Filters








168 Hits in 4.8 sec

Sparse Code Multiple Access: Potentials and Challenges

Manel Rebhi, Kais Hassan, Kosai Raoof, Pascal Charge
2021 IEEE Open Journal of the Communications Society  
Sparse code multiple access (SCMA) is one of the powerful schemes of code-domain NOMA (CD-NOMA) and is among the promising candidates of multiple access techniques to be employed in future generations  ...  of wireless communication systems thanks to the sparsity pattern of its codebooks.  ...  equality spread based NOMA system, this NOMA scheme employs low-correlation spreading signatures.  ... 
doi:10.1109/ojcoms.2021.3081166 fatcat:asq4vwdswzh37imgpdku7ipkiq

Experimental Evaluation of STBC and CDD for Reliable Downlink Communication

Masafumi Moriyama, Kenichi Takizawa, Hayato Tezuka, Fumihide Kojima
2020 IEICE Communications Express  
We deal with two transmit diversity (TD) techniques, space-time block coding (STBC) and cyclic delay diversity (CDD), which are evaluated by experimentations in real environments.  ...  To enhance the reliability of DL, the use of spatial diversity is a promising technique.  ...  In UL, we have already adapted receive diversity (RD) and repetition to improve the reliability [1] . This paper focuses on the DL.  ... 
doi:10.1587/comex.2020xbl0037 fatcat:utpo4e3jazcftkczobhpu3ra7m

A Systematic Review on NOMA Variants for 5G and Beyond

Ishan Budhiraja, Neeraj Kumar, Sudhanshu Tyagi, Sudeep Tanwar, Zhu Han, Doug Young Suh, MD. Jalil Piran
2021 IEEE Access  
RECEIVER DESIGN The SIC employed receiver, the complexity, and error propagation degrade the performance of the users.  ...  They integrated NOMA in this system to correlate the users' channel.  ... 
doi:10.1109/access.2021.3081601 fatcat:mzmmr3km5zehhh3fnupyelfo3e

Non-Orthogonal Multiple Access for 5G and Beyond [article]

Yuanwei Liu, Zhijin Qin, Maged Elkashlan, Zhiguo Ding, Arumugam Nallanathan, Lajos Hanzo
2018 arXiv   pre-print
Finally, we offer some design guidelines for NOMA systems and identify promising research opportunities for the future.  ...  , on the interplay between NOMA and cooperative transmission, on the resource control of NOMA, on the co-existence of NOMA with other emerging potential 5G techniques and on the comparison with other NOMA  ...  The corresponding performance was experimentally evaluated with the aid of a multipath fading simulator [56].  ... 
arXiv:1808.00277v1 fatcat:jgxujmeifbedhlul2szgkgsayq

Nonorthogonal Multiple Access for 5G and Beyond

Yuanwei Liu, Zhijin Qin, Maged Elkashlan, Zhiguo Ding, Arumugam Nallanathan, Lajos Hanzo
2017 Proceedings of the IEEE  
Finally, we offer some design guidelines for NOMA systems and identify promising research opportunities for the future.  ...  , on the interplay between NOMA and cooperative transmission, on the resource control of NOMA, on the co-existence of NOMA with other emerging potential 5G techniques and on the comparison with other NOMA  ...  The corresponding performance was experimentally evaluated with the aid of a multipath fading simulator [56] .  ... 
doi:10.1109/jproc.2017.2768666 fatcat:kpplouvkwbfurhitb3plb3y73m

Interference in multi-user optical wireless communications systems

Iman Abdalla, Michael B. Rahaim, Thomas D. C. Little
2020 Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences  
The use of many units provides scaling of spatial coverage for both lighting and data access.  ...  Visible light communications (VLC) (including LiFi) represent a subset of the broader field of optical wireless communications.  ...  [38] , who study joint detection (JD) of VLC signals employing NOMA for the uplink (UL) where they suggest that transmitters use JD which is based on the maximum-likelihood detection and provides enhanced  ... 
doi:10.1098/rsta.2019.0190 pmid:32114917 pmcid:PMC7062004 fatcat:ruoh3spa5vcmvmcrchpyk5vyx4

2019 Index IEEE Transactions on Communications Vol. 67

2019 IEEE Transactions on Communications  
Nguyen, H.T., +, LMMSE Receivers in Uplink Massive MIMO Systems With Correlated Rician Fading.  ...  ., +, TCOMM April 2019 2746-2762 LMMSE Receivers in Uplink Massive MIMO Systems With Correlated Rician Fading.  ...  S Satellite antennas On the Performance of LMS  ... 
doi:10.1109/tcomm.2019.2963622 fatcat:qd6so3reavde3eiukfknmpbfsu

Multidimensional Index Modulation for 5G and Beyond Wireless Networks [article]

Seda Dogan-Tusha, Armed Tusha, Ertugrul Basar, Huseyin Arslan
2020 arXiv   pre-print
at the expense of higher transmitter (Tx) and receiver (Rx) complexity.  ...  This study examines the flexible utilization of existing IM techniques in a comprehensive manner to satisfy the challenging and diverse requirements of 5G and beyond services.  ...  [31] 2014 Space General aspects of SM-MIMO, its experimental evaluation and its integration with the promising communication systems have been presented.  ... 
arXiv:2010.00850v1 fatcat:mgnaniaegrecjner6nkjwc75v4

Scoring the Terabit/s Goal:Broadband Connectivity in 6G [article]

