Filters








890 Hits in 10.2 sec

Blind Multi-user Detection for Autonomous Grant-free High-Overloading MA without Reference Signal [article]

Zhifeng Yuan, Yuzhou Hu, Weimin Li, Jianqiang Dai
2017 arXiv   pre-print
In this paper, a novel blind multi-user detection(MUD) framework for autonomous grant-free high-overloading non-orthogonal multiple access is introduced in detail aimed at fulfilling the requirements of  ...  From the perspective of the transmitter side, pros and cons regarding diverse types of emerging grant-free transmission, particularly autonomous grant-free, are elaborated and presented in a comparative  ...  Blind Multi-user Detection for Autonomous Grant-free High-Overloading MA without Reference Signal However, it is much less efficient for irregular traffic such as event-driven non-periodic traffic [8]  ... 
arXiv:1712.02601v1 fatcat:k36xoadu4fgatayqe6r2jaiybq

Grant-free Non-orthogonal Multiple Access for IoT: A Survey [article]

Muhammad Basit Shahab, Rana Abbas, Mahyar Shirvanimoghaddam, Sarah J. Johnson
2019 arXiv   pre-print
autonomous and grant-free communication, where devices can transmit data whenever they need.  ...  To tackle this, grant-free access is needed, where mMTC devices can autonomously transmit their data over randomly chosen radio resources.  ...  Moreover, in order to enable grant-free transmission and minimize the overhead of control signaling, users choose their spreading sequences locally/autonomously, without coordination by eNB [133] .  ... 
arXiv:1910.06529v1 fatcat:6ouywssbwjhm3nt5iz6px7h7oa

Blind Receive Beamforming for Autonomous Grant-Free High-Overloading Multiple Access [article]

Zhifeng Yuan, Weimin Li, Yuzhou Hu, Xun Yang, Hong Tang, Jianqiang Dai
2018 arXiv   pre-print
Although spatial combining has provided significant gains in conventional grant-based transmission, this technique is stuck in dilemma when it comes to autonomous grant-free transmission tailored for IoT  ...  grant-free (AGF) transmission.  ...  Revolutionary Autonomous Grant-Free (AGF) access [6] [7] [8] allowing UE transmission directly from idle state can extremely simplify the transmitter design and is tailored for IoT systems in mMTC and  ... 
arXiv:1805.07013v1 fatcat:auwceq3dbjhdhfpqzdxn3akgh4

Contention-based Grant-free Transmission with Extremely Sparse Orthogonal Pilot Scheme [article]

Zhifeng Yuan, Zhigang Li, Weimin Li, Yihua Ma
2021 arXiv   pre-print
The numerical results show that the proposed extremely sparse orthogonal pilot scheme significantly improves the performance in high-overloading grant-free scenario.  ...  The proposed sparse pilot is used to perform active user detection and estimate the spatial channel.  ...  Grant-free transmission allows UEs to transmit data payloads autonomously without the need to send scheduling request and wait for dynamic scheduling.  ... 
arXiv:2106.04172v1 fatcat:p6rj6j3adbb7tmdr3vfnt7tefm

Grant-Free Non-Orthogonal Multiple Access: A Key Enabler for 6G-IoT [article]

Rana Abbas, Tao Huang, Basit Shahab, Mahyar Shirvanimoghaddam, Yonghui Li, Branka Vucetic
2020 arXiv   pre-print
We present novel and promising results for deep learning (DL)-based techniques for joint user detection and decoding.  ...  Then, we propose a multi-layered model for GF-NOMA for power-efficient communications.  ...  , and one for user detection.  ... 
arXiv:2003.10257v1 fatcat:owtfsqzvsjgqfacacriw5z24uu

Application of Reinforcement Learning and Deep Learning in Multiple-Input and Multiple-Output (MIMO) Systems

Muddasar Naeem, Giuseppe De Pietro, Antonio Coronato
2021 Sensors  
., Multi-User MIMO and Massive MIMO) are the most promising 5G wireless communication systems technology due to their high system throughput and data rate.  ...  Second, potential RL and DL applications for different MIMO issues, such as detection, classification, and compression; channel estimation; positioning, sensing, and localization; CSI acquisition and feedback  ...  Presents fundamental challenges related to signal detection, energy General aspects of efficiency, user scheduling, Ma-MIMO are [66] - 2020 Ma-MIMO precoding, channel estimation and considered without  ... 
doi:10.3390/s22010309 pmid:35009848 pmcid:PMC8749942 fatcat:2w4th63dtrdyboa6rmhr5rcvja

White Paper on Critical and Massive Machine Type Communication Towards 6G [article]

Nurul Huda Mahmood, Stefan Böcker, Andrea Munari, Federico Clazzer, Ingrid Moerman, Konstantin Mikhaylov, Onel Lopez, Ok-Sun Park, Eric Mercier, Hannes Bartz, Riku Jäntti, Ravikumar Pragada (+19 others)
2020 arXiv   pre-print
- How to tackle a disruptive rather than incremental joint design of a massively scalable waveform and medium access policy for global MTC connectivity?  ...  Impact on higher layers Impact on higher layers of grant-free When grant-free without any type of pre-assignment is employed, higher layers can be simplified without any connection state transition.  ...  Please refer to [3] and references therein for a detailed discussion.  ... 
arXiv:2004.14146v2 fatcat:mekkaybbovghfnbqz5bbizceki

