Results 41 to 50 of about 22,554 (188)
A NEW DISCRETE HARTLEY TRANSFORM PRECODING BASED INTERLEAVED-OFDMA UPLINK SYSTEM WITH REDUCED PAPR FOR 4G CELLULAR NETWORKS [PDF]
Journal of Engineering Science and Technology, 2011 High peak-to-average power ratio (PAPR) reduction is one of the major challenges in orthogonal frequency division multiple access (OFDMA) systems since last decades. High PAPR increases the complexity of analogue-to-digital (A/D) and digital-to-analogue (
VARUN JEOTI, IMRAN BAIG
doaj
Adaptive Video Transmission for OFDMA Systems [PDF]
Multimedia and Expo, 2007 IEEE International Conference on, 2007 An adaptive framework is proposed for multi-user video transmission over orthogonal frequency division multiple access (OFDMA) systems. Utilizing the channel knowledge, a two-step heuristic sub-carrier assignment algorithm is proposed to achieve unequal error protection for the video data.
Shen, D, Li, VOK, Yang, GH
openaire +2 more sources
Coexistence of OFDM and FBMC for Underlay D2D Communication in 5G Networks [PDF]
, 2016 Device-to-device (D2D) communication is being heralded as an important part of the solution to the capacity problem in future networks, and is expected to be natively supported in 5G.
Bader, Faouzi +5 more
core +2 more sources
Artificial Noise Aided Secrecy Information and Power Transfer in OFDMA Systems
, 2016 In this paper, we study simultaneous wireless information and power transfer (SWIPT) in orthogonal frequency division multiple access (OFDMA) systems with the coexistence of information receivers (IRs) and energy receivers (ERs).
Liu, Yuan, Zhang, Meng, Zhang, Rui
core +1 more source
Reduced Feedback Designs for SDMA-OFDMA Systems [PDF]
2009 IEEE International Conference on Communications, 2009 In SDMA-OFDMA wireless communication systems, the feedback load increases with the number of users, subcarriers and antennas in the cell. In this paper, we propose two efficient reduced feedback algorithms by selecting the clusters at the user side. For each cluster, we select the users according to their norm and their orthogonality.
Ozbek, Berna, Le Ruyet, Didier
openaire +3 more sources
Robust Spectral and Energy Efficiency Tradeoff for RIS‐Aided Multi‐User Communication
IET Communications, Volume 20, Issue 1, January/December 2026.In this work, an RIS‐aided multi‐user network with imperfect CSI is investigated. Correspondingly, we focus on balancing SE and EE through the collaborative design of the base station (BS)'s precoding matrix and the RIS's phase shifts, which consider the transmit power budget and the channel uncertainties constraints.
Xiandeng He, Yilin Wang, Shun Zhang
wiley +1 more source
Energy-Efficient OFDM Radio Resource Allocation Optimization With Computational Awareness: A Survey
IEEE Access, 2022 In this paper, we review radio resource optimization methods for energy-efficient wireless communication in links and networks using the Orthogonal Frequency Division Multiplexing (OFDM) and Orthogonal Frequency Division Multiple Access (OFDMA ...
Bartosz Bossy +2 more
doaj +1 more source
Performance evaluation of mobile WiMAX with MIMO and relay extensions [PDF]
, 2007 The latest mobile WiMAX standard promises to deliver high data rates over extensive areas and to large user densities. More specifically, data rates are expected to exceed those of conventional cellular technologies.
Bian, YQ, Nix, AR, Strauch, P, Sun, Y
core +2 more sources
IET Communications, Volume 20, Issue 1, January/December 2026.This paper investigates new radio spectrum coexistence mechanisms, leveraging the currently uninhabited 6 GHz bands and aiming for fair coexistence of Wi‐Fi 6 and 5G new radio unlicensed (NR‐U). A novel two‐stage channel contention mechanism is proposed to explore additional spectrum access opportunities which remain unrealized in the existing channel ...
Md Toufiqur Rahman +2 more
wiley +1 more source
A Comparison of Reinforcement Learning Algorithms in Fairness-Oriented OFDMA Schedulers
Information, 2019 Due to large-scale control problems in 5G access networks, the complexity of radio resource management is expected to increase significantly. Reinforcement learning is seen as a promising solution that can enable intelligent decision-making and reduce ...
Ioan-Sorin Comșa +5 more
doaj +1 more source