Nandana Rajatheva, Italo Atzeni, Simon Bicais, Emil Bjornson, Andre Bourdoux, Stefano Buzzi, Carmen D'Andrea, Jean-Baptiste Dore, Serhat Erkucuk, Manuel Fuentes, Ke Guan, Yuzhou Hu (+17 others)
2021 arXiv   pre-print
This paper explores the road to vastly improving the broadband connectivity in future 6G wireless systems. Different categories of use cases are considered, with peak data rates up to 1 Tbps.  ...  At the spectrum level, the network must seamlessly utilize sub-6 GHz bands for coverage and spatial multiplexing of many devices, while higher bands will be mainly used for pushing the peak rates of point-to-point  ...  On the uplink, instead, denoting by P UL max the maximum power available at each UE, for the UPA-UL we let η UL k = P UL max , ∀ k = 1, . . . , K, while for the FPA-UL we have η UL k = min P UL max , P  ... 
arXiv:2008.07220v2 fatcat:k4yyvxjguzeqtgewy4bxmnmuo4

Intelligent D-Band wireless systems and networks initial designs

Marco Di Renzo, Xuewen Qian, Halid Hrasnica, Nikos Katzouris, Kyriakos Manganaris, Dimitris Selimis, Fotis Lazarakis, Tachporn Sanguanpuak, Heikki Halmetoja, Moamen Ibrahim, Edwin Yaqub, Rachana Desai (+5 others)
2021 Zenodo  
It presents the work conducted on various aspects of network management to deliver system level, qualitative solutions that leverage diverse machine learning techniques.  ...  system level model for proactive handovers and resource allocation, model-driven deep learning-based channel estimation and feedbacks as well as strategies for deployment of machine learning based solutions  ...  the dynamic decoding order of a NOMA scheme, in a RIS-UAV assisted THz wireless system.  ... 
doi:10.5281/zenodo.5718378 fatcat:l3rkacgotzazha564nqm6wchiy

2020 Index IEEE Transactions on Vehicular Technology Vol. 69

2020 IEEE Transactions on Vehicular Technology  
., On the Performance of MIMO Full-Duplex Relaying System With SWIPT Under Outdated CSI; TVT Dec. 2020 15580-15593 Hodtani, G.A., see Gholami, R., TVT Sept. 2020 9938-9950 Hoki, K., see Kawakami, T  ...  ., TVT Dec. 2020 16168-16172 Hong, C., Shan, H., Song, M., Zhuang, W., Xiang, Z., Wu, Y., and Yu, X., A Joint Design of Platoon Communication and Control Based on LTE-V2V; 15893-15907 Hong, C.S., see  ...  ., +, TVT June 2020 5923-5932 Automatic repeat request Achievable Diversity Order of HARQ-Aided Downlink NOMA Systems.  ... 
doi:10.1109/tvt.2021.3055470 fatcat:536l4pgnufhixneoa3a3dibdma

A Survey on Recent Trends and Open Issues in Energy Efficiency of 5G

Muhammad Usama, Melike Erol-Kantarci
2019 Sensors  
This demand has been met so far by employing sophisticated transmission techniques including massive Multiple Input Multiple Output (MIMO), millimeter wave (mmWave) bands as well as bringing the computational  ...  This paper surveys the recent works that address energy efficiency of the radio access as well as the core of wireless networks, and outlines related challenges and open issues.  ...  [41] Concept and practical considerations of non-orthogonal multiple access (NOMA) for future radio access [42] Optimum received power levels of UL NOMA signals for EE improvement [43] Spectral  ... 
doi:10.3390/s19143126 fatcat:4vo6bolowbdcxpl22mgzymz5ju

Large-Scale Wireless-Powered Networks with Backscatter Communications – A Comprehensive Survey

Fatemeh Rezaei, Chintha Tellambura, Sanjeewa Herath
2020 IEEE Open Journal of the Communications Society  
INDEX TERMS Backscatter communication systems, wireless-powered networks, large-scale communication systems, IoT networks, and massive machine type communications. both technical and theoretical perspectives  ...  Therefore, backscatter communication is a key facilitator for low-rate, low-power and large-scale wireless communication systems with EH.  ...  diversity gain and thus enhance communication reliability and lower the bit-error-rate of conventional radio backscatter systems [104] , [193] .  ... 
doi:10.1109/ojcoms.2020.3012466 fatcat:jlsmjscegzcb5kutdh4lna6khu

Towards Enhanced Mobile Broadband Communications: A Tutorial on Enabling Technologies, Design Considerations, and Prospects of 5G and beyond Fixed Wireless Access Networks

Isiaka A. Alimi, Romil K. Patel, Nelson J. Muga, Armando N. Pinto, António L. Teixeira, Paulo P. Monteiro
2021 Applied Sciences  
The concepts of virtualized RANs for attending flexibly to the dynamic nature of different use cases are also presented.  ...  Besides, we review various transport network options that can be employed for FWA deployment. In this regard, we offer an in-depth discussion on their related requirements for different use cases.  ...  Performance Evaluation of FWA System This section presents different criteria to be considered in the evaluation of the FWA system.  ... 
doi:10.3390/app112110427 fatcat:obtutczqvfc5tniclge57y7j4m

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

Muddasar Naeem, Giuseppe De Pietro, Antonio Coronato
2021 Sensors  
The recent success of RL and DL introduces novel and powerful tools that mitigate issues in MIMO communication systems.  ...  MIMO systems and their variants (i.e., Multi-User MIMO and Massive MIMO) are the most promising 5G wireless communication systems technology due to their high system throughput and data rate.  ...  Smart antennas get the benefit of spatial diversity technique that makes surplus antennas useful. The antennas can increase the range by adding receiver diversity when outnumbered spatial streams.  ... 
doi:10.3390/s22010309 pmid:35009848 pmcid:PMC8749942 fatcat:2w4th63dtrdyboa6rmhr5rcvja
« Previous Showing results 1 — 15 out of 168 results