scholarly journals Chaos for communication

2021 ◽  
Author(s):  
Murilo S. Baptista
Keyword(s):  
Information Content ◽  
Lyapunov Exponents ◽  
Communication System ◽  
Linear Superposition ◽  
Chaotic Signals ◽  
Physical Medium ◽  
Periodic Signals ◽  
Low Probability ◽  
Chaotic Interference ◽  
Source Signals

AbstractThis work shows that chaotic signals with different power spectrum and different positive Lyapunov exponents are robust to linear superposition, meaning that the superposition preserves the Lyapunov exponents and the information content of the source signals, even after being transmitted over non-ideal physical medium. This work tackles with great detail how chaotic signals and their information content are affected when travelling through medium that presents the non-ideal properties of multi-path propagation, noise and chaotic interference (linear superposition), and how this impacts on the proposed communication system. Physical media with other non-ideal properties (dispersion and interference with periodic signals) are also discussed. These wonderful properties that chaotic signals have allow me to propose a novel communication system based on chaos, where information composed from and to multiple users each operating with different base frequencies and that is carried by chaotic wavesignals, can be fully preserved after transmission in the open air wireless physical medium, and it can be trivially decoded with low probability of errors.

scholarly journals Wireless Chaos-Based Communication System: Literature Review

2021 ◽  
Vol 2 (1) ◽  
pp. 46-54
Author(s):  
Siti Hadiaty Yuningsih ◽  
Sudradjat Supian ◽  
Sukono Sukono ◽  
Subiyanto Subiyanto
Keyword(s):  
Literature Review ◽  
Communication System ◽  
Communication Systems ◽  
Additive Noise ◽  
Poor Performance ◽  
Chaotic Synchronization ◽  
Coherent Detection ◽  
Energy Data ◽  
Chaotic Signals ◽  
Nonlinear Signal

Since the early 1990s, a slew of chaotic-based communication systems have been proposed, all of which take advantage of chaotic waveform properties. The inspiration stems from the substantial benefits that this form of nonlinear signal offers. Many communication schemes and applications have been specifically designed for chaos-based communication systems to achieve this goal, with energy, data rate, and synchronization awareness being taken into account in most designs. However, non-coherent chaos-based systems have recently received a lot of attention in order to take advantage of the benefits of chaotic signals and non-coherent detection while avoiding the use of chaotic synchronization, which has poor performance in the presence of additive noise. This paper provides a thorough examination of all wireless radio frequency chaos-based communication systems. It begins by describing the difficulties of chaos implementations and synchronization processes, then moves on to a thorough literature review and study of chaos-based coherent techniques and their applications.

scholarly journals Secure Communication System Using Chaotic Signals

2009 ◽  
Vol 10 (1) ◽  
pp. 21-27
Author(s):  
Isaac Campos-Cantón ◽  
◽  
Eric Campos-Cantón ◽  
José Salomé Murguía-Ibarra ◽  
Mayra Elizabeth Chavira-Rodríguez ◽  
...  
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
Chaotic Signals

The programmable CPG model based on Matsuoka oscillator and its application to robot locomotion

2020 ◽  
Vol 11 (03) ◽  
pp. 2050018
Author(s):  
Qiang Lu ◽  
Zhaochen Zhang ◽  
Chao Yue
Keyword(s):  
Significant Contribution ◽  
Central Pattern Generators ◽  
Robot Locomotion ◽  
Model Based ◽  
Chaotic Signals ◽  
Periodic Input ◽  
Periodic Signals ◽  
Pattern Generators ◽  
Sine Signal ◽  
Control Locomotion

The central pattern generator (CPG) is an important functional unit in the spinal cord which can produce rhythmic signals to control locomotion. Recently, there has been a growing interest in programmable central pattern generators (PCPG). In this paper, a new PCPG oscillator and a generic PCPG model based on the Matsuoka oscillator are presented. The perturbation method is used to determine the convergence of the generic PCPG model. The sine signal, the mix signal and chaotic signals are provided as inputs to the model, and the simulation results show that the generic PCPG can learn arbitrary periodic signals. In this paper, the generic PCPGs are allocated at each joint of the compass-like and the three-link robots and their outputs are chosen as joint position commands. The simulations show that the generic PCPG can be used to control robot locomotion effectively. The contributions of this paper are as follows: (1) A new PCPG oscillator based on the Matsuoka oscillator is presented as a beneficial enhancement to the PCPG oscillators. (2) A generic PCPG model is built comprising three PCPG oscillators. It can learn any periodic input signal. These findings are a significant contribution to generic PCPG research.

