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Gaussian-Distributed Spread-Spectrum for Covert Communications [PDF]

open access: yesSensors, 2023
Covert communication techniques play a crucial role in military and commercial applications to maintain the privacy and security of wireless transmissions from prying eyes.
Ismail Shakeel   +3 more
doaj   +2 more sources

Spread Spectrum Image Watermarking Through Latent Diffusion Model [PDF]

open access: yesEntropy
The rapid development of diffusion models in image generation and processing has led to significant security concerns. Diffusion models are capable of producing highly realistic images that are indistinguishable from real ones.
Hongfei Wu, Xiaodan Lin, Gewei Tan
doaj   +2 more sources

Secured Watermarking Image Using Spread Spectrum

open access: yesTikrit Journal of Engineering Sciences, 2016
Due to the increased development in technique of data transfer over internet and transmission media, the access and copy to these data in unathentical manner became a big challenge in the transmission media.
Abdulkareem M. Salih
doaj   +3 more sources

A Random Modulation Spread-Spectrum Digital PWM for a Low System Clock Digital Buck Converter

open access: yesIEEE Access, 2021
The need for a high-efficiency power system has emerged since many IoT devices are mainly operated by batteries. A power system with analog control can have a high control bandwidth, but it is relatively vulnerable to noise disturbances and may suffer ...
Chan-Ho Moon   +2 more
doaj   +1 more source

Spread Spectrum Magnetic Resonance Imaging [PDF]

open access: yesIEEE Transactions on Medical Imaging, 2012
We propose a novel compressed sensing technique to accelerate the magnetic resonance imaging (MRI) acquisition process. The method, coined spread spectrum MRI or simply s2MRI, consists of pre-modulating the signal of interest by a linear chirp before random k-space under-sampling, and then reconstructing the signal with non-linear algorithms that ...
Puy, Gilles   +6 more
openaire   +4 more sources

Compressive Sensing for Spread Spectrum Receivers [PDF]

open access: yes, 2013
With the advent of ubiquitous computing there are two design parameters of wireless communication devices that become very important power: efficiency and production cost.
Fyhn, Karsten   +3 more
core   +2 more sources

Analysis and comparison of code index modulation and multi-ary spread spectrum

open access: yesDianzi Jishu Yingyong, 2018
In the current anti-jamming communication, the spread spectrum communication has been studied deeply with the advantages of strong anti-jamming ability and good security performance.
Feng Sheng   +4 more
doaj   +1 more source

Wireless Battery Chargers Operating at Multiple Switching Frequencies with Improved Performance

open access: yesEnergies, 2023
The operation of wireless battery chargers at multiple switching frequencies may lead to a noticeable suppression of conducted and radiated electromagnetic interference (EMI) at the cost of decreased efficiency (mainly at lower load resistances) and ...
Deniss Stepins   +3 more
doaj   +1 more source

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

Code Synchronization Algorithm Based on Segment Correlation in Spread Spectrum Communication

open access: yesAlgorithms, 2015
Spread Spectrum (SPSP) Communication is the theoretical basis of Direct Sequence Spread Spectrum (DSSS) transceiver technology. Spreading code, modulation, demodulation, carrier synchronization and code synchronization in SPSP communications are the core
Aohan Li   +4 more
doaj   +1 more source

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