Results 51 to 60 of about 68,492,323 (167)
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 With Generalized Joint Index Modulation
IEEE Open Journal of the Communications SocietyOrthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising multi-carrier technique for next generation wireless communication networks.
Zeng Hu +7 more
doaj +1 more source
Protection scheme of subcarrier index in OFDM with index modulation aided by LDPC coding
Xibei Gongye Daxue Xuebao, 2021 The receiver of OFDM with Index Modulation (OFDM-IM) usually adopts a Log Likelihood Ratio (LLR) detection algorithm based on the activation state of subcarriers.
doaj +1 more source
TranQuiL: Long Range Detection and Localization of Interference in Radio Quiet Zones
Radio Science, Volume 61, Issue 1, January 2026.Abstract Radio Quiet Zones (RQZs) have been established to prevent radio sources from causing harmful interference to sensitive radio telescopes, which study extremely faint cosmic radio waves. Even with strict regulations, such interference is growing due to the widespread use of consumer electronics, emitting in many different frequency bands ...
Atul Bansal +5 more
wiley +1 more source
, 2007 Orthogonal Frequency Division Multiplexing (OFDM) has been employed in numerous wireless standards. However, the performance of OFDM systems is degraded by both the Carrier Frequency Offset (CFO) and the Phase Estimation Error (PER).
Liu, X., Hanzo, L.
core +2 more sources
A Supervised Learning Method for High‐Performance Channel State Information Estimation
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes a deep neural network (DNN)‐based method for channel state information (CSI) estimation, incorporating a Discrete Fourier Transform (DFT) step to reduce noise impact and improve learning accuracy. Simulation results demonstrate that the proposed method achieves superior channel estimation performance, particularly in noisy wireless ...
Tianle Han, Yongwei Zhang, Murat Temiz
wiley +1 more source
An Efficient Index Mapping Algorithm for OFDM-Index Modulation
IEEE Access, 2019 An index mapping algorithm that efficiently associates the subcarrier activation pattern (SAP) or constellation mode pattern (CMP) sequences with the index selecting bit (ISB) sequences is proposed to improve the error performances of two OFDM-`index ...
Eunchul Yoon +3 more
doaj +1 more source
Acceleration‐Aware Estimation and Compensation of Doppler Scale for Mobile UWA OFDM Systems
IET Communications, Volume 20, Issue 1, January/December 2026.We propose a novel method to estimate and compensate for the Doppler scale caused by acceleration in orthogonal frequency division multiplexing (OFDM)‐based underwater acoustic (UWA) systems. Simulation results under additive white Gaussian noise (AWGN), synthetic multipath and realistic waymark channel conditions demonstrate that the proposed approach
Yong‐Ho Cho, Seung‐Geun Kim
wiley +1 more source
IEEE Access, 2017 Dual-mode index modulation aided orthogonal frequency division multiplexing (DM-OFDM) is recently proposed, which modulates all subcarriers to eliminate the limits of spectrum efficiency (SE) in OFDM with index modulation (OFDM-IM).
Xuekun Zhang +4 more
doaj +1 more source
IET Communications, Volume 20, Issue 1, January/December 2026.A hybrid framework of deep learning‐based channel estimation for robust communication in free space optical (FSO)‐based low earth orbit (LEO) satellite system using advanced modulation formats for orthogonal frequency division multiplexing (OFDM) transmission. Simulations demonstrate that STA‐ SRCNN and STA‐DNCNN excel in terrestrial FSO channels (NMSE
Saad Rustum +4 more
wiley +1 more source