Showing 2,641 - 2,660 results of 3,139 for search '"wireless"', query time: 0.05s Refine Results
  1. 2641

    Performance analysis of 60 GHz pulse multiuser communication system based on cross-layer strategy by Xuehua LI, Chen SHEN, Yuanyuan YAO

    Published 2018-09-01
    “…Due to the advantages of license-free,strong directionality,high system capacity,and high transmission rate of Gbit/s,60 GHz band is listed as one of the candidate bands for new radios (new radio).In 5G ultra-dense networking scenario,the randomness of node switching caused by the decrease of the distance between network nodes may cause severe multiple access interference and resource mismatch problems.In this regard,based on the concept of cross-layer collaborative design,a resource scheduling strategy based on fairness was proposed.The multiple access performance of the strategy was simulated in a 60 GHz pulsed wireless communication system based on TH-PAM (time hopping pulse amplitude modulation).Simulation results show that compared with the system with pure physical layer optimization algorithm,the multiple access system which adopts this strategy shows stronger fairness and lower system error rate,but it needs increase the transmission power to meet the requirements of the coverage of the equivalent communication system.That is,there is a certain trade-off between the energy and fairness of the system,which can be used to guide the structure and deployment of the actual communication system.…”
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  2. 2642

    Estimation of FBMC/OQAM Fading Channels Using Dual Kalman Filters by Mahmoud Aldababseh, Ali Jamoos

    Published 2014-01-01
    “…We address the problem of estimating time-varying fading channels in filter bank multicarrier (FBMC/OQAM) wireless systems based on pilot symbols. The standard solution to this problem is the least square (LS) estimator or the minimum mean square error (MMSE) estimator with possible adaptive implementation using recursive least square (RLS) algorithm or least mean square (LMS) algorithm. …”
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  3. 2643

    A Movement-Efficient Deployment Scheme Based on Information Coverage for Mobile Sensor Networks by Wei Cheng, Yong Li, Yi Jiang, Xipeng Yin

    Published 2015-01-01
    “…Covering the surveillance region is a key task for wireless sensor networks. For mobile sensors, the deployment of sensors at appropriate locations is the key issue for sufficient coverage of surveillance area, and efficient resource management of sensor network. …”
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  4. 2644

    Radio Labelings of Lexicographic Product of Some Graphs by Muhammad Shahbaz Aasi, Muhammad Asif, Tanveer Iqbal, Muhammad Ibrahim

    Published 2021-01-01
    “…In this paper, we will discuss multidistance radio labeling used for channel assignment problems over wireless communication. A radio labeling is a one-to-one mapping ℘:VG⟶ℤ+ satisfying the condition |℘μ−℘μ′|≥diamG+1−dμ,μ′:μ,μ′∈VG for any pair of vertices μ,μ′ in G. …”
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  5. 2645

    AP Deployment Research Based on Physical Distance and Channel Isolation by Dangui Yan, Chengchang Zhang, Honghua Liao, Lisheng Yang, Ping Li, Guogang Yang

    Published 2014-01-01
    “…Aiming at the problem of inefficiency of wireless local area networks (WLAN) access point (AP) deployment in urban environment, a new algorithm for AP deployment based on physical distance and channel isolation (DPDCI) is proposed. …”
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  6. 2646

    Green communication and networking for Carbon-peaking and Carbon-neutrality: challenges and solutions by Zhisheng NIU, Sheng ZHOU, Yuxuan SUN

    Published 2022-02-01
    “…Driven by the Carbon-peaking and Carbon-neutrality strategic goals, future mobile communication and networks need to drastically reduce energy consumption while satisfying the growing traffic demand.Therefore, it is necessary to study the theories and technologies used to send more information bits with less energy (SMILE).To meet the challenge, it was far from enough to rely solely on the improvements of wireless transmission technologies and hardware.It was necessary to explore efficient energy utilization mechanisms from the perspective of the system and network.Both energy saving and renewable energy utilization approaches were proposed, and solutions for the growing computing energy consumption were provided.Specifically, by introducing hyper-cellular network, agile coverage and elastic access were realized, and thus service base stations and edge servers could enter the sleeping mode to save energy when the traffic volume was low.Meanwhile, by the introduction of renewable energy and the smart adaption of energy flow and information flow, the energy consumption of the power grid could be greatly reduced.Furthermore, green computing and artificial intelligence could be realized through network function virtualization, energy-efficient coordination of communication and compute resources, and distributed computing and coordination approaches of moving agents.…”
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  7. 2647

