CHAOTIC COMMUNICATION SYSTEM USING CHUA'S OSCILLATORS REALIZED WITH CCII+s

2009 ◽  
Vol 19 (12) ◽  
pp. 4217-4226 ◽  
Author(s):  
R. TREJO-GUERRA ◽  
E. TLELO-CUAUTLE ◽  
C. CRUZ-HERNÁNDEZ ◽  
C. SÁNCHEZ–LÓPEZ
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Second Generation ◽  
Current Conveyor ◽  
Experimental Measurements ◽  
Chaotic Communication ◽  
Positive Type ◽  
Experimental Implementation ◽  
Communication Scheme ◽  
Hamiltonian Forms

This work shows the experimental implementation of a chaotic communication system based on two Chua's oscillators which are synchronized by Hamiltonian forms and observer approach. The chaotic communication scheme is realized by using the commercially available positive-type second generation current conveyor (CCII+), which is included into the AD844 device. As a result, experimental measurements are provided to demonstrate the suitability of the CCII+ to implement chaotic communication systems.

Decoding Digital Information from the Cascaded Heterogeneous Chaotic Systems

2003 ◽  
Vol 13 (06) ◽  
pp. 1599-1608 ◽  
Author(s):  
Chao Tao ◽  
Gonghuan Du ◽  
Yu Zhang
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Chaotic Systems ◽  
Digital Information ◽  
Chaotic Communication ◽  
New Approach ◽  
Communication Scheme ◽  
Simulation Results

In this paper, we propose a new approach to breaking down chaotic communication scheme by attacking its encryption keys. A remarkable advancement is that it can decode the hidden message exactly. This makes it become possible to break down some cascaded chaotic communication systems. We also decode digital information from the cascaded heterogeneous chaotic communication system and give the simulation results.

SPREAD SPECTRUM COMMUNICATIONS BASED ON CHAOTIC SYSTEMS

1996 ◽  
Vol 06 (12a) ◽  
pp. 2361-2374 ◽  
Author(s):  
J. M. LIPTON ◽  
K. P. DABKE
Keyword(s):  
Spread Spectrum ◽  
Communication System ◽  
Continuous Time ◽  
Communication Systems ◽  
Chaotic Systems ◽  
Spread Spectrum Communication ◽  
Chaotic Communication ◽  
Experimental Implementation ◽  
Spread Spectrum Communications ◽  
Chaotic Carrier

Spread spectrum communication systems based on chaotic carrier sequences are examined for their security and robustness in the presence of noise and other interferences. Both discrete and continuous time chaotic carriers are examined and methods for determining the effectiveness of such carriers are discussed. An experimental implementation of a chaotic communication system was built and tested, and then compared with theory and the results from simulations.

CMOS inverters based positive type second generation current conveyor

2006 ◽  
Vol 50 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Hervé Barthélemy ◽  
Matthieu Fillaud ◽  
Sylvain Bourdel ◽  
Jean Gaubert
Keyword(s):  
Second Generation ◽  
Current Conveyor ◽  
Positive Type

scholarly journals Chaotic Secure Communication Systems with an Adaptive State Observer

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Wei-Der Chang ◽  
Shun-Peng Shih ◽  
Chih-Yung Chen
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
Communication Systems ◽  
State Observer ◽  
The Public ◽  
Signal Demodulation ◽  
Communication Scheme ◽  
Adaptive State Observer ◽  
Public Channel ◽  
System States

This paper develops a new digital communication scheme based on using a unified chaotic system and an adaptive state observer. The proposed communication system basically consists of five important elements: signal modulation, chaotic encryption, adaptive state observer, chaotic decryption, and signal demodulation. A sequence of digital signals will be delivered from the transmitter to the receiver through a public channel. It is rather reasonable that if the number of signals delivered on the public channel is fewer, then the security of such communication system is more guaranteed. Therefore, in order to achieve this purpose, a state observer will be designed and its function is to estimate full system states only by using the system output signals. In this way, the signals delivered on the public channel can be reduced mostly. According to these estimated state signals, the original digital sequences are then retrieved completely. Finally, experiment results are provided to verify the applicability of the proposed communication system.

H∞-SYNCHRONIZER FOR CHAOTIC COMMUNICATION SYSTEMS

2008 ◽  
Vol 18 (04) ◽  
pp. 1175-1187 ◽  
Author(s):  
TAKAMI MATSUO ◽  
YOSHINORI TOSHIMITSU ◽  
HARUO SUEMITSU
Keyword(s):  
Robust Control ◽  
Control Theory ◽  
Transmission Line ◽  
Robust Stability ◽  
Communication System ◽  
Communication Systems ◽  
Free Parameter ◽  
Chaotic Communication ◽  
Transmitted Signal ◽  
Robust Control Theory

In this paper, we introduce an observer-based chaotic communication system proposed by Grassi et al. to the transmitted signal of a dynamical compensator to improve the robustness of the cryptosystem. Specifically, we parameterize a synchronizer and an H∞synchronizer based on the robust control theory. Furthermore, we design a free parameter in the dynamics to improve the robust stability of the cryptosystem with respect to delays in the transmission line.

