Results 61 to 70 of about 23,872 (186)
Coherent Optical DFT-Spread OFDM
, 2011 We consider application of the discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-spread OFDM) technique to high-speed fiber optic communications.
Wang, Fanggang, Wang, Xiaodong
core +2 more sources
The FEBS Journal, Volume 292, Issue 21, Page 5659-5675, November 2025.Human tissue kallikrein 14 (KLK14), a skin protease, may mediate paracrine signaling in wound healing. KLK14 released by epithelial cells activates fibroblasts via PAR‐1 activation, inducing IL‐6, IL‐8, and CXCL1 expression. These cytokines in turn promote keratinocyte proliferation and migration, resulting in wound closure.
Laura Sasiadek +16 more
wiley +1 more source
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Volume 38, Issue 5, September/October 2025.ABSTRACT In this article, we provide a novel, expanded, and adapted pruning approach for the Simplified Volterra Series (SVS) model that makes it applicable to a wider range of Power Amplifiers (PAs). The proposed Modified SVS (MSVS) model is then applied in a Digital Predistortion (DPD) architecture to linearize a 25 W Gallium Nitride (GaN) RF PA.
Haithem Rezgui +3 more
wiley +1 more source
PAPR Reduction and Data Security Improvement for OFDM Technique Using Chaos System
Journal of Communications Software and Systems, 2019 Orthogonal Frequency Division Multiplexing (OFDM) is the most popular multicarrier technique because it produces several advantages such as higher spectral efficiency, high transmission rate, robustness to fading channel and etc..
Muntadher Kadhim Abdullah +1 more
doaj
Symbol interferometry and companding transform for PAPR reduction of OTFS signal
ETRI JournalThis paper presents methods for reducing the peak-to-average power ratio (PAPR) of the orthogonal time frequency space (OTFS) signal. These methods mainly consist of two operations: symbol interferometry (SI) and either μ-law or A-law companding.
Aare Gopal +2 more
doaj +1 more source
Beam Domain MIMO-OFDM Optical Wireless Communications With PAPR Reduction
IEEE Photonics Journal, 2023 Multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM), confirmed as an efficient technique, has been applied in optical wireless communications (OWCs) to improve the transmission rate.
Chen Sun +5 more
doaj +1 more source
Analysis of Alternative Metrics for the PAPR Problem in OFDM Transmission
, 2011 The effective PAPR of the transmit signal is the standard metric to capture the effect of nonlinear distortion in OFDM transmission. A common rule of thumb is the log$(N)$ barrier where $N$ is the number of subcarriers which has been theoretically ...
Wunder, Gerhard
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Journal of Advanced Nursing, Volume 81, Issue 9, Page 6011-6021, September 2025.ABSTRACT Aim The aim of this qualitative exploratory study aimed was to explore how nurses experienced and responded to the COVID‐19 pandemic crisis in clinical settings to develop a response model. Design Focus group interviews. Methods Thirteen focus group interviews (n = 50) with nurses and nurse leaders practicing in diverse clinical settings were ...
Dahae Rim +7 more
wiley +1 more source
Performance Analysis of MIMO Links With Non‐Isolated Active Antenna Arrays
Microwave and Optical Technology Letters, Volume 67, Issue 8, August 2025.ABSTRACT In this paper, we analyze the performance of non‐isolated active arrays in a multiple‐input multiple‐output (MIMO) system. When ferromagnetic‐type isolators are removed in the transmitter (Tx) chains, the antenna mutual coupling will dynamically change the load impedance seen by the power amplifiers (PAs) at their outputs, which subsequently ...
Jiayu Hou +3 more
wiley +1 more source
Universal Filtered Multi-Carrier System Based on Selective Mapping
Xibei Gongye Daxue Xuebao, 2019 Internet of things (IoT) and machine-to-machine (M2M) communication are characterized by short periods and bursts. Traditional orthogonal frequency division multiplexing (OFDM) has not meet the demand for such traffic, while IoT and M2M communication ...
doaj +1 more source