Information content of chaotic signals

1989 ◽  
Vol 40 (3) ◽  
pp. 367-372 ◽  
Author(s):  
H G Schuster
Keyword(s):  
Information Content ◽  
Chaotic Signals

scholarly journals DESIGN OF A HYPERCHAOTIC CRYPTOSYSTEM BASED ON IDENTICAL AND GENERALIZED SYNCHRONIZATION

1999 ◽  
Vol 09 (10) ◽  
pp. 2027-2037 ◽  
Author(s):  
MICHELE BRUCOLI ◽  
DONATO CAFAGNA ◽  
LEONARDA CARNIMEO ◽  
GIUSEPPE GRASSI
Keyword(s):  
Communication System ◽  
Complex Dynamics ◽  
Generalized Synchronization ◽  
Parameter Modulation ◽  
Low Degree ◽  
Chaotic Signals ◽  
Simulation Results ◽  
Modulation Methods ◽  
Chaotic Parameter

In this paper identical and generalized synchronization and the complex dynamics of hyperchaotic circuits are exploited for designing reliable cryptosystems. Since chaotic additive masking, chaotic switching and chaotic parameter modulation methods can have a low degree of security, an attempt to overcome this drawback is made by utilizing hyperchaotic circuits which make available several chaotic signals. Some of these signals are used to properly synchronize the encrypter and the decrypter in an identical and generalized way. Other chaotic signals are considered for encrypting and decrypting the information messages by means of a multishift cipher scheme. The approach is applied to a communication system constituted by an encrypter and a decrypter each consisting of two coupled Chua's circuits, unidirectionally coupled with two coupled Chua's oscillators. Simulation results are reported to show the performance of the suggested cryptosystem.

A ROBUST DEMODULATION APPROACH TO COMMUNICATIONS USING CHAOTIC SIGNALS

2003 ◽  
Vol 13 (01) ◽  
pp. 227-231 ◽  
Author(s):  
XIAO FAN WANG ◽  
ZHI QUAN WANG
Keyword(s):  
Chaotic System ◽  
Communication System ◽  
Information Signal ◽  
Key Innovation ◽  
Chaotic Signals ◽  
Transmitted Signal

In this Letter, a new demodulation approach to communication using chaotic signals is presented. Information signal is modulated by applying it as an input to a chaotic system. At the receiver, a synchronous subsystem is constructed for estimates on the states of the chaotic system. The key innovation in our communication system is a new robust filter that recovers the information signal from the scalar transmitted signal.

scholarly journals Design of Synchronized Large-Scale Chaos Random Number Generators and Its Application to Secure Communication

2019 ◽  
Vol 9 (1) ◽  
pp. 185 ◽  
Author(s):  
Teh-Lu Liao ◽  
Pei-Yen Wan ◽  
Jun-Juh Yan
Keyword(s):  
Communication System ◽  
Secure Communication ◽  
Large Scale ◽  
Random Number ◽  
Sliding Mode ◽  
Random Number Generators ◽  
Dc Offset ◽  
Synchronization Problem ◽  
Chaotic Signals ◽  
Duffing Map

This paper is concerned with the design of synchronized large-scale chaos random number generators (CRNGs) and its application to secure communication. In order to increase the diversity of chaotic signals, we firstly introduce additional modulation parameters in the original chaotic Duffing map system to modulate the amplitude and DC offset of the chaotic states. Then according to the butterfly effect, we implement modulated Duffing map systems with different initial values by using the microcontroller and complete the design of large-scale CRNGs. Next, a discrete sliding mode scheme is proposed to solve the synchronization problem of the master-slave large-scale CRNGs. Finally, we integrate the aforementioned results to implement an innovative secure communication system.

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