Results 261 to 270 of about 105,525 (290)

Sub-Carrier and Band Hopped Orthogonal Frequency Division Multiple Access (OFDMA) Systems

Wireless Personal Communications, 2008
This article proposes a novel way of grouping users in an orthogonal frequency division multiplexing (OFDM) communication link based on predefined criteria. The total available spectrum is divided into a number of bands equal to the number of groups. For efficient time-frequency resource allocation, sub-carrier and band hopping are used simultaneously.
Muhammad Imadur Rahman, Ragnar Reynisson, Daniel Figueiredo, Ramjee Prasad   +3 more
openaire   +1 more source

Subcarrier allocation in multi-hop orthogonal frequency division multiple access wireless networks

Computers & Electrical Engineering, 2014
Graphical abstractDisplay Omitted We consider a multi-hop network situation instead of traditional two-hop topologies in OFDMA network.We adopt Tabu searching algorithm to reduce the possibility of choosing low-quality subcarriers.Our methods can combine the link groups with subcarrier groups in a global optimization method.Our proposed algorithms can ...
Qingyang Song, Yang Huang, Zhaolong Ning, Fanzhao Wang   +3 more
openaire   +1 more source

Block Allocation Strategy for Multiple Input Multiple Output (MIMO)–Orthogonal Frequency Division Multiple Access (OFDMA) System

Wireless Personal Communications, 2018
The challenge of next generation mobile wireless networks necessitates efficient usage of available spectrum. The multiple input multiple output (MIMO)–orthogonal frequency division multiple access (OFDMA) technology exploits spatial and frequency diversity completely to maximize the usage of the limited available spectrum.
J. Benita, R. Jayaparvathy
openaire   +1 more source

Uncoordinated orthogonal frequency division multiple access: To spread or not to spread

IEEE Transactions on Wireless Communications, 2009
We study uncoordinated multiple access using the orthogonal frequency division multiple access (OFDMA) technique where multiple users independently and randomly pick a sub-carrier from a set of sub-carriers for transmission in each slot. Signals transmitted on distinct sub-carriers are orthogonal to each other while signals transmitted by different ...
openaire   +1 more source

Chimeric antigen receptor T‐cell therapy in multiple myeloma: A comprehensive review of current data and implications for clinical practice

Ca-A Cancer Journal for Clinicians, 2023
Rujul Parikh
exaly  

Radio Resource Management for Orthogonal Frequency Division Multiple Access Systems

2005
Electrical Engineering, Mathematics and Computer ...
openaire   +1 more source

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends

IEEE Communications Surveys and Tutorials, 2022
Yijie Mao, Onur Dizdar, Bruno Clerckx
exaly  

Grant-Free Non-Orthogonal Multiple Access for IoT: A Survey

IEEE Communications Surveys and Tutorials, 2020
Muhammad Basit Shahab, Rana Abbas, Mahyar Shirvanimoghaddam   +2 more
exaly  

Composite Multiple-Mode Orthogonal Frequency Division Multiplexing With Index Modulation

IEEE Transactions on Wireless Communications, 2023
Jun Li, Shuping Dang, Yu Huang
exaly  

Sub-carrier and band hopped orthogonal frequency division multiple access (OFDMA) systems

2009
This article proposes a novel way of grouping users in an orthogonal frequency division multiplexing (OFDM) communication link based on predefined criteria. The total available spectrum is divided into a number of bands equal to the number of groups. For efficient time-frequency resource allocation, sub-carrier and band hopping are used simultaneously.
Rahman, Muhammad Imadur, Reynisson, Ragnar Vidir, Figueiredo, Daniel Vaz Pato, Prasad, Ramjee   +3 more
openaire   +1 more source