Fault Tree Analysis for a Modern Communication System

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Kamal Hamid ◽  
Nadim Chahine
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Theory And Practice ◽  
Tree Analysis ◽  
Satisfactory Performance ◽  
System Components ◽  
Link Budget ◽  
Simulation Results

Wireless communications became one of the most widespread means for transferring information. Speed and reliability in transferring the piece of information are considered one of the most important requirements in communication systems in general. Moreover, Quality and reliability in any system are considered the most important criterion of the efficiency of this system in doing the task it is designed to do and its ability for satisfactory performance for a certain period of time, Therefore, we need fault tree analysis in these systems in order to determine how to detect an error or defect when happening in communication system and what are the possibilities that make this error happens. This research deals with studying TETRA system components, studying the physical layer in theory and practice, as well as studying fault tree analysis in this system, and later benefit from this study in proposing improvements to the structure of the system, which led to improve gain in Link Budget. A simulation and test have been done using MATLAB, where simulation results have shown that the built fault tree is able to detect the system’s work by 82.4%.

scholarly journals Peptide signaling without feedback in signal production operates as a true quorum sensing communication system in Bacillus subtilis

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Iztok Dogsa ◽  
Mihael Spacapan ◽  
Anna Dragoš ◽  
Tjaša Danevčič ◽  
Žiga Pandur ◽  
...  
Keyword(s):  
Gene Expression ◽  
Bacillus Subtilis ◽  
Quorum Sensing ◽  
Cell Density ◽  
Communication System ◽  
Communication Systems ◽  
Feedback Loop ◽  
Signal Molecules ◽  
Specific Cell ◽  
Sharp Transition

AbstractBacterial quorum sensing (QS) is based on signal molecules (SM), which increase in concentration with cell density. At critical SM concentration, a variety of adaptive genes sharply change their expression from basic level to maximum level. In general, this sharp transition, a hallmark of true QS, requires an SM dependent positive feedback loop, where SM enhances its own production. Some communication systems, like the peptide SM-based ComQXPA communication system of Bacillus subtilis, do not have this feedback loop and we do not understand how and if the sharp transition in gene expression is achieved. Based on experiments and mathematical modeling, we observed that the SM peptide ComX encodes the information about cell density, specific cell growth rate, and even oxygen concentration, which ensure power-law increase in SM production. This enables together with the cooperative response to SM (ComX) a sharp transition in gene expression level and this without the SM dependent feedback loop. Due to its ultra-sensitive nature, the ComQXPA can operate at SM concentrations that are 100–1000 times lower than typically found in other QS systems, thereby substantially reducing the total metabolic cost of otherwise expensive ComX peptide.

scholarly journals Design Methodology of Passive In-Line Relays for Molecular Communication in Flow-Induced Microfluidic Channel

Biosensors ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 65
Author(s):  
Puneet Manocha ◽  
Gitanjali Chandwani
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Microfluidic Channel ◽  
Microfluidic Channels ◽  
Molecular Communication ◽  
External Energy ◽  
Lab On Chip ◽  
Molecular Communication Systems ◽  
Macro Scale ◽  
On Chip

Molecular communication is a bioinspired communication that enables macro-scale, micro-scale and nano-scale devices to communicate with each other. The molecular communication system is prone to severe signal attenuation, dispersion and delay, which leads to performance degradation as the distance between two communicating devices increases. To mitigate these challenges, relays are used to establish reliable communication in microfluidic channels. Relay assisted molecular communication systems can also enable interconnection among various entities of the lab-on-chip for sharing information. Various relaying schemes have been proposed for reliable molecular communication systems, most of which lack practical feasibility. Thus, it is essential to design and develop relays that can be practically incorporated into the microfluidic channel. This paper presents a novel design of passive in-line relay for molecular communication system that can be easily embedded in the microfluidic channel and operate without external energy. Results show that geometric modification in the microfluidic channel can act as a relay and restore the degraded signal up-to 28%.

scholarly journals Implementation of conventional communication system in deep learning

2017 ◽  
Vol 7 (1.1) ◽  
pp. 696
Author(s):  
Satyanarayana P ◽  
Charishma Devi. V ◽  
Sowjanya P ◽  
Satish Babu ◽  
N Syam Kumar ◽  
...  
Keyword(s):  
Machine Learning ◽  
Computer Vision ◽  
Communication Network ◽  
Deep Learning ◽  
Communication System ◽  
Communication Systems ◽  
Physical Layer ◽  
Learning Capacity ◽  
Constrained Learning ◽  
Complex Channel

Machine learning (ML) has been broadly connected to the upper layers of communication systems for different purposes, for example, arrangement of cognitive radio and communication network. Nevertheless, its application to the physical layer is hindered by complex channel conditions and constrained learning capacity of regular ML algorithms. Deep learning (DL) has been as of late connected for some fields, for example, computer vision and normal dialect preparing, given its expressive limit and advantageous enhancement ability. This paper describes about a novel use of DL for the physical layer. By deciphering a communication system as an auto encoder, we build up an essential better approach to consider communication system outline as a conclusion to-end reproduction undertaking that tries to together enhance transmitter and receiver in a solitary procedure. This DL based technique demonstrates promising execution change than traditional communication system.  

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