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Visveshwaraiah Technological University Belgaum KNS Institute of Technology, Bengaluru

CHAOTIC COMMUNICATION Guided by: Mr. Pavan Kumar E B.E (lecturer ECE department)

By : Rudrappa J Shetti

Chaotic Communication , their Applications and 00000 Advantages over Traditional methods of Communication BY:RUDRAPPA J SHETTI 1KN05EC084

AGENDA •INTRODUCTION •DEFINITION OF CHAOS •CHAOTIC SYSTEM •CHAOTIC SIGNALS •ATTRACTORS •GENERATION OF CHAOTIC COMMUNICATION •PROPERTIES OF CHAOTIC COMMUNICATION •ADVANTAGES OVER TRADITIONAL METHODS •APPLICATIONS •CONCLUSION •QUESTIONS

INTRODUCTION 1 . Communication efficiently 2. Randomness 3.Chaotic Systems 4.Chaotic Signals 5.Security

CHAOS Chaos is aperiodic time-asymptotic behaviour in a deterministic system which exhibits sensitive dependence on initial conditions This definition contains three main elements: 3.Aperiodic time-asymptotic behaviour 5.Deterministic 7.Sensitive dependence on initial conditions

CHAOTIC SYSTEMS All systems can be basically divided into three types: 1.Deterministic systems 2. Stochastic systems 3. Chaotic systems

CHAOTIC SIGNALS •Chaotic signals has broadband spectrum •Power output remains constant •It is resistant against multipath fading •Chaotic signals are aperiodic •Chaotic signals are complex in structure • chaotic signals appear noise like •Hence chaotic signal can be used for providing security at physical level

ATTRACTORS

DEFINITION An attractor is informally described as strange if it has non-integer dimension or if the dynamics on it are chaotic. Chaotic attractor is also known as a strange attractor, a type of attractor (i.e., an attracting set of states) in a complex dynamical system's phase space

TYPES OF ATTRACTORS FIXED POINT LIMIT CYCLE

1.FIXED POINT

2.LIMIT CYCLE

An attractor that is represented by a particular point in phase space, sometimes called an equilibrium point. As a point it corresponds to a very limited range of possible behaviors of the system. A limit cycle is a periodic orbit of the system that is isolated.

HISTORY OF CSCS First generation

1.Additive chaos masking 2.Chaotic shift keying Second generation 1.Chaotic parameter modulation 2.Chaotic non-autonomous modulation Third generation 1.Chaotic cryptosystem Forth generation 1.impulsive synchronization based cscs

FIRST GENERATION ØThe additive chaos masking scheme chann el

The chaotic shift keying scheme

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SECOND GENERATION ØThe chaotic parameter modulation.

ØThe chaotic non-autonomous modulation. .

THIRD GENERATION Øchaotic cryptosystem

FOURTH GENERATION The impulse synchronization

Properties for Communications :•Why are we interested in chaos? ØCertain properties of chaotic systems are appealing for communications such as 1. Low power 2. Broadband spectra 3. Noise-like appearance 4. Auto and cross correlation properties 5. Low multipath interference

WHY CHAOTIC COMMUNICATION? Ø Digital msg sent at Gbps speeds over 115Kms Ø BER of one in ten million [ BER said to be limited by the equipment rather than the technique itself ] Ø Hard to detect by eavesdroppers Ø Less risk of interception

ADVANTEGS OF CHAOTIC COMMUNICATION 1. At high speed it is easier to generate strong , high power chaotic signals than periodic signals. 2. Chaotic signals are not sensitive to initial conditions and have a noise like time series. 3. Chaotic transmission has less risks of interception and are hard to detect by eavesdropper. 4. In chaotic communication, then on linear characteristic of communication devices are utilized instead of being avoided,

APPLICATIONS ü Used in Ultra Wide Band radio. ü Used in radar and sonar. ü Used in oscillator. ü Used in Chaotic masking . ü Used in spread spectrum. ü Used for secure

CONCLUSION A very brief overview on Chaotic communication has been described, explaining the systems, signals,synchronisations and a brief of histroy Chaotic communication .The majority of research carried out , to prove Chaotic communication has advantages over traditinal communication system . At last but not least application of Chaotic

QUEREIES?? ??

Thank you.

BY : RUDRAPPA J SHETTI