Results 111 to 120 of about 8,421 (222)

Optimal dynamic subcarrier allocation for dual-band OFDMA-PON supporting integrated fronthaul and backhaul in 5G networks

ICT Express, 2018
We propose a novel dynamic subcarrier allocation (DSCA) design for dual-band orthogonal frequency division multiple access passive optical network (DB-OFDMA-PON), supporting integrated fronthaul and backhaul services, given their stringent requirements ...
Yazan M. Allawi, Geun Young Kim, Jungbum Cho, Ahmad G. Reza, Yongsoo Na, June-Koo Kevin Rhee   +5 more
doaj   +1 more source

OFDMA femtocells: A roadmap on interference avoidance

IEEE Communications Magazine, 2009
[EN] OFDMA femtocells have been pointed Out by the industry as a good solution not only to overcome the indoor coverage problem but also to deal with the growth of traffic within macrocells. However, the deployment of a new femtocell layer may have an undesired impact on the performance of the macrocell layer.
David López-Pérez, Alvaro Valcarce Rial, Guillaume de la Roche, Jie Zhang 0003   +3 more
openaire   +2 more sources

Enhancing Wi-Fi 6 spectrum access control with a heuristic OFDMA back-off mechanism

Results in Engineering
The IEEE 802.11ax standard, known as Wi-Fi 6, employs a centralized, multiuser, uplink Orthogonal Frequency Division Multiple Access (OFDMA)-based Random Access (UORA) mechanism to improve user efficiency and network capacity in dense environments. In Wi-
Abdul Rehman, Faisal Bashir Hussain, Rashid Ali, Hassan Jalil Hadi, Naveed Ahmad   +4 more
doaj   +1 more source

OFDMA Extension of NS-3 WiMAX Module

, 2010
An OFDMA TDD model extension of the NS-3 WiMAX module was created. The necessary background in 802.16 WiMAX standards is presented. Additions supporting OFDMA are presented along with the challenges encountered during development.
William P. Furlong, Ratan Guha, Furlong, William P., Guha, Ratan   +3 more
core   +1 more source

Trade-Off Analysis of NOMA-D2D and OFDMA-D2D Systems: Resource Allocation Perspective

IEEE Access
Mutual interference between NOMA cellular users (CUs) and D2D links poses a challenge in extending NOMA’s resource allocation schemes to NOMA-D2D models.
Najmeh Madani, Shabnam Sodagari
doaj   +1 more source

OFDMA MU-MIMO in Wi-Fi Networks: Opportunities and Challenges

reservedThe exponential growth of Wi-Fi-enabled devices and the changing nature of online activities highlight the urgent need to find innovative solutions to solve the ever-growing congestion issue, especially in highly dense environments where the ...
TRAVERSO, LINDA
core  

ANALISA KAPASITAS PADA SISTEM MIMO-OFDMA UNTUK ARAH DOWNLINK ( CAPACITY ANALYSIS ON DOWNLINK MIMO-OFDMA SYSTEM ) [PDF]

, 2008
ABSTRAKSI: Salah satu skema MIMO adalah spatial multiplexing yang menawarkan peningkatan data rate. Prinsipnya transmitter akan mengirimkan sinyal yang berbeda pada setiap cabang antenna transmit secara simultan.
Andi Zulfikar
core  

Mekanisme Alokasi Resource pada MIMO-OFDMA [PDF]

, 2008
ABSTRAKSI: Penggunaan layanan multimedia sudah menjadi suatu hal umum pada masa sekarang ini. Pertumbuhan permintaan layanan multimedia menuntut untuk ketersediaan bandwidth yang mencukupi. Pengguna juga meinginkan layanan yang bersifat bergerak.
Yudha Putra
core  

Optimized Selective OFDMA in multihop network

, 2012
Selective OFDMA is a powerfull relaying technique with subcarrier based selection. This scheeme has a high potential to considerably improve the performance of cooperative OFDM systems.
Besbes H., Hamila R., Hasna , Mazen, Abdelkefi F., Gouissem A.   +4 more
core   +1 more source

Efficient Space-Time Signal Processing Scheme of Frequency Synchronization and Positioning for Sensor Networks. [PDF]

Sensors (Basel), 2023
Wang YY, Huang JR.
europepmc   +1 more source