Results 51 to 60 of about 498,835 (335)
The Journal of Engineering, 2019 New non-orthogonal multiple access technology is proposed with the development of 5G, which is expected to support higher spectrum efficiency and massive terminal access, it enables the communication system to achieve better bit error rate performance ...
Qing Wang +3 more
doaj +1 more source
Cache-Aided Non-Orthogonal Multiple Access [PDF]
2018 IEEE International Conference on Communications (ICC), 2018 In this paper, we propose a novel joint caching and non-orthogonal multiple access (NOMA) scheme to facilitate advanced downlink transmission for next generation cellular networks. In addition to reaping the conventional advantages of caching and NOMA transmission, the proposed cache-aided NOMA scheme also exploits cached data for interference ...
Lin Xiang 0001 +5 more
openaire +3 more sources
Grant-Free Non-Orthogonal Multiple Access for IoT: A Survey [PDF]
IEEE Communications Surveys and Tutorials, 2019 Massive machine-type communications (mMTC) is one of the main three focus areas in the 5th generation (5G) of wireless communications technologies to enable connectivity of a massive number of Internet of things (IoT) devices with little or no human ...
M. Shahab +3 more
semanticscholar +1 more source
What Role Do Intelligent Reflecting Surfaces Play in Multi-Antenna Non-Orthogonal Multiple Access? [PDF]
IEEE wireless communications, 2020 Massive multiple-input multiple-output (MIMO) and non-orthogonal multiple access (NOMA) are two key techniques for enabling massive connectivity in future wireless networks.
A. S. D. Sena +8 more
semanticscholar +1 more source
Cooperative non-orthogonal multiple access with physical layer network coding [PDF]
, 2019 Physical layer network coding (PNC) has been proposed for information exchange between a pair of users assisted by a relay. However, the spectral efficiency of PNC reduces when the number of user pairs increases due to the requirement of orthogonal ...
Chee, Yen Leow, Chun, Yeen Ho
core +1 more source
Optimizing Non-Orthogonal Multiple Access in Random Access Networks [PDF]
2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), 2020 Non-orthogonal multiple access (NOMA) has been considered as a promising solution for improving the spectrum efficiency of next-generation wireless networks. In this paper, the performance of a p-persistent slotted ALOHA system in support of NOMA transmissions is investigated.
Ziru Chen +5 more
openaire +2 more sources
Multiple Access in Aerial Networks: From Orthogonal and Non-Orthogonal to Rate-Splitting
IEEE Open Journal of Vehicular Technology, 2020 Recently, interest on the utilization of unmanned aerial vehicles (UAVs) has aroused. Specifically, UAVs can be used in cellular networks as aerial users for delivery, surveillance, rescue search, or as an aerial base station (aBS) for communication with
Wael Jaafar +4 more
doaj +1 more source
Blind Joint Soft-Detection Assisted Slow Frequency-Hopping Multicarrier DS-CDMA [PDF]
, 2000 A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band ...
Lie-Liang Yang +3 more
core +1 more source
Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
IEEE Access, 2021 Non-orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. In uplink NOMA (UL-NOMA) systems, mobile multiusers are globally synchronized to share the same time and frequency resources, and transmit their own independent symbols ...
Hongjun Xu, Narushan Pillay
doaj +1 more source
Non-Orthogonal Multiple Access for Vehicular Communication [PDF]
2018 15th International Symposium on Wireless Communication Systems (ISWCS), 2018 In this paper, we establish a simple model for the exchange of messages in a vehicular network and we consider fundamental limits on the achievable data rate. For a vehicular network, the exchange of data with other nearby vehicles is particularly important for traffic safety, e.g.
Stephan Pfletschinger, Monica Navarro
openaire +2 more sources