Results 81 to 90 of about 2,231 (222)

Single-carrier frequency-domain equalization with hybrid decision feedback equalizer for Hammerstein channels containing nonlinear transmit amplifier [PDF]

open access: yes, 2017
We propose a nonlinear hybrid decision feedback equalizer (NHDFE) for single-carrier (SC) block transmission systems with nonlinear transmit high power amplifier (HPA), which significantly outperforms our previous nonlinear SC frequency-domain ...
Alotaibi, Naif D.   +5 more
core   +1 more source

Clinical Research Network: JHCRN Infrastructure and Lessons Learned

open access: yesClinical and Translational Science, Volume 18, Issue 1, January 2025.
ABSTRACT Clinical research studies are becoming increasingly complex resulting in compounded work burden and longer study cycle times, each fueling runaway costs. The impact of protocol complexity often results in inadequate recruitment and insufficient sample sizes, which challenges validity and generalizability.
Rahul Kashyap   +13 more
wiley   +1 more source

A Detailed Study of ABC‐Type Fractal–Fractional Dynamical Model of HIV/AIDS

open access: yesComputational and Mathematical Methods, Volume 2025, Issue 1, 2025.
This paper is aimed at studying the dynamics of community transmission of HIV by constructing a fractal fractional mathematical model whose kernel is a generalized Mittag–Leffler type. First, we collect and analyze statistical data for epidemiological surveillance of HIV/AIDS prevalence in Yemen from 2000 to 2022.
Mansour A. Abdulwasaa   +6 more
wiley   +1 more source

Non-Binary Coded CCSK and Frequency-Domain Equalization with Simplified LLR Generation

open access: yes, 2013
International audienceIn this paper, we investigate the performance of Single-Carrier (SC) transmission with Non-Binary Low- Density Parity-Check (NB-LDPC) coded Cyclic Code-Shift Keying (CCSK) signaling in a multipath environment and we show that the ...
Abassi, Oussama   +3 more
core   +2 more sources

Implementation of preamble based GFDM prototype for robust 5G systems

open access: yesIET Communications, Volume 18, Issue 19, Page 1348-1357, December 2024.
The block diagram for implementing GFDM pertaining to CFO estimation and depicting the trade off between length of the training symbol and bit error rate. Abstract Generalized frequency division multiplexing (GFDM) is a flexible block‐structured multi‐carrier scheme recently proposed for next‐generation wireless communication systems. There are various
Yaswanth K.N.G.B   +5 more
wiley   +1 more source

Receiver Design to Employ Simultaneous Wireless Information and Power Transmission with Joint CFO and Channel Estimation

open access: yesIEEE Access, 2019
Radio-frequency energy harvesting (EH) is one of the enabling technologies for the next-generation wireless communication systems. EH techniques are specifically used to improve the energy efficiency of the system.
Akashkumar Rajaram   +3 more
doaj   +1 more source

Hypomethylation at PANDAR promoter progressively induces senescence in adipocyte precursor cells in subjects with obesity and type 2 diabetes

open access: yesThe FASEB Journal, Volume 38, Issue 19, 15 October 2024.
APCs from individuals with obesity show a progressive increase in senescence markers, which worsens with T2D. In APCs from individuals with obesity and T2D, PANDAR is up‐regulated. This results from the hypo‐methylation of the −1317 CpG at the PANDAR promoter.
Antonella Desiderio   +11 more
wiley   +1 more source

Re‐evaluation of silicon dioxide (E 551) as a food additive in foods for infants below 16 weeks of age and follow‐up of its re‐evaluation as a food additive for uses in foods for all population groups

open access: yesEFSA Journal, Volume 22, Issue 10, October 2024.
Abstract The present opinion is the follow‐up of the conclusions and recommendations of the Scientific Opinion on the re‐evaluation of silicon dioxide (E 551) as a food additive relevant to the safety assessment for all age groups. In addition, the risk assessment of silicon dioxide (E 551) for its use in food for infants below 16 weeks of age is ...
EFSA Panel on Food Additives and Flavourings (FAF)   +53 more
wiley   +1 more source

Matrix‐less methods for the spectral approximation of large non‐Hermitian Toeplitz matrices: A concise theoretical analysis and a numerical study

open access: yesNumerical Linear Algebra with Applications, Volume 31, Issue 4, August 2024.
Abstract It is known that the generating function of a sequence of Toeplitz matrices may not describe the asymptotic distribution of the eigenvalues of the considered matrix sequence in the non‐Hermitian setting. In a recent work, under the assumption that the eigenvalues are real, admitting an asymptotic expansion whose first term is the distribution ...
Manuel Bogoya   +3 more
wiley   +1 more source

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