Results 211 to 220 of about 252,451 (254)
Blood Transfusion Practices in Rural Hospitals: Indications, Challenges, and Practical Solutions. [PDF]
CureusTopno VR, Bihari G, Mishra G, Kumar D.
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Survival after severe blunt cardiac injury: Right atrial rupture. [PDF]
Trauma Case RepRichards J +3 more
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Massive Access for 5G and Beyond [PDF]
IEEE Journal on Selected Areas in Communications, 2021 Massive access, also known as massive connectivity or massive machine-type communication (mMTC), is one of the main use cases of the fifth-generation (5G) and beyond 5G (B5G) wireless networks. A typical application of massive access is the cellular Internet of Things (IoT).
Xiaoming Chen +2 more
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Massive Uncoordinated Access With Massive MIMO: A Dictionary Learning Approach
IEEE Transactions on Wireless Communications, 2020 Massive machine-type communications (mMTC) or massive Internet of things (IoT) is one of the key application scenarios of fifth generation (5G) and beyond cellular networks. Since initial access procedures of legacy systems are not suitable for massive connectivity due to increased collision probability and prohibitive overhead, it is of great interest
Yonghee Han +2 more
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Massive Grant-Free Access With Massive MIMO and Spatially Coupled Replicas
IEEE Transactions on Communications, 2022 Massive multiple access schemes, capable of serving a large number of uncoordinated devices while fulfilling reliability and latency constraints, are proposed. The schemes belong to the class of grant-free coded random access protocols and are tailored to massive multiple input multiple output (MIMO) base station processing.
Lorenzo Valentini +2 more
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Structured Massive Access for Scalable Cell-Free Massive MIMO Systems [PDF]
IEEE Journal on Selected Areas in Communications, 2021 How to meet the demand for increasing number of users, higher data rates, and stringent quality-of-service (QoS) in the beyond fifth-generation (B5G) networks? Cell-free massive multiple-input multiple-output (MIMO) is considered as a promising solution, in which many wireless access points cooperate to jointly serve the users by exploiting coherent ...
Shuaifei Chen +2 more
exaly +3 more sources
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2020 IEEE 20th International Conference on Communication Technology (ICCT), 2020
In this paper, the massive random access scenario that a part of users transmit both common and user-specific information and the others transmit only common information is considered, and a mixed massive random access scheme is proposed. In the proposed scheme, the common information is transmitted by unsourced random access (URA) technique, and the ...
Zijie Liang, Jianping Zheng
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In this paper, the massive random access scenario that a part of users transmit both common and user-specific information and the others transmit only common information is considered, and a mixed massive random access scheme is proposed. In the proposed scheme, the common information is transmitted by unsourced random access (URA) technique, and the ...
Zijie Liang, Jianping Zheng
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On the design of massive access
2017 9th International Conference on Wireless Communications and Signal Processing (WCSP), 2017In this paper, we design a fully non-orthogonal communication framework for spectral-efficient massive access. Firstly, we propose a non-orthogonal channel estimation (NOCE) method, which can achieve a balance between channel state information (CSI) accuracy and the length of pilot sequence. Then, we present a massive multiple-input multiple-out (MIMO)
Xiaoming Chen 0001 +3 more
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Random Access with Massive-Antenna Arrays
2016 IEEE 83rd Vehicular Technology Conference (VTC Spring), 2016Recently massive multi-input multi-output (MIMO) techniques have attracted growing research interest. However, most existing works assume centralized control, which may involve a heavy overhead as the number of users also becomes massive. In this paper, we focus on random-access massive MIMO systems.
Chongbin Xu, Xin Wang 0003, Ping Li 0009
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Low Complexity Activity Detection for Massive Access with Massive MIMO
2020 IEEE/CIC International Conference on Communications in China (ICCC), 2020We propose a low complexity activity detection scheme for massive access scenarios with massive multiple-input multiple-output (MIMO) communication systems. Numerous devices with sporadic access behavior characterize these scenarios; therefore, only a subset is active.
Yongxin Liu, Shidong Zhou
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