Results 81 to 90 of about 4,474,307 (216)

Proposta de um esquema MIMO-OFDM com máxima diversidade em frequência para canais variantes no tempo [PDF]

, 2007
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.O projeto de sistemas de comunicação sem fio, com o propósito de minimizar a probabilidade de erro de bits, é um ...
Yoshimura, Ricardo Seiti
core  

Multiuser MIMO-OFDM Systems using Subcarrier Hopping

, 2006
Recently space division multiple access (SDMA) assisted multiple-input–multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems invoking multiuser detection (MUD) techniques have attracted substantial research interest, which is ...
Jiang, M, Hanzo, L
core   +1 more source

ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING [PDF]

, 2020
Orthogonal frequency division multiplexing (OFDM) is a method of modulation of digital signal ...
Priti Dhama, Pallavi Goel
core  

Estudo de técnicas de formatação de feixe para transmissão OFDM [PDF]

, 2004
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Engenharia ElétricaEsta dissertação apresenta um estudo do comportamento de diversos algoritmos adaptativos capazes de realizar a formatação
Lima, Gustavo Corrêa
core  

Orthogonal Frequency Division Diversity and Multiplexing for 6G OWC: Principle and Underwater Use Case

Photonics
In this paper, we, for the first time, propose and demonstrate an orthogonal frequency division diversity and multiplexing (OFDDM) scheme for the sixth-generation (6G) underwater optical wireless communication (UOWC) systems.
Jiamin Chen, Chen Chen, Zhihong Zeng, Min Liu, Jia Ye, Cuiwei He, Shenjie Huang, H. Y. Fu, Harald Haas   +8 more
doaj   +1 more source

Inter-Carrier Interference Analysis of OFDM Systems Communicating Over Rapidly-Fading Nakagami-m Channels

, 2006
In this contribution, the Bit Error Rate (BER) performance of OFDM systems using coherent demodulation over time-variant flat Nakagami-m fading channels is analyzed.
Zhang, J.M, Liu, X., Yang, L-L., Hanzo, L.   +3 more
core   +1 more source

Review of the channel coding, O-OFDM, and synchronization techniques of O-OFDM used in visible light communication systems

Cogent Engineering
Optical Wireless Communication (OWC) systems offer numerous benefits, such as increased bandwidth, access to an unregulated spectrum, immunity to electromagnetic interference, and the ability to reuse the spectrum effectively.
Praveen Yadav, Sangeetha R. G.
doaj   +1 more source

Peak-to-average Power Ratio of Orthogonal Frequency Division Multiplexing [PDF]

, 2002
Orthogonal frequency division multiplexing (OFDM) is successfully used in many wireless digital communication systems over multipath channels. One of the principal disadvantages of OFDM is the occurrence of high peak to average power ratios (PAR). Many
Jayalath, Dhammika, Tellambura, Chintha
core  

Adaptive redundant residue number system coded multicarrier modulation

, 2000
The novel class of nonbinary maximum minimum distance redundant residue number system (RRNS) codes is invoked in the context of adaptively RRNS coded, symbol-by-symbol adaptive multicarrier modulation, in order to combat the effects of frequency ...
Liew, T.H., Keller, T., Hanzo, L.
core   +1 more source

Minimum Bit Error Rate Multiuser Detection in Multiple Antenna Aided OFDM

, 2003
In this contribution, we propose a Minimum Bit Error Rate (MBER) multiuser detector for Space Division Multiple Access (SDMA) aided Orthogonal Frequency Division Multiplexing (OFDM) systems. It is shown that the MBER detector outperforms the Minimum Mean
Alias, M.Y., Hanzo, L., Samingan, A.K., Chen, S.   +3 more
core   +1 more source