Results 121 to 130 of about 4,863,781 (309)

Robust Blind Frequency and Transition Time Estimation for Frequency Hopping Systems

EURASIP Journal on Advances in Signal Processing, 2010
In frequency hopping spread spectrum (FHSS) systems, two major problems are timing synchronization and frequency estimation. A blind estimation scheme is presented for estimating frequency and transition time without using reference signals.
Fu Kuo-Ching, Chen Yung-Fang
doaj  

Sistemas modulares de comunicación basados en técnicas de modulación de espectro ensanchado utilizando GNU radio

Revista Ingenierías Universidad de Medellín
Esta investigación se centra en el desarrollo de sistemas modulares en el software GNU Radio como herramienta de apoyo didáctica para la experimentación en el área de telecomunicaciones.
Maria Camila Herrera Ramos, Luis Miguel Capacho Valbuena, Auramaria Londoño Cano   +2 more
doaj   +1 more source

Joint Source Coding, Unity Rate Precoding and FFH-MFSK Modulation using Iteratively Decoded Irregular Variable Length Coding

, 2007
Serially concatenated and iteratively decoded Irregular Variable Length Coding (IrVLC) combined with precoded Fast Frequency Hopping (FFH) M-ary Frequency Shift Keying (MFSK) is considered.
Ahmed, S., Lie-Liang Yang, Robert G. Maunder, Soon Xin Ng, Ng, S. X., Yang, L-L., Hanzo, L., Lajos Hanzo, Maunder, R. G., Sohail Ahmed   +9 more
core   +1 more source

Electrolyte Additive Strategies in Aqueous Zn‐Ion Batteries: Recent Advances and Prospects

Advanced Science, EarlyView.
This article provides a comprehensive overview of the current status and future development directions of AZIBs electrolyte additives in three aspects: stabilizing zinc anodes (uniform deposition, inhibition of dendritic crystals), protecting cathodes (structural stability, inhibition of dissolution), and enhancing electrolyte stability (wider ...
Yuanze Yu, Hongmin Liu, Long Fan, Huakun Liu, Shixue Dou, Guoxiu Wang, Nana Wang, Zhongchao Bai   +7 more
wiley   +1 more source

The Probability of Multiple Correct Packet Reception in Coded Synchronous Frequency-Hopped Spread-Spectrum Networks

, 1999
In this paper we present a computationally efficient method of evaluating the probability of multiple correct packet reception in coded synchronous frequency-hopped spread-spectrum (FHSS) networks.
Lim, D., Hanzo, L.
core   +1 more source

SYNCHRONIZATION OF FREQUENCY-HOPPING SCHEDULING IN A FREQUENCY-HOPPING SPREAD SPECTRUM (FHSS) SYSTEM [PDF]

, 2019
Presented herein are device synchronization techniques in a frequency-hopping spread spectrum (FHSS) system without time synchronization when a neighbor\u27s channel hopping table is known.
Zhao, Li, Wei, Ling, Wu, Wenjia, Li, Chuanwei   +3 more
core   +1 more source

An Efficient Biological Codon Recognition Reservoir Computing System Based on Low‐Energy Epitaxial Hf0.52Zr0.48O2 Ferroelectric Memristors

Advanced Science, EarlyView.
This work reports on epitaxially grown Hf0.52Zr0.48O2 ferroelectric memristors with high stability (high durability exceeding 108 cycles and a retention time exceeding 104 s for 16 states) and ultra‐low operating energy consumption (∼121 fJ). A memristor array‐based reservoir computing system is constructed and applied for the first time in the field ...
Ying Liu, Jikang Xu, Yongqing Jia, Wenxuan Wang, Weifeng Zhang, Biao Yang, Xiaobing Yan   +6 more
wiley   +1 more source

Structural and Compositional Effects on the Scintillation Properties of Fast Emitting Metal‐Organic Frameworks

Advanced Science, EarlyView.
The crystalline structure, the atomic numbers of the constituent elementsand the size of MOF crystals each influence their photoluminescence and scintillation properties in distinct ways. Together, these factors provide valuable guidelines for designing systems with optimized performance and tunable timing characteristics, arising from the synergistic ...
Francesca Cova, Jacopo Perego, Biplab Joarder, Nobuhiro Yanai, Anna Vedda, Silvia Bracco, Angiolina Comotti, Angelo Monguzzi, Irene Villa   +8 more
wiley   +1 more source

Multi-modem-based FHSS-drone takeover with precision spoofing

ETRI Journal
Traditional radio frequency (RF)-based anti-drone technologies focus on jam-ming the command and control (C2) RF signal or global navigation satellite system (GNSS) signal of a target drone.
Jae Gu Kang, Byeong Cheol Choi
doaj   +1 more source

Multiferroic‐Centric Materials and Systems Engineering for Battery Applications: An Insight Into Mechanisms, Strategies, and Characterizations

Advanced Science, EarlyView.
Multiferroic order parameters – polarization, magnetization, and ferroelastic strain – are positioned as dynamic design variables for batteries. Their mechanistic roles, practical tuning through fabrication and external fields, and ferroic‐resolved characterization routes are unified into a closed‐loop framework, revealing how coupled ferroic responses
Jiaqi Su, Yanda Zhu, Hao Peng, Manman Li, Xuzihan Zhang, Meixiao Wu, Siyuan Zhang, Yuhan Zeng, Jiwen Liao, Ming Luo, Hetaishan Huang, Yutong Wang, Sean Li, Wenxian Li   +13 more
wiley   +1 more source