Results 71 to 80 of about 30,726 (232)

Using OFDMA for MU-MIMO User Selection in 802.11ax-Based Wi-Fi Networks

IEEE Access, 2019
Two innovative multi-user (MU) communication mechanisms, multi-user multi-input multi-output (MU-MIMO) and orthogonal frequency division multiple access (OFDMA), have recently attracted much attention as key technologies to boost the capabilities of 802 ...
Kyu-Haeng Lee
doaj   +1 more source

Resource Allocation for Outdoor-to-Indoor Multicarrier Transmission with Shared UE-side Distributed Antenna Systems

, 2015
In this paper, we study the resource allocation algorithm design for downlink multicarrier transmission with a shared user equipment (UE)-side distributed antenna system (SUDAS) which utilizes both licensed and unlicensed frequency bands for improving ...
Breiling, Marco, Burkhardt, Frank, Ng, Derrick Wing Kwan, Rohde, Christian, Schober, Robert   +4 more
core   +1 more source

OFDMA for Pinching-Antenna Systems

IEEE Communications Letters
Pinching-antenna (PA) systems route millimeter wave (mmWave) signals through a leaky waveguide and radiate them at "pinch" apertures, offering low-cost line-of-sight (LoS) coverage. However, when multiple PAs serve multiple users simultaneously, the downlink channel becomes strongly frequency-selective, creating inter-symbol interference (ISI) that ...
Thrassos K. Oikonomou, Sotiris A. Tegos, Panagiotis D. Diamantoulakis, Yuanwei Liu, George K. Karagiannidis   +4 more
openaire   +2 more sources

Design of a Hilbert Curve Fractal MIMO Slot Antenna With Enhanced Bandwidth and Stable Radiation Patterns for Wi‐Fi 7 and Wi‐Fi 8 Applications Using Genetic Algorithm

International Journal of Antennas and Propagation, Volume 2026, Issue 1, 2026.
Next‐generation Wi‐Fi 7 (IEEE 802.11be) and Wi‐Fi 8 (IEEE 802.11bn) demand compact multielement antennas offering wide bandwidth, high isolation, and stable radiation within limited device space. Conventional MIMO designs often face strong coupling, narrow bandwidth, or low efficiency, restricting high‐throughput multilink performance.
N. M. Mary Sindhuja, R. Sreelakshmy, Om Prakash Kumar, Muddineni Raveendra, Rajkishor Kumar   +4 more
wiley   +1 more source

RPDMA: A PAPR-Aware Multiple Access Scheme

IEEE Open Journal of Vehicular Technology
This article proposes a novel Multiple Access (MA) scheme called Ramanujan Periodic-subspace Division Multiple Access (RPDMA) for subcarrier sizes $N = 2^{m},\ m\in \mathbb {N}$, to address the high Peak-to-Average Power Ratio (PAPR) in Orthogonal ...
Goli Srikanth, Shaik Basheeruddin Shah, Nazar T. Ali, Vijay Kumar Chakka, Jorge Querol, Ahmed Altunaiji, Dragan I. Olcan   +6 more
doaj   +1 more source

Comparing GFDM With OFDM for Use in 6G Communication From a New Perspective

Journal of Electrical and Computer Engineering, Volume 2026, Issue 1, 2026.
The most important challenges facing 6G communication systems are the large amount of data and low latency as compared to previous generations. Therefore, it has become necessary to use advanced technologies to meet the requirements of 6G wireless communication systems.
Mohammed Azher Therib, Saad Saffah Hreshee, Martin Haardt   +2 more
wiley   +1 more source

Joint Subcarrier Allocation and Beamforming Optimization for IRS‐Assisted Multiuser MISO‐OFDMA Systems

Transactions on Emerging Telecommunications Technologies, Volume 36, Issue 7, July 2025.
We introduce a novel model of an IRS‐assisted MU‐MISO‐OFDMA system. We aim to jointly optimize beamforming vectors, IRS reflection coefficients, and OFDM subcarrier allocation to maximize the overall sum rate. ABSTRACT In this article, we propose a novel resource allocation strategy for multiuser multiple‐input single‐output orthogonal frequency ...
Binh‐Minh Vu, Oh‐Soon Shin
wiley   +1 more source

Joint Scheduling and Resource Allocation in the OFDMA Downlink: Utility Maximization under Imperfect Channel-State Information

, 2011
We consider the problem of simultaneous user-scheduling, power-allocation, and rate-selection in an OFDMA downlink, with the goal of maximizing expected sum-utility under a sum-power constraint.
Aggarwal, Rohit, Assaad, Mohamad, Koksal, C. Emre, Schniter, Philip   +3 more
core   +2 more sources

Green communication systems via a wavefront multiplexing technique

Systems Engineering, Volume 28, Issue 1, Page 5-14, January 2025.
Abstract A green communication scheme using an orthogonal wavefront (WF) multiplexing (Muxing) scheme spatially combined with orthogonal frequency‐division multiplexing (OFDM) techniques is proposed. It forms a spatial WF OFDM transceiver. The WF Muxing technique serves as the preprocessing and postprocessing method of the WF OFDM transceiver.
Hen‐Geul Yeh, Joe Lee
wiley   +1 more source

Analytical Evaluation of the Performance of Proportional Fair Scheduling in OFDMA-Based Wireless Systems

Journal of Electrical and Computer Engineering, 2012
This paper provides an analytical evaluation of the performance of proportional fair (PF) scheduling in Orthogonal Frequency-Division Multiple Access (OFDMA) wireless systems.
Mohamed H. Ahmed, Octavia A. Dobre, Rabie K. Almatarneh   +2 more
doaj   +1 more source