Results 51 to 60 of about 5,516 (118)
Transceiver design and performance analysis for uplink SCMA based on CP-free OFDM
Dianxin kexue, 2021 A typical sparse code multiple access (SCMA) system utilizes orthogonal frequency division multiplexing (OFDM) technology with cyclic prefix (CP) to combat multipath fading in wireless channels.Therefore, its capacity is reduced by the CP-insertion.To ...
Li ZHOU, Xiqing LIU
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Low Complexity ZF Receiver Design for Multi-User GFDMA Uplink Systems
IEEE Access, 2018 This paper presents a low complexity receiver for multi-user uplink transmission using generalized frequency division multiplexing (GFDM). By exploiting the frequency spreading filter in the GFDM, the banded and circulant properties of the frequency ...
Hong Wang, Rongfang Song
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Tongxin xuebao, 2012 Resource allocation issue in uplink OFDMA multi-hop relay networks was investigated.Firstly,with constraints such as maximum transmission power being imposed,a multi-cell optimization model for resource allocation in uplink OFDMA multi-hop relay networks
Zheng XIANG, Xu-ming FANG, Peng XU
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New Journal of PhysicsDriven by the necessitates of wide-area quantum secure communication networks, ground-to-satellite quantum key distribution (QKD) has been highlighted in the field of quantum information.
Jin Cheng +9 more
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In Situ Assessment of Uplink Duty Cycles for 4G and 5G Wireless Communications
SensorsIn this presented study, we measured in situ the uplink duty cycles of a smartphone for 5G NR and 4G LTE for a total of six use cases covering voice, video, and data applications.
Günter Vermeeren +4 more
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Enhanced Handoff Scheme for Downlink-Uplink Asymmetric Channels in Cellular Systems
The Scientific World Journal, 2013 In the latest cellular networks, data services like SNS and UCC can create asymmetric packet generation rates over the downlink and uplink channels. This asymmetry can lead to a downlink-uplink asymmetric channel condition being experienced by cell edge ...
Sunghyun Cho, Ji-Su Kim, Jae-Hyun Kim
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AutomationWe study UAV-assisted 5G uplink connectivity for disaster response, in which a UAV (unmanned aerial vehicle) acts as an aerial base station to restore service to ground users.
Abid Mohammad Ali +7 more
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Self-optimizing Uplink Outer Loop Power Control for WCDMA Network [PDF]
Radioengineering, 2015 The increasing demands for high data rates, drives the efforts for more efficient usage of the finite natural radio spectrum resources. Existing wideband code division multiple access (WCDMA) uplink outer loop power control has difficulty to answer to ...
A. G. Markoc, G. Sisul
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Mechanism of joint physical layer and MAC layer for handling multi-TRP UL overlapping transmissions
Tongxin xuebaoTo address the severe uplink (UL) overlapping transmission problem caused by multi-timing advance (multi-TA) in multiple transmission reception point (multi-TRP) scenario with non-ideal feedback, where existing protocols were difficult to handle ...
JING Xiaorong +3 more
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天地一体化信息网络The deployment of large-scale LEO satellite constellations is rapidly advancing, enabling seamless global coverage and supporting a wide range of applications.However, this proliferation of satellites also brings significant security concerns, including ...
ZENG Shulei, CAO Bin
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