A Survey on beyond 5G network with the advent of 6G: Architecture and Emerging Technologies

Anutusha Dogra, Rakesh Kumar Jha, Shubha Jain
2020 IEEE Access  
The architecture acts as the platform for migration towards beyond 5G/6G networks.  ...  The 5G network will revolutionize the existing wireless network with its enhanced capabilities and novel features. 5G New Radio (5G NR), referred to as the global standardization of 5G, is presently under  ...  In ultra-lean design, four primary reference signals like Phase Tracking Reference Signals (PTRS), Channel State Reference Signals (CSI-RS), Sounding Reference Signals (SRS), and Demodulation Reference  ... 
doi:10.1109/access.2020.3031234 fatcat:nt7ypjjpqvd4jdl5lvqkpcwnzm

Welcome Messages

2019 2019 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)  
In addition to the user fairness, we make the spatial streams which convey visually more important information be high-quality for achieving high video quality.  ...  This paper proposes a novel power allocation scheme for MU-MIMO systems, which minimizes the variance of channel capacities of each spatial stream of all users to achieve user fairness in terms of video  ...  Each user first searches the BS with the maximum reference signal received signal power (RSRP) plus the common offset value for all LP BSs.  ... 
doi:10.1109/ispacs48206.2019.8986291 fatcat:gu4zaxsqkncp5n2ebj5fybk7ce

A Survey on Non-Geostationary Satellite Systems: The Communication Perspective [article]

Hayder Al-Hraishawi, Houcine Chougrani, Steven Kisseleff, Eva Lagunas, Symeon Chatzinotas
2021 arXiv   pre-print
NGSO communication systems are known for a number of key features such as lower propagation delay, smaller size, and lower signal losses in comparison to the conventional geostationary orbit (GSO) satellites  ...  Finally, we outline a set of innovative research directions and new opportunities for future NGSO research.  ...  Chatzinotas, “Signal processing for high-throughput satellites: Chal- “A hierarchical autonomous system based space information network lenges in new interference-limited scenarios,” IEEE  ... 
arXiv:2107.05312v2 fatcat:dqov3icnibfdrhzxfwkhsykfcq

Track C

2014 Biomedical Engineering  
that finds appropriate parameter values autonomously.  ...  In experiments it is validated for two scenarios simulating inappropriate parameter values.  ...  The author would like to thank Christopher Dörr, THM, for helpful discussions and Youssef Belhoucine, THM, for help with ECG recording.  ... 
doi:10.1515/bmt-2014-5002 pmid:25385887 fatcat:duiajlu3i5gdffz5o4extkvyjm

Technologies for ABs

Alessandro Vizzarri, Mazzenga Franco, Giuliano Romeo, Vegni Anna Maria
2022 Zenodo  
), which are expected to be of interest for improving capabilities of the Adaptable Communication System (ACS).  ...  In the document a set of candidate communication technologies have been investigated as potential ones for railway applications.  ...  References  ... 
doi:10.5281/zenodo.6288927 fatcat:zjth5wswjvge5plvjrhpqutpde

A Review of Theoretical and Practical Challenges of Trusted Autonomy in Big Data

Hussein A. Abbass, George Leu, Kathryn Merrick
2016 IEEE Access  
Trusted autonomy is the scientific and engineering field to establish the foundations and ground work for developing trusted autonomous systems (robotics and software agents) that can be used in our daily  ...  We conjecture that the main inhibitor for advancing autonomy is lack of trust.  ...  With free-will arises full autonomy. An actor that is fully autonomous acts because it has the freedom to act.  ... 
doi:10.1109/access.2016.2571058 fatcat:hpwzuhpzpfeejacfrzub7mzzua

Body Area Networks: A Survey

Min Chen, Sergio Gonzalez, Athanasios Vasilakos, Huasong Cao, Victor C. M. Leung
2010 Journal on spesial topics in mobile networks and applications  
Acknowledgements This work was supported in part by the Canadian Natural Sciences and Engineering Research Council through grant STPGP 365208.  ...  As data sources of the BAN system, body sensors are used for collecting the vital signals of a user or patient.  ...  Multi-radio and multi-channel design Both synchronous and asynchronous MAC mechanisms can be used for scheduling and collision avoidance for BANs that utilize two radios.  ... 
doi:10.1007/s11036-010-0260-8 fatcat:2pldyqtl35ezbmarnycj2ee44a

BATS: Adaptive Ultra Low Power Sensor Network for Animal Tracking

Niklas Duda, Thorsten Nowak, Markus Hartmann, Michael Schadhauser, Björn Cassens, Peter Wägemann, Muhammad Nabeel, Simon Ripperger, Sebastian Herbst, Klaus Meyer-Wegener, Frieder Mayer, Falko Dressler (+6 others)
2018 Sensors  
Flight trajectories of individual tagged bats can be recorded at high spatial and temporal resolution by a ground node grid.  ...  Funding: This work is funded by German Science Foundation DFG grant FOR 1508, Research Unit BATS "Dynamic Adaptable Applications for Bat Tracking by Embedded Communicating Systems".  ...  batteries, allowing for an autonomous and self-sustaining operation.  ... 
doi:10.3390/s18103343 fatcat:svs34po2tjhw7okadj5y3lsihu
« Previous Showing results 1 — 15 out of 890 results