Results 11 to 20 of about 223,203 (262)

Ground-based, Hyperbolic Radiolocation System with Spread Spectrum Signal - AEGIR [PDF]

TransNav, 2011
At present the most popular radiolocation system in the world is Global Positioning System (GPS).As it is managed by the Department of Defence of the U.S.A., there is always the risk of the occasional inaccuracies or deliberate insertion of errors ...
Slawomir Jerzy Ambroziak, Ryszard Katulski, Jaroslaw Sadowski, Wojciech Siwicki, Jacek Stefanski   +4 more
doaj  

Modeling research of group delay ripple on the performance analysis oriented to a satellite direct sequence spread spectrum communication system

Xibei Gongye Daxue Xuebao
This study introduces the group delay and its characteristics in satellite channel, meanwhile, the model of the impact of group delay ripple on performance of direct sequence spread spectrum communication system is established and simulated for analysis.
LI Xiongfei, ZHAI Jiqiang, SUN Xuemin, GUO Yangming, ZHOU Guochang   +4 more
doaj   +1 more source

An Adaptive Multi-Mode Underwater Acoustic Communication System Using OSDM and Direct Sequence Spread Spectrum Modulation

IEEE Access, 2021
Dynamic underwater acoustic network is a research hotspot. Due to the complexity and time-varying of underwater acoustic channel, the performance of single-mode underwater acoustic communication system is often limited by the worst channel situation ...
Lanjun Liu, Hui Ren, Hao Zhao, Jiong Niu, Jialin Chen, Junfeng Wang   +5 more
doaj   +1 more source

Direct-sequence spread spectrum system [PDF]

Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991, 2002
The authors discuss the construction and evaluation of the performance of a direct-sequence spread spectrum (DSSS) system. The system uses a special type of injection-locked oscillator called a synchronous oscillator for code synchronization. The DSSS system was constructed in a manner that provides a test-bed for demonstrating SS principles and allows
Stephens, J. P., Norman, D. M.
openaire   +2 more sources

Therapeutic Apheresis for Intravenous Methylprednisolone‐Refractory Neuromyelitis Optica Spectrum Disorder: Clinical and Radiological Outcomes in a Single‐Center Case Series

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing autoimmune disease of the central nervous system. High‐dose intravenous methylprednisolone (IVMP) is the standard first‐line therapy for acute attacks, although some patients remain refractory.
Wataru Horiguchi, Daisuke Katagiri, Takeyuki Watadani, Shunichi Matsuda, Hiroshi Kaneko, Noritoshi Arai   +5 more
wiley   +1 more source

A Bibliometric Analysis of Publications in Uremic Toxins From 1991 to 2024

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Uremic toxins are a growing area of research in nephrology, with significant implications in the progression and treatment of chronic kidney disease (CKD) and the management of end‐stage kidney disease (ESKD). This bibliometric analysis aims to evaluate the global research trends, key contributors, and the impact of publications in ...
Yuh‐Shan Ho, Karim M. Soliman, Wisit Cheungpasitporn, Wannasit Wathanavasin, Ahmed Daoud, Ahmed I. Kamal, Balázs Szamosfalvi, Tibor Fülöp   +7 more
wiley   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Rancang Bangun FM Transmitter Menggunakan Metode Spread Spectrum Signal Berbasis Raspberry Pi

Jurnal Jaringan Telekomunikasi, 2021
Kebutuhan akan sistem Komunikasi yang dapat mengatasi masalah interferensi, dapat menjamin kerahasiaan informasi yang dikirim dan dapat beroperasi pada tingkat S/N  (Signal to Noise Ratio)  yang rendah atau tahan terhadap pada derau yang besar.Salah ...
Achmad Hanif, Aad Hariyadi, Aisah Aisah
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source

A Chaos-Based Secure Direct-Sequence/Spread-Spectrum Communication System

Abstract and Applied Analysis, 2013
This paper proposes a chaos-based secure direct-sequence/spread-spectrum (DS/SS) communication system which is based on a novel combination of the conventional DS/SS and chaos techniques.
Nguyen Xuan Quyen, Vu Van Yem, Thang Manh Hoang   +2 more
doaj   +1 more source