Results 11 to 20 of about 31,082 (236)
IET Networks, EarlyView., 2023 We utilise a metaheuristic optimisation method, inspired by nature, called the Lévy‐flight firefly algorithm (LFA), to tackle the power regulation and user grouping in the NOMA systems. Abstract The non‐orthogonal multiple access strategies have shown promise to boost fifth generation and sixth generation wireless networks' spectral efficiency and ...
Zaid Albataineh +4 more
wiley +1 more source
QoS-aware enhanced proportional faire scheduling algorithm for real-time services in LTE networks [PDF]
Computational Algorithms and Numerical Dimensions, 2023 The new generation of wireless networks (LTE advance and WIMAX) supports many services that consume many resources (such as VOIP, video conference …).
Mahnaz Sotoudeh Bahreyni +1 more
doaj +1 more source
Massive MU-MIMO downlink TDD systems with linear precoding and downlink pilots [PDF]
2013 51st Annual Allerton Conference on Communication, Control, and Computing (Allerton), 2013 We consider a massive MU-MIMO downlink time-division duplex system where a base station (BS) equipped with many antennas serves several single-antenna users in the same time-frequency resource. We assume that the BS uses linear precoding for the transmission.
Ngo, Hien Quoc +2 more
openaire +3 more sources
IEEE Access, 2022 Cell selection in cellular networks is an important aspect that impacts the quality of service. The traditional cell selection mechanism is based on downlink received power.
Kaveh Ahmadi +3 more
doaj +1 more source
Improving Downlink Scalability in LoRaWAN [PDF]
ICC 2019 - 2019 IEEE International Conference on Communications (ICC), 2019 Although LoRaWAN offers many advantages, one of its main limitation is the insufficient downlink capacity in large-scale scenarios. This makes reliable communication impractical as, in LoRaWAN, reliability is achieved through the acknowledgement of confirmed messages.
Valentina Di Vincenzo +2 more
openaire +1 more source
Resource Allocation for CoMP in Cellular Networks With Base Station Sleeping
IEEE Access, 2018 Base station sleeping (BSS) can result in significant reduction in energy consumption of cellular networks during low traffic conditions. We show that the coverage loss due to BSS can be compensated via coordinated multi-point (CoMP) -based transmission ...
Yoghitha Ramamoorthi, Abhinav Kumar
doaj +1 more source
IEEE Access, 2020 This work considers multiple user power-domain non-orthogonal multiple access (NOMA)based downlink (DL) and uplink (UL) communication systems with potentially dissimilar fading links for all the users that can follow one of several possible distributions
Akash Agarwal +3 more
doaj +1 more source
Buffer sharing on an OFDMA downlink
21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2010 In this work we consider the allocation of buffer space to data streams sharing a common high-speed wireless transmitter. As an example, we focus on an OFDMA-based downlink system scenario. Scheduling for maximum throughput has been extensively studied in the literature.
Tolga Girici +2 more
openaire +3 more sources
Novel Transmission Schemes for Multicell Downlink MC/DS-CDMA Systems Employing Time- and Frequency-Domain Spreading [PDF]
, 2013 This contribution investigates the achievable error performance of transmitter preprocessing in the downlink multicell multicarrier direct-sequence code-division multiple-access (MMC/DS-CDMA) systems employing both time (T)-domain and frequency (F ...
Yang, Lie-Liang +3 more
core +1 more source
Modeling of Downlink Interference in Massive MIMO 5G Macro-Cell
Sensors, 2021 Multi-beam antenna systems are the basic technology used in developing fifth-generation (5G) mobile communication systems. In practical implementations of 5G networks, different approaches are used to enable a massive multiple-input-multiple-output ...
Kamil Bechta +3 more
doaj +1 more source