated.By using the alternating optimization (AO) algorithm, the formulated joint optimization problem was divided into three subproblems, which were solved iteratively in an alternating manner.Specifically, the quasi-optimal passive beamforming vector of each RIS was obtained by applying the semidefinite relaxation (SDR) algorithm, and the optimal active beamforming vector of the BS was obtained based on the generalized Rayleigh quotient.Simulation results demonstrate that the proposed method outperforms the traditional single-RIS ant-jamming communication methods.…”
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  13. 293

    Low-hit frequency-hopping communication systems for power Internet of things random access by Shu DU, Mei MA, Bo ZHAO, Qi ZENG, Xing LIU

    Published 2023-01-01
    “…The communication network is an essential component of the data acquisition and information transmission in power Internet of things (IoT).To meet the development requirements of multiple power service in the future, the wireless communication technique with flexible-access and high scalability is one of the development directions for power IoT.Due to the features of large-scale access, random access time, high security and reliability for information transmission of power IoT, a frequency-hopping (FH) technique with low-hit rate for random access was proposed.The construction algorithm of such FH pattern was based upon the combination and shift operation of conventional FH sequences.By the theoretical arithmetic and numerical simulation, the properties of the proposed FH pattern and the error-rate of the FH-based power IoT were evaluated.The analysis reveals that the new class of FH sequences and the system can meet the requirements of large-scale access and highly reliable communication for the power IoT, which has good application prospects.…”
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    Article
  14. 294

    A survey of physical layer security in space-air-ground communication and networks by Fuchao YAN, Yiliang LIU, Shuai HAN, Weixiao MENG

    Published 2020-09-01
    “…Space-air-ground communication and networks are the trend of wireless communication in the future.Because of its inherent broadcast nature and wide coverage,its communication and network systems will face serious security problems.How to ensure the security of space-air-ground communication and networks is an urgent problem to be solved.As an effective means of security,physical layer security technology has attracted more and more attentions.The basis of physical layer security and the channel model of space-air-ground communication and networks were introduced,and then the common technologies in physical layer security were introduced and summarized,such as wiretap coding,beamforming and artificial noise,relay cooperation interference and physical layer key generation,finally the challenges and future development trend of physical layer security in space-air-ground communication and networks were proposed.…”
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    Article
  15. 295

    A Classical LTE Cellular System Simulator for Computer Network Education by Julius Yaw Ludu, Justice Kwame Appati, Ebenezer Owusu, Prince Boakye-Sekyerehene

    Published 2021-01-01
    “…Usability testing of the proposed study reveals that the system is much easier to simulate the various scenarios in wireless communication.…”
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    Article
  16. 296

    Survey of the context-aware location privacy-preserving techniques by Dian-hui MAO, Jian CAO, Qiang CAI, Hai-sheng LI

    Published 2013-08-01
    “…With the advances in wireless communication technology and smart mobile devices, location-based services (LBS) providing personalized services based on users' location information, have been widely applied in many areas. …”
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    Article
  17. 297

    Wireless May Benefit Blockchain by Seungmo Kim, Junsung Choi

    Published 2024-12-01
    “…As such, it will be no longer a surprise if a blockchain system is composed of wirelessly connected nodes. However, wireless communication is known for its inherent unreliability caused by noise, interference, limited bandwidth, etc. …”
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    Article
  18. 298

    A Spread Spectrum Sequence for MC-CDMA System by Zhicheng Zhang, Xiaona Huang, Li Xiong

    Published 2015-11-01
    “…The MC-CDMA system takes the advantages of the OFDM system and the CDMA system.The MC-CDMA system is a kind of wireless communication aroused an ongoing and growing research interests,which has the characteristics of high bit transmission rate,high bandwidth efficiency,anti-jamming,and a large system capacity.Since the MC-CDMA system includes the multi-carrier modulation,it is difficult to design a spread spectrum sequence performing not only a high level of self-correlation and cross-correlation but also a low peak-to-average power ratio in the MC-CDMA system.To solve this problem,a spread spectrum sequence which was modulated by Golay code and m sequence was proposed.The spread spectrum sequence proposed owned a good performance in self-correlation,cross-correlation and peak-to-average power ratio.The simulation results show the effectiveness and the superiority of the proposed spread spectrum sequence.…”
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    Article
  19. 299

    Research on 5G high-precision indoor positioning technology for smart parks by Baoyou WANG, Jingtao YANG, Saibin YAO, Haina YE, Zhihui WANG, Qiyuan ZHANG, Junfeng FU, Taishi JIN

    Published 2023-08-01
    “…The 5G cellular network not only provides wireless communication capabilities for terminals but also offers positioning functionalities.Firstly, the 3GPP 5G positioning technology was briefly outlined, followed by the proposal of the 5G indoor positioning technology road-map.The cloud-edge collaborative integrated positioning architecture, the 5G+X fusion positioning solution, as well as the 5G positioning solution for smart parks were included, with a detailed analysis of the architecture and process.These positioning solutions seamlessly addressed the issue of locating people or objects in areas where GNSS signals cannot reach, which could meet the positioning accuracy and timeliness requirements in different scenarios.The technology solution has been applied in the industry with meter-level positioning accuracy and second-level timeliness, which has been well evaluated by customers.…”
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    Article
  20. 300

    Pattern Reconfigurable Wideband Stacked Microstrip Patch Antenna for 60 GHz Band by Alexander Bondarik, Daniel Sjöberg

    Published 2016-01-01
    “…The antenna is designed for 60 GHz central frequency and can be used in high speed wireless communication systems.…”
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