Results 1 to 10 of about 324,548 (250)
The Strongly Asynchronous Massive Access Channel [PDF]
Entropy, 2022 This paper considers the Strongly Asynchronous, Slotted, Discrete Memoryless, Massive Access Channel (SAS-DM-MAC) in which the number of users, the number of messages, and the asynchronous window length grow exponentially with the coding blocklength with
Sara Shahi +2 more
doaj +5 more sources
User-Centric Cell-Free Massive MIMO with Low-Resolution ADCs for Massive Access [PDF]
SensorsThis paper proposes a heuristic association algorithm between access points (APs) and user equipment (UE) in user-centric cell-free massive multiple-input-multiple-output (MIMO) systems, specifically targeting scenarios where UEs share the same frequency
Jin-Woo Kim +7 more
doaj +4 more sources
A Left-Null-Space-Based Massive Access Method for Cell-Free Massive MIMO IoT Systems [PDF]
Sensors, 2023 Cell-free massive multiple-input multiple-output (MIMO) is a promising technology for the Internet of Things (IoT) because it can increase connectivity and provide considerable energy efficiency (EE) and spectral efficiency (SE).
Yang Wang, Die Hu
doaj +2 more sources
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).
Derrick Wing Kwan Ng +2 more
exaly +3 more sources
Preamble Design and Collision Resolution in a Massive Access IoT System [PDF]
Sensors, 2021 How to support massive access efficiently is one of the challenges in the future Internet of Things (IoT) systems. To address such challenge, this paper proposes an effective preamble collision resolution scheme to sustain massive random access (RA) for ...
Ailing Zhong +4 more
doaj +2 more sources
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 ...
Bo Ai, Jiayi Zhang, Emil Bjornson
exaly +3 more sources
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.
Marco Chiani +2 more
exaly +3 more sources
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
Bhaskar Rao, Yonghee Han, Jungwoo Lee
exaly +2 more sources
Compressive-Sensing-Based Grant-Free Massive Access for 6G Massive Communication [PDF]
IEEE Internet of Things JournalThe advent of the sixth-generation (6G) of wireless communications has given rise to the necessity to connect vast quantities of heterogeneous wireless devices, which requires advanced system capabilities far beyond existing network architectures. In particular, such massive communication has been recognized as a prime driver that can empower the 6G ...
Derrick Wing Kwan Ng +2 more
exaly +4 more sources
The challenges of M2M massive access in wireless cellular networks
Digital Communications and Networks, 2015 The next generation of communication systems, which is commonly referred to as 5G, is expected to support, besides the traditional voice and data services, new communication paradigms, such as Internet of Things (IoT) and Machine-to-Machine (M2M ...
Andrea Biral +4 more
doaj +3 more sources