Results 141 to 150 of about 4,021,406 (264)

An iteration technique for recovering insufficient cyclic prefix and clipped OFDM signals

open access: yes, 2019
Two of the major drawbacks of orthogonal frequency-division multiplexing (OFDM) are its large peak-to-average power ratio (PAPR) and long cyclic prefix (CP), which decrease the system power and spectral efficiencies, respectively.
Kim, ES, Kwon, UK, Im, GH
core   +1 more source

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

open access: yesمهندسی 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   +1 more
doaj  

Orthogonal frequency division multiplexing (OFDM) in photonic communications

open access: yes
OFDM has emerged as a promising modulation technique in long-haul and access optical networks because of a number of advantages: Scalable spectrum partitioning, good spectral efficiency, dispersion tolerance, and a natural suitability for software ...
Vallaitis, T.   +20 more
core  

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

open access: yes, 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  

Iterative Joint Channel Estimation and Symbol Detection for Multi-User MIMO OFDM

open access: yes, 2006
Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems have recently attracted substantial research interest. However, compared to Single-Input-Single-Output (SISO) systems, channel estimation in the MIMO scenario
Jiang, M.   +3 more
core  

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

open access: yesEntropy (Basel), 2023
Wang L   +6 more
europepmc   +1 more source

Hamming Distance Optimized Underwater Acoustic OTFS-IM Systems. [PDF]

open access: yesEntropy (Basel), 2023
Guo X, Wang B, Zhu Y, Fang Z, Han Z.
europepmc   +1 more source

Iterative Joint Channel Estimation and Multi-User Detection for Multiple-Antenna Aided OFDM Systems

open access: yes, 2007
Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems have recently attracted substantial research interest. However, compared to Single-Input-Single-Output (SISO) systems, channel estimation in the MIMO scenario
Akhtman, J, Jiang, M, Hanzo, L.
core  

Deep Learning-Based Next-Generation Waveform for Multiuser VLC Systems. [PDF]

open access: yesSensors (Basel), 2022
Asif HM   +3 more
europepmc   +1 more source

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