Results 71 to 80 of about 49,895 (236)
OFDM Signal Research with Varied Subcarriers Number
Transport and Telecommunication, 2016 The orthogonal frequency division multiplexing (OFDM) aggregate signal energy characteristics are studied based on the OFDM signal simulation model. The information reliability of OFDM signal is explored for different sets of OFDM subcarrier numbers and ...
Uryvsky Leonid, Osypchuk Serhii
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
Positioning in Chinese digital television network using TDS-OFDM signals [PDF]
, 2011 Due to wide coverage and high transmission power of digital television (DTV) transmitters, DTV-based wireless positioning is a promising complementary to global positioning system.
Dai, Linglong +7 more
core +1 more source
IET Communications, Volume 20, Issue 1, January/December 2026.This work extends the Polyanskiy‐Poor‐Verdu (PPV) framework to lognormal wireless links. Specifically, the paper derives a closed‐form approximation for the average error probability under lognormal distribution, effectively generalizing the PPV analysis beyond the additive white Gaussian noise assumption.
Peng Du, Yuan Zhang
wiley +1 more source
Data-derived iterative channel estimation with channel tracking for a mobile fourth generation wide area OFDM system [PDF]
, 2003 In this paper an iterative channel estimation technique for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system is proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the
Nix, AR, Dowler, ASH, McGeehan, JP
core +1 more source
Transformer‐Enhanced Multi‐Satellite IRS Coordination for Next‐Generation LEO Communications
IET Communications, Volume 20, Issue 1, January/December 2026.This paper introduces a novel transformer‐enhanced framework for multi‐satellite intelligent refelecting surfaces (IRS) coordination that addresses these fundamental limitations through physics‐informed neural architectures incorporating orbital dynamics modelling, multi‐head self‐attention mechanisms for temporal dependency capture across rapidly ...
Ali Hussein Radhi +2 more
wiley +1 more source
Sample-Spaced and Fractionally-Spaced CIR Estimation Aided Decision Directed Channel Estimation for OFDM and MC-CDMA [PDF]
, 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
PERFORMANCE STUDY OF OFDM BASED ON IP-WT [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2008 In this paper, a proposed model based on In-Place Wavelet Transform (IP-WT) was suggested to improve the performance of the Orthogonal Frequency Division Multiplexing (OFDM) under the Additive White Gaussian Noise (AWGN), and flat fading channel.
Salih M. Salih
doaj +1 more source
Unified Downlink‐Uplink Waveform Optimization For MIMO‐OFDM Integrated Sensing and Communication
IET Communications, Volume 20, Issue 1, January/December 2026.This paper presents a unified waveform allocation framework for downlink and uplink MIMO‐OFDM integrated sensing and communication (ISAC) systems in 6G networks. We develop five optimization schemes, including optimal‐for‐communication, optimal‐for‐sensing, and MMSE‐based joint allocation, with closed‐form expressions for spectral efficiency, sensing ...
Gujjula Ramya +2 more
wiley +1 more source
Hierarchical Multi‐Stage Frequency Offset Estimation for THz Communications
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes a hierarchical multi‐stage frequency offset estimation framework for heterodyne terahertz communications. The receiver combines coarse spectral acquisition, confidence‐guided triggering, adaptive grid search and fine time‐domain correlation refinement to handle ultra‐large carrier frequency offsets under low‐signal‐to‐noise ratio ...
Haolin Zhang +4 more
wiley +1 more source