Results 91 to 100 of about 2,794,451 (217)

Positioning in Chinese digital television network using TDS-OFDM signals

open access: yes, 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   +2 more sources

Modulated Lapped Transform-Based OFDM-IM With Low Complex Deep Neural Network Detector

open access: yesIEEE Open Journal of the Communications Society
This article presents a novel modulated lapped transform-based orthogonal frequency division multiplexing with index modulation (MLT-OFDM-IM) scheme combined with a low-complexity deep neural network (DNN) detector.
Ahmed Waheed, Smaya Moher
doaj   +1 more source

Evaluating the physical layer performance of an OFDM candidate for fourth generation networks [PDF]

open access: yes, 2002
In this paper, work performed under the framework of the IST SATURN project for wide area cellular OFDM is presented in the context of 4G networks.
Nix, AR   +3 more
core  

Iterative amplitude reconstruction of clipped OFDM signals with optimum equalisation

open access: yes, 2018
A technique called iterative amplitude reconstruction (IAR) is proposed for recovering the clipped orthogonal frequency-division multiplexing (OFDM) signals, where optimum equaliser tap coefficients are obtained under the MMSE criterion. The proposed IAR
Kwon, UK, Im, GH
core   +1 more source

Adaptive Modulation Techniques for Duplex OFDM Transmission

open access: yes, 2000
The design tradeoffs of turbo-coded burst-by-burst adaptive orthogonal frequency division multiplex (OFDM) wide-band transceivers are analyzed. We demonstrate that upon aiming for a higher throughput a higher proportion of low-quality OFDM subcarriers ...
Keller, T., Hanzo, L.
core   +1 more source

Decision Directed Channel Estimation Aided OFDM Employing Sample-Spaced and Fractionally-Spaced CIR Estimators

open access: yes, 2007
In this letter we characterize the substantial difference between two channel estimation approaches, namely the sample-spaced (SS) and the fractionally-spaced (FS) channel impulse response (CIR) estimators. The achievable performance of decision-directed
Akhtman, Jos, Hanzo, Lajos
core   +1 more source

Subblocks Set Design Aided Orthogonal Frequency Division Multiplexing With All Index Modulation

open access: yesIEEE Access, 2019
In recent years, OFDM with index modulation (OFDM-IM) has become a potential technique due to its improvement of diversity gain. In typical OFDM-IM schemes, incoming information bits are divided into two parts, symbols bits, and index bits.
Yuxin Shi   +4 more
doaj   +1 more source

An Enhanced Channel Estimation Scheme in OFDM-IM Systems With Index Pilots for IEEE 802.11p Standard

open access: yesIEEE Access
Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is emerging as a robust technology, especially valued in vehicular communication scenarios for its resilience.
Qing-Shang Dong   +3 more
doaj   +1 more source

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