Showing 461 - 480 results of 3,139 for search '"wireless"', query time: 0.07s Refine Results
  1. 461

    DPM-based method for tracking maneuvering targets in wireless sensor networks by LIN Jin-zhao1, LI Guo-jun2, ZHOU Xiao-na2, ZHOU Dao-jun 2, JIANG Yong 2

    Published 2010-01-01
    “…Focused on energy efficiency issues under tracking targets within WSN,a new dynamic power management(DPM) method for tracking distributed targets was proposed combining with the network energy consumption model and wake-up mechanism.With precedent location information of maneuvering target,the algorithm involved both cancelling noise by wavelet filter and predicting target state by autoregressive transformation is introduced to awaken wireless sensor nodes so that their sleep time is prolonged and energy consumption is reduced.According to the current location of maneuvering target,related nodes in an appointed cluster of WSN constitute a distributed dynamic tracking unit,and the cluster head is responsible for collecting the measurement information from the nodes in the tracking unit.A locating algorithm based on the relative posi-tion of two circulars formed on the bases of measurement information is adopted to simplify the process of locatiny and tracking target.Simulation results show that the DPM-based method can reduce the nodes’ energy consumption,meet the locating and tracking accuracy,and can be applied to locate and track the maneuvering targets on the earth surface.…”
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  2. 462
  3. 463

    Fault detection and diagnosis method for heterogeneous wireless network based on GAN by Xiaorong ZHU, Peipei ZHANG

    Published 2020-08-01
    Subjects: “…heterogeneous wireless network…”
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  4. 464
  5. 465

    Relativity analysis on wireless value-added services market and SP regulation by LI Da-chuan1, SUN Hong-bin1, XIN Zhan-hong1

    Published 2008-01-01
    “…Number, CI (corporation image) and creativity of SP (services provider), set up a theory model on WVAS(wireless value-added services) market and SP regulation, to research regulation’s impact on SP market were analyed. …”
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  6. 466

    Sensing Coverage Prediction for Wireless Sensor Networks in Shadowed and Multipath Environment by Sushil Kumar, D. K. Lobiyal

    Published 2013-01-01
    “…Sensing coverage problem in wireless sensor networks is a measure of quality of service (QoS). …”
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  7. 467

    Optimization of Wireless Communication Coverage in Underground Tunnels Based on Zone Division by Yu Huo, Qingsong Hu, Yanjing Sun, Xiwang Guo, Liang Qi, Xiaohu Zhao, Enjie Ding

    Published 2020-01-01
    “…In order to reduce the path loss of the wireless communication signal in the underground tunnel, a scheme for configuring the antenna polarization of wireless systems based on a zone-division method is proposed. …”
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  8. 468

    Robust Estimation Fusion in Wireless Senor Networks with Outliers and Correlated Noises by Yan Zhou, Dongli Wang, Tingrui Pei, Shujuan Tian

    Published 2014-04-01
    “…This paper addresses the problem of estimation fusion in a distributed wireless sensor network (WSN) under the following conditions: (i) sensor noises are contaminated by outliers or gross errors; (ii) process noise and sensor noises are correlated; (iii) cross-correlation among local estimates is unknown. …”
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  9. 469
  10. 470

    A Clustering Metbod Based on tbe Tbresbold in Wireless Heterogeneous Network by Dongsheng Han, Shasha Ding, Ping Yu

    Published 2015-04-01
    “…The base station clustering problems in wireless heterogeneous network to suppress the inter cell interference were studied.A clustering method based on the threshold,which can improve the system performance,was proposed.The method maximizes the transmission rate for the target under the heterogeneous network scenarios,then selecting the base stations meeting the threshold value to collaborate,at the same time considering the user belonging-base station's signal intensity and the no-belongings' interference.The receiver transmission rate in different clustering methods was analyzed.The simulation results show that the proposed method is better than the existing methods in the system transmission rate.…”
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  11. 471

    On the Problem of Energy Balanced Relay Sensor Placement in Wireless Sensor Networks by Jie Jia, Guiyuan Zhang, Xueli Wu, Jian Chen, Xingwei Wang, Xiaolei Yan

    Published 2013-10-01
    “…Balanced energy depletion is an important way to prolong network lifetime for wireless sensor networks. Traditional algorithms mainly aim at maximizing network coverage rate with uniform sensor node distribution. …”
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  12. 472

    Energy Efficient Cluster Based Scheduling Scheme for Wireless Sensor Networks by E. Srie Vidhya Janani, P. Ganesh Kumar

    Published 2015-01-01
    “…The energy utilization of sensor nodes in large scale wireless sensor network points out the crucial need for scalable and energy efficient clustering protocols. …”
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  13. 473
  14. 474

    A Comparative Study of Routing Protocols of Heterogeneous Wireless Sensor Networks by Guangjie Han, Xu Jiang, Aihua Qian, Joel J. P. C. Rodrigues, Long Cheng

    Published 2014-01-01
    “…Recently, heterogeneous wireless sensor network (HWSN) routing protocols have drawn more and more attention. …”
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  15. 475

    Variational Inference of Kalman Filter and Its Application in Wireless Sensor Networks by Zijian Dong, Tiecheng Song

    Published 2013-11-01
    “…To verify the effectiveness of the proposed algorithm, VIKF is applied to the state estimation of discrete linear state space and the tracking problems in wireless sensor networks. Simulation results show that the variational approximation is effective and reliable for the linear state space, especially for the case with time-varying non-Gaussian noise.…”
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  16. 476

    Increasing capacity for wireless communication systems based on signal waveform collaboration by Jun SHI, Xue-jun SHA, Qin-yu ZHANG, Xiao-cheng SONG, Nai-tong ZHANG

    Published 2012-02-01
    “…A wireless communication technology based on signal waveform collaboration was proposed for resolving the conflict between limited spectrum resources and the rapidly growing service needs.The proposed technology employs linear frequency modulation (LFM) signals to transmit different users' information by utilizing the dual relationship between the energy concentration property of sinusoidal signals and that of LFM signals in the frequency and fractional domains,and the transmitted signals are superimposed on communication waveforms of the traditional sinusoidal carrier communication system on the same frequency band.At the receiver,frequency-and fractional-domain filters are applied to separate two kinds of users' signals.Moreover,the system model of the proposed technology is constructed,and theoretical analysis is also derived.The validity of the theoretical derivations is demonstrated via simulations.It has been shown that spectral efficiency can be effectively improved using signal waveform collaboration and transform-domain filtering.Theoretically,the proposed technology can achieve twice system capacity as large as that of the traditional sinusoidal carrier communication system.…”
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  17. 477

    Multi-ray channel modeling for programmable wireless environments in the terahertz band by Wenyu LUO, Hechao LIU

    Published 2019-07-01
    Subjects: “…programmable wireless environment…”
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  18. 478

    Performance Prediction of a Synchronization Link for Distributed Aerospace Wireless Systems by Wen-Qin Wang, Huaizong Shao

    Published 2013-01-01
    “…For reasons of stealth and other operational advantages, distributed aerospace wireless systems have received much attention in recent years. …”
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  19. 479
  20. 480

    A Conflict Avoidance Scheme for WiMedia Wireless Home Networks by Kyeong Hur, Won-Sung Sohn, YangSun Lee

    Published 2013-03-01
    “…We propose an efficient resource reservation scheme for UWB (Ultrawideband) WPAN (Wireless Personal Area Network) with D-MAC (Distributed Medium Access Control). …”
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