Results 41 to 50 of about 15,137 (178)

Partially Overlapping NOMA System with Many Neighboring Channels

Journal of Communications Software and Systems
The increasing usage of the Internet of Things (IoT) and other modern massive machine-type communication applications has led to a growing demand for more efficient u tilization o f a vailable c ommunication bandwidth.
Zoltán Belso, László Pap
doaj   +1 more source

User Familiarity and Satisfaction With Food Delivery Mobile Apps

SAGE Open, 2020
The market for food delivery mobile applications (FDMAs) in South Korea has massively expanded due to the increase in both smartphone penetration rate and single-person households, thus marking a phase of severe competition.
Ju-Choel Choi
doaj   +1 more source

OFDMA/SC-FDMA aided space-time shift keying for dispersive multi-user scenarios

, 2013
Motivated by the recent concept of Space-Time Shift Keying (STSK) developed for achieving a flexible diversity versus multiplexing gain trade-off, we propose a novel Orthogonal Frequency Division Multiple Access (OFDMA)/Single Carrier Frequency Division ...
Chen, Sheng, Hanzo, Lajos, Mohammad, Ismat Kadir, Sugiura, Shinya, Zhang, Jiayi   +4 more
core   +1 more source

Two-User Gaussian Interference Channel with Finite Constellation Input and FDMA

, 2010
In the two-user Gaussian Strong Interference Channel (GSIC) with finite constellation inputs, it is known that relative rotation between the constellations of the two users enlarges the Constellation Constrained (CC) capacity region.
Abhinav, G., Rajan, B. Sundar
core   +1 more source

Communication‐Security Co‐Design for Federated Learning in Grant‐Free NOMA IoT Networks

IET Communications, Volume 20, Issue 1, January/December 2026.
This article presents SA‐PPO, a Security‐Aware Proximal Policy Optimisation framework for federated learning over grant‐free NOMA (non‐orthogonal multiple access) in IoT networks. By jointly optimising access control, resource allocation, and trust‐weighted aggregation using cross‐layer indicators, SA‐PPO enhances both communication reliability and ...
Emmanuel Atebawone, Kwame Opuni‐Boachie Obour Agyekum, James Dzisi Gadze, Kwasi Adu‐Boahen Opare, Owusu Agyeman Antwi, Robert Akromond   +5 more
wiley   +1 more source

ENHANCEMENT OF CODE DIVISION MULTIPLE ACCESS (CDMA) WITHIN THE GSM SYSTEM IN IRAQ

Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ
Despite the widespread adoption of Global System for Mobile Communications (GSM) in Iraq, the network's capacity and performance limitations have become increasingly apparent, particularly in urban areas with high user density. Currently, LTE (4G) is the
Nabil Abdulwahab Abdulrazaq Baban
doaj   +1 more source

Simulador de uma rede celular baseada no sistema FDMA (AMPS/TDMA).

Semina: Ciências Exatas e Tecnológicas, 2004
Este artigo descreve o modelo e a implementação de um simulador de uma rede celular baseada no sistema FDMA (AMPS/TDMA). O simulador tem como objetivo a avaliação do desempenho da rede celular FDMA e a otimização de certos parâmetros.
Ailton Akira Shinoda
doaj   +1 more source

A new GLONASS FDMA model [PDF]

GPS Solutions, 2019
We introduce a new formulation of the double-differenced GLONASS FDMA model. It closely resembles that of CDMA-based systems and it guarantees the estimability of the newly defined GLONASS ambiguities. The formulation is made possible because of our defining new concept of integer-estimability and the analytical construction of a special integer matrix
openaire   +3 more sources

Federated Split Learning for Large Language Models With RSMA

IET Communications, Volume 20, Issue 1, January/December 2026.
This study proposes a federated split learning framework for large language models (FedsLLM) integrated with rate‐splitting multiple access (RSMA), aimed at enhancing the efffciency and privacy of LLM training in wireless communication systems. ABSTRACT This study proposes a federated split learning framework for large language models (FedsLLM ...
Jianxin Dai, Rui Tang, Feibo Jiang, Zhaohui Yang, Qianqian Yang, Zhaoyang Zhang, Linqing Gui   +6 more
wiley   +1 more source

First dorsal metatarsal artery perforator flap to cover great toe defect

Journal of Orthopaedic Surgery, 2017
Background: There were very few options available for distal foot and toe defects that required a vascularized flap for coverage. As such, the use of a free flap was often justified in this region of the foot.
Roongsak Limthongthang, Perajit Eamsobhana   +1 more
doaj   +1 more source