    Research on the edge-end collaboration framework for deterministic network by Guangmin SONG, Qunqing WANG, Zhanbing HUANG, Xun SHI, Gaojian HAN

    Published 2022-05-01
    “…5G vertical industries such as industrial automatic control have strict requirements on network transmission delay and reliability.It was focused on the AGV collaborative carrying scenarios, in which the key quality indicator (KQI) of the AGV collaboration and the requirements for network jitter were analyzed.Existing 5G ultra-low-latency technologies, such as the pre-scheduling mechanism, reduce transmission scheduling latency by reserving a large number of time-frequency resources, which heavily decreases spectrum efficiency.In addition, wireless channel quality factors such as weak coverage and interference, often cause large jitter, making it difficult to meet the service reliability requirements.In order to deal with these challenges, a deterministic edge-end cooperation framework design to guarantee end-to-end latency was proposed.Based on service flow characteristics, resource reservation was utilized to reduce scheduling latency.Moreover, the proposed framework could enhance data transmissions when poor status of channels was sensed.The experimental results show that the edge-end collaboration framework design can effectively increase the delay reliability, reduce the large jitter, and improve the KQI of AGV collaboration.…”
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  8. 2648

    Impact of Background Traffic on Speech Quality in VoWLAN by Peter Počta, Peter Kortiš, Martin Vaculík

    Published 2007-01-01
    “…The proposal of a new method for improved detection of the critical conditions in wireless telecommunication networks from the speech quality point of view is presented in this paper. …”
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  9. 2649
  10. 2650

    Analysis and Design of a Novel Multiband Antenna for Mobile Terminals by Yuan Yao, Wanzhong Chen, Xiaodong Chen, Junsheng Yu

    Published 2015-01-01
    “…It is very suitable for multifunctional terminal applications in wireless communication systems.…”
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  11. 2651

    A broadcast scheme for vehicle-to-pedestrian safety message dissemination by Odongo Steven Eyobu, Jhihoon Joo, Dong Seog Han

    Published 2017-11-01
    “…Furthermore, high-frequency periodic broadcasting causes fast device energy dissipation which is a key issue for small computing devices used in wireless sensor and mobile communications. Therefore, in order to achieve reliable message dissemination for vehicle-to-pedestrian safety, energy loss minimization mechanisms for pedestrian mobile devices should be developed. …”
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  12. 2652

    Adaptive Security Solutions for NOMA Networks: The Role of DDPG and RIS-Equipped UAVs by Syed Zain Ul Abideen, Abdul Wahid, Mian Muhammad Kamal

    Published 2024-11-01
    “…This method not only shows how flexible and successful the DDPG algorithm is at protecting wireless communications when used in conjunction with an RIS but it also highlights how much the algorithm has advanced secure communication systems.…”
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  13. 2653

    A Throughput Analysis Using a Non-Saturated Markov Chain Model for LTE-LAA and WLAN Coexistence by Mun-Suk Kim

    Published 2024-12-01
    “…In this paper, we propose an analytical model to calculate the throughput of each system in a scenario where a single LTE-LAA system shares an unlicensed channel with multiple wireless local area network (WLAN) systems. The LTE-LAA system is utilized for supplementary downlink transmission from the LTE-LAA eNodeB (eNB) to LTE-LAA devices. …”
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  14. 2654

    Review of Energy Harvesters Utilizing Bridge Vibrations by Farid Ullah Khan, Iftikhar Ahmad

    Published 2016-01-01
    “…For health monitoring of bridges, wireless acceleration sensor nodes (WASNs) are normally used. …”
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  15. 2655

