Results 1 to 10 of about 51,912 (158)

Long-Range Acoustic Communication Using Differential Chirp Spread Spectrum

open access: yesApplied Sciences, 2020
Here, we propose a new modulation method using chirp spread spectrum (CSS) modulation to indicate the result of long-range acoustic communication (LRAC).
Joohyoung Lee   +3 more
doaj   +3 more sources

Novel direct sequence spread spectrum communication method

open access: yesTongxin xuebao, 2023
In response to the problem of limited performance and low spectral efficiency in complex multipath environments of traditional direct sequence spread spectrum communication, a cyclic prefix (CP) block transmission structure spread spectrum system with a ...
Fanglin GU   +5 more
doaj   +2 more sources

Secure Spread Spectrum Communication Using Super-Orthogonal Optical Chaos Signals

open access: yesIEEE Photonics Journal, 2022
This paper proposes an analog spread spectrum secure communication system by designing a super-orthogonal two-dimensional electro-optic time delayed chaotic system.
Qing Chen   +3 more
doaj   +1 more source

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

Multilevel cyclic shift index differential chaos shift keying system for high data rate transmission

open access: yesIET Communications, 2023
This paper proposes a multilevel cyclic shift index modulation aided differential chaotic shift keying (MCSI‐DCSK) system to improve data rate and energy efficiency.
Zixian Lin, Weikai Xu, Lin Wang
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

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

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

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