Results 11 to 20 of about 517,702 (295)

A class of fractional-order hyperchaotic system and its application in spread spectrum communication

open access: yes工程科学学报, 2015
A class of fractional-order hyperchaotic system is introduced and its basic dynamical properties are investigated by means of theoretical analysis and numerical simulation.
ZHANG Xiao-dan, WANG Qi-li
doaj   +1 more source

Optimum Combining for Coherent FFH/DS Spread Spectrum Receivers in the Presence of Multi-Tone Jammer

open access: yesIEEE Access, 2020
Fast Frequency Hopping/Direct Sequence (FFH/DS) hybrid spread spectrum is an effective technique of the communication network for the robot swarms operating in complex electromagnetic environment.
Shixun Luo   +5 more
doaj   +1 more source

Integrated Waveform Design Based on UAV MIMO Joint Radar Communication

open access: yesInformation, 2023
The problem of orthogonal waveform construction in multiple input/multiple output (MIMO) radar communication integration greatly limits the realization of integration technology.
Hao Ma, Jun Wang, Xin Sun, Wenxin Jin
doaj   +1 more source

Tradeoff between compression ratio and decoding delay of distributed source coding for uplink transmissions in machine-type communication

open access: yesInternational Journal of Distributed Sensor Networks, 2018
Rapid growth of machine-type communications devices challenges the future network with a significant aggregated data traffic. Distributed source coding is a promising technique that compresses data sources and decreases required aggregated data ...
Wen Wang   +3 more
doaj   +1 more source

Deep Learning-Based Spread-Spectrum FGSM for Underwater Communication

open access: yesSensors, 2020
The limitation of the available channel bandwidth and availability of a sustainable energy source for battery feed sensor nodes are the main challenges in the underwater acoustic communication.
Zeyad A. H. Qasem   +4 more
doaj   +1 more source

A direct-sequence spread-spectrum communication system for integrated sensor microsystems [PDF]

open access: yes, 2005
Some of the most important challenges in health-care technologies have been identified to be development of noninvasive systems and miniaturization.
Arslan, T., Aydin, N., Cumming, D.R.S.
core   +1 more source

Implementation of Direct Sequence Spread Spectrum Communication System Using FPGA [PDF]

open access: yes, 2017
This paper presents the designed and implementation of spread spectrum technology for data transfer to overcome the interference problems associated with narrow band, very high frequency and ultra high frequency data transfer systems. The spread spectrum
Karthick, N. (N)   +3 more
core   +1 more source

Chaotic communications over radio channels [PDF]

open access: yes, 2001
The real issues of communicating over radio channels with continuous time chaotic signals are addressed. Synchronized and nonsynchronized methods are assessed.
Williams, C
core   +2 more sources

Deep Learning-Based Cyclic Shift Keying Spread Spectrum Underwater Acoustic Communication

open access: yesJournal of Marine Science and Engineering, 2021
A deep learning-based cyclic shift keying spread spectrum (CSK-SS) underwater acoustic (UWA) communication system is proposed for improving the performance of the conventional system in low signal-to-noise ratio and multipath effects.
Yufei Liu   +6 more
doaj   +1 more source

Horst Steible, unter Mitarbeit von Hermann Behrens, Die altsumerischen Bau- und Weihinschriften. Teil I: Inschriften aus ,Lagas'. Teil II: Kommentar zu den Inschriften aus ,Lagas'. Inschriften ausserhalb von ,Lagas'. Wiesbaden, Franz Steiner Verlag, 1982; Freiburger Altorientalische Studien, Band 5 [PDF]

open access: yes, 1984
This thesis investigates techniques for stealth hydroacoustic communication using spread spectrum. The Swedish naval defense organisations have a vision that all their units should be able to communicate with each other, even between underwater vehicles.
Andersson, Magnus, Severinson, Kristofer
core   +1 more source

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