    A Novel Scheduling Algorithm Based on Game Theory and Multicriteria Decision Making in LTE Network by Mohammad Nour Hindia, Ahmed Wasif Reza, Kamarul Ariffin Noordin

    Published 2015-03-01
    “…Fourth generation wireless networks provide mobile users with high data rate and quality of services, such as Long Term Evolution (LTE), which has been developed by the 3rd Generation Partnership Project (3GPP). …”
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  16. 2656

    Measurement of the electric energy storage capacity in solar thermoelectric generators’ energy harvesting modules by Pedro C Dias, Flávio JO Morais, Luis FC Duarte, Maria Bernadete M França, Anderson W Spengler, Andreu Cabot

    Published 2017-03-01
    “…Reducing energy consumption is mandatory in self-powered sensor nodes of wireless sensor networks that obtain all their energy from the environment. …”
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  17. 2657

    Discrete event simulation–based energy efficient path determination scheme for probabilistic voting–based filtering scheme in sensor networks by Su Man Nam, Tae Ho Cho

    Published 2020-08-01
    “…In wireless sensor networks, sensors are extremely vulnerable to false positive and false negative attacks due to their stringent energy and computational constraints. …”
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  18. 2658

    mmWave radar based robust sign language recognition for the smart museum by Xuerong ZHAO, Xuan WANG, Tong LIU, Xia ZHENG, Yicheng JIANG

    Published 2023-08-01
    “…A smart museum is a new form of a museum, which uses devices or technologies including the Internet of things (IoT) and artificial intelligence (AI) to build the information interaction channels between people, things, and space.Sign language recognition not only assists the visitors who have hearing or speech impairment to visit the museum without barriers but also helps study the visitors’ natural gesture interaction.However, the methods based on cameras and wearable devices mayhave issues like privacy or usability when applied to museum spaces.Therefore, a robust sign language recognition method based on millimeter-wave radar was proposed.Different features of distance and velocity changes relative to the radar device were firstly extracted in this method, then a physical data enhancement method was adopted to expand the training data.Finally, a ResNet based on the pre-processed distance time features and Doppler time features was designed to further remove the environment-related information and perform feature fusion for classification.Experimental results show that this method can effectively recognize sign language and achieve an averaged recognition accuracy of over 90% when the testing environment and the user's location change, providing a new method for smart museum wireless sign language and gesture recognition.…”
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  19. 2659

    Channel Characteristics of High-Speed Railway Station Based on Ray-Tracing Simulation at 5G mmWave Band by Lei Xiong, Haiyang Miao, Bo Ai, Tutun Juhana, Adit Kurniawan

    Published 2019-01-01
    “…Based on the ray-tracing simulation technology, this paper would study wireless channel characteristics of the three-dimensional (3D) model of high-speed railway station at the mmWave band. …”
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  20. 2660

    Multi-source information transmission and classification algorithm for equipment based on compressed sensing by Xiaohu ZHAO, Gang WANG, Boming SONG, Jiacheng YU

    Published 2020-02-01
    “…Aiming at the characteristics of various types of equipment in coal preparation plant and the dispersion of monitoring points,a multi-source information wireless transmission and classification algorithm for equipment based on compressed sensing was proposed.By constructing a multi-hop information transmission model,the information transmission problem was transformed into the compressed sensing problem of multi-path measurement signals,thereby the measurement matrix acquisition was transformed into the routing problem of the multi-hop information transmission model.Aiming at the large coherence of the obtained measurement matrix and affecting the signal reconstruction effect,the idea of random routing was introduced into the routing construction,and a random dynamic self-organizing routing algorithm was proposed.In order to solve the problem that the time domain features of the reconstructed signal were difficult to accurately classify the fault type,a new time domain feature,the total variation (TV) of the vibration signal,was introduced for the reconstructed signal,and the compensation distance estimation algorithm was adopted to verify the superiority of the introduction of indicators.The analysis of the measured data of the coal preparation plant shows that the proposed multi-source information transmission and classification algorithm can effectively improve the fault recognition accuracy under the condition of improving the real-time transmission efficiency of the monitoring data.…”
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