Results 51 to 60 of about 14,564 (231)
IEEE Photonics Journal, 2022 We put forward and provide the first illustration of a high capacity and high spectral efficient free space optical communication (FSOC) system using digital domain power division multiplexing orthogonal-frequency-division-multiplexed (DDPD-O-OFDM ...
Wahyu Hendra Gunawan +6 more
doaj +1 more source
A robust timing and frequency offset estimation scheme for orthogonal frequency division multiplexing (OFDM) systems [PDF]
1999 IEEE 49th Vehicular Technology Conference (Cat. No.99CH36363), 2003 This paper presents a novel, robust technique to estimate timing and frequency offset in an orthogonal frequency division multiplexing (OFDM) system without the use of pilot signals. We first present an overview of an OFDM system for high-speed wireless data communications, including the particular parameters chosen for our design.
B. McNair, L.J. Cimini, N. Sollenberger
openaire +1 more source
Electronics Letters, Volume 62, Issue 1, January/December 2026.1.This paper develops an analytical model to calculate the signal‐to‐interference ratio performance of mobile orthogonal frequency division multiplexing underwater acoustic (UWA) communication systems. 2.The model accounts for UWA channel distortion and non‐uniform Doppler effects, maintaining high accuracy across a range of Doppler shift magnitudes. 3.
Xinyu Liu +4 more
wiley +1 more source
Experimental Study on Shortwave Communication and OTHR Integrated System Based on OFDM Waveform
Leida xuebao, 2012 Based on the recently developed active-passive multifunctional all-digital HF surface wave radar hardware platform of Wuhan University, an experiment study of integrated technology for shortwave communication and Over-The-Horizon Radar (OTHR) application
Shao Qi-hong +4 more
doaj +1 more source
Ambiguity Function Optimization Based on Joint Communication and Sensing Waveform
Electronics Letters, Volume 62, Issue 1, January/December 2026.The sidelobe suppression strategy proposed in this study demonstrates significant advantages. Its ability to effectively reduce ambiguity function sidelobes has important practical significance for engineering. ABSTRACT The ambiguity function (AF) plays a critical role in joint communication and sensing (JCAS) systems. In this letter, we design a novel
Zheming Guo, Baixiao Chen
wiley +1 more source
Analysis and Design of Channel Estimation in Multicell Multiuser MIMO OFDM Systems [PDF]
, 2014 This paper investigates the uplink transmission in multicell multiuser multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. The system model considers imperfect channel estimation, pilot contamination (PC), and
Xu, Peng +3 more
core +1 more source
OFDM SIGNAL ENERGY CHARACTERISTICS RESEARCH IN CHANNEL WITH PERMANENT PARAMETERS
Information and Telecommunication Sciences, 2013 The simulation model for OFDM (Orthogonal Frequency Division Multiplexing) signal energy characteristics research is developed. The OFDM signal vector-phase states are examined. The momentary amplitudes distribution function is obtained.
Leonid Uryvskyi, Serhii Osypchuk
doaj +1 more source
IEEE Transactions on Wireless Communications, 2022 The optical wireless communication (OWC) with the intensity modulation (IM), requires the modulated radio frequency (RF) signal to be real and non-negative. To satisfy the requirements, this paper proposes two types of mixed orthogonal frequency division multiplexing (X-OFDM) waveform.
Xu Li 0001 +5 more
openaire +2 more sources
Electronics Letters, Volume 62, Issue 1, January/December 2026.We propose a Doppler‐tolerant DFT‐spread orthogonal time‐coded OFDM (DSS‐OTC‐OFDM) waveform for MIMO radar that maintains orthogonality under Doppler shifts while enabling flexible code design. An optimisation framework is developed to minimise peak sidelobe level (PSL) and suppress cross‐correlation after matched filtering across a range of Doppler ...
Ata Nokhostin Roohi +2 more
wiley +1 more source
Adapting DVB-SH system parameters to mobile environments [PDF]
, 2011 A performance analysis of the digital video broadcasting - satellite to handheld (DVB-SH) system in presence of ground mobile terminals (GMTs) is presented. The paper focuses on the Doppler spread issue.
Escrig, Benoît +2 more
core