Results 111 to 120 of about 2,794,451 (217)

An RIS-Assisted Integrated Deep Learning Framework for MIMO-OFDM-IM

IEEE Access
Multiple-input multiple-output orthogonal frequency division multiplexing with index modulation (MIMO-OFDM-IM) offers a flexible trade-off between error performance and spectral efficiency.
Md Abdul Aziz, Md Habibur Rahman, Mohammad Abrar Shakil Sejan, Rana Tabassum, Hyoung-Kyu Song   +4 more
doaj   +1 more source

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  

Optimization of the Number of Active Subcarriers and M-PAM Modulation Constellation Pattern for OFDM-IM Systems

مهندسی مخابرات جنوب
Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) is a system that exhibits superior power efficiency and bandwidth compared to the conventional OFDM system.
Farshad Jalili kharajoo, SeyyedHadi SeyyedMasoumian Charandabi   +1 more
doaj  

Generic MMSE Decision Directed Channel Estimation for OFDM and MC-CDMA

, 2004
In this letter we propose a Minimum Mean Square Error (MMSE) Channel Impulse Response (CIR) estimator-aided Decision Directed Channel Estimation (DDCE) method, which is suitable for employment in both OFDM and MC-CDMA systems.
Akhtman, Jos, Hanzo, Lajos
core  

Sample-Spaced and Fractionally-Spaced CIR Estimation Aided Decision Directed Channel Estimation for OFDM and MC-CDMA

, 2005
The achievable performance of decision-directed channel estimation (DDCE) is analysed in the context of both OFDM and MC CDMA systems. Two different estimation methods suitable for both OFDM and MC-CDMA systems are considered, which employ sample-spaced (
Akhtman, J., Hanzo, L.
core   +1 more source

MMSE Channel Prediction Assisted Symbol-by-Symbol Adaptive OFDM

, 2002
Subband Adaptive Orthogonal Frequency Division Multiplexing (OFDM) constitutes an effective method of compensating for the frequency selective fading incurred by mobile receivers.
Münster, M., Hanzo, L.
core  

Generic Reduced-Complexity MMSE Channel Estimation for OFDM and MC-CDMA

, 2005
The performance of a decision-directed channel estimation scheme is analyzed in the context of both OFDM and MC-CDMA systems. A difficulty associated with the employment of the Least Squares (LS) approach to the problem of a posteriori channel estimation
Akhtman, J., Hanzo, L.
core  

OFDM synchronizer implementation for an IEEE 802.11(a) compliant modem

, 2002
In OFDM transmissions, synchronization arises to be one of the most critical operations. The reason for that is the preservation of orthogonality: timing offsets and frequency offsets destroy easily this orthogonality, leading to Inter-Symbol ...
Troya, Alfonso, Kraemer, Rolf, Maharatna, Koushik, Krstic, Milos, Grass, Eckhard   +4 more
core   +1 more source

Transformer-Based Detection for Highly Mobile Coded OFDM Systems. [PDF]

Entropy (Basel), 2023
Wang L, Zhou W, Tong Z, Zeng X, Zhan J, Li J, Chen R.   +6 more
europepmc   +1 more source

A novel technique for automatic hybrid modulation classification in UWA communications using 3D constellation diagrams. [PDF]

Sci Rep
Abdel-Moneim MA, Ramadan KF, El-Rabaie EM, El-Samie FEA, Abdel-Salam N.   +4 more
europepmc   +1 more source