chaos shift keying-modulation of signal


Describes a technique for transmitting digital information using a chaotic carrier. Each symbol to be transmitted is coded as an attractor in Chua’s circuit. The symbols are detected at the receiver by cascaded self-synchronizing Chua’s circuit subsystems. A proof of the synchronization effect is demonstrated using weak assumptions on the statistical behavior of the chaotic carrier to be transmitted. Furthermore a bound for the average time of synchronization is given. Results of both practical experimentation and simulations are presented which verify the approach

Differential chaos shift keying : A robust coding for chaos communication
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The statistical attributes of the received chaotic signal are evaluated in the noncoherent chaos shift keying (CSK) modulation scheme in order to perform the demodulation. This approach offers a very simple circuit configuration, but like the other solutions proposed

Performance of differential chaos shift keying over multipath fading channels
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ÌHEinherently broadband nature of chaotic signals has Using chaotic signals for spreading introduces a non-zero variance in the transmitted energy per bit, which degrades the BER performance of DCSK. In , [10], FM was used to re- duce this variance. Alternatively, one can get constant

Design and analysis of an OFDM-based differential chaos shift keying communication system
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In this paper, a new non-coherent chaos -based communication scheme, named orthogonal frequency division multiplexing based different chaos shift keying (OFDM-DCSK), is presented inspired by multi-carrier direct sequence codedivision multiple access (MC-DS

Variable sequence length transmitter for noncoherent chaos shift keying
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This paper proposes a new transmitter for Noncoherent Chaos Shift Keying (CSK). In this scheme, the new transmitter can use a different chaotic sequence length N determined by an initial value. The performance of the communication system using the new transmitter is

Implementation of Differential Chaos Shift Keying Communication System Using Matlab-Simulink
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Spread spectrum communications have increased interest due to their immunity to channel fading and low probability of intercept. One of the limitations of the traditional digital spread spectrum systems is the need for spreading code synchronization. Chaotic communication is

Research on noncoherent detection for chaos shift keying
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An optimal noncoherent detection technique for Chaos Shift Keying (CSK) digital communication system is important for chaos -based communication – . However, calculation in the optimal noncoherent detection becomes complicated when chaotic

Design of the differential chaos shift keying communication system based on DSP builder
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Chaotic communication has the good secrecy. It is an important branch of the modern secure communication. Differential chaos shift keying (DCSK) communication system adopts shift keying to separate the reference signal and data signal. It has a strong resistance to the

Performance improvement of differential chaos shift keying modulation scheme
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Chaotic circuits and systems are deterministic dynamical systems which are operating in the unstable region from the conventional engineering point of view. The operation in unstable region is a necessary but not a sufficient condition to be satisfied if a chaotic behavior has to

Research on Differential Chaos Shift Keying Changing Deviation of Chaotic Sequence
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This paper investigates a performance of Differential Chaos Shift Keying (DCSK) using the chaotic sequence with biased values. In other words, a transmitted signal is changed by the deviation of the output of chaos depending on transforming a chaotic map. We carry out

Performing Modulation Scheme of Chaos Shift Keying with Hyperchaotic Chen System
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This paper presents the transmission of binary information by using chaotic switching named as Chaos Shift Keying (CSK) with a hyperchaotic Chen System. We used hyperchaotic Chen system added a periodic driving signal by Chen. This new variable (r. sin (cos (φt))) can be

A novel frequency modulated differential chaos shift keying modulation scheme based on phase separation
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In frequency-modulated differential chaos shift keying (FM-DCSK), the separation of the chaotic reference and information-bearing wavelets is performed in time domain. This separation method not only limits the attainable data rate but also demands delay

Equalization Using Neural Network Applied for Multiple Access Technique in Differential Chaos Shift Keying
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Using chaos for communication is a new field of research. Chaos communication has been studied for only a little more than a decade while traditional communication schemes have been developed for nearly a century. The hope was that for some application chaotic

Performance Evaluation of Orthogonal Multi-level Chaos Shift Keying Modulation Scheme Aided MIMO Wireless Communication System
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In this paper, a comprehensive study has been made on observing the performance of orthogonal multi-level chaos shift keying modulation scheme aided MIMO wireless communication system. The 4 4 multi antenna supported such simulated system

Differential chaos shift keying : A robust coding for chaos communication
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The statistical attributes of the received chaotic signal are evaluated in the noncoherent chaos shift keying (CSK) modulation scheme in order to perform the demodulation. This approach offers a very simple circuit configuration, but like the other solutions proposed

Design of Enhanced Differential Chaos Shift Keying Scheme
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Chaos Shift Keying is proposed and named Extended Differential Chaos Shift Keying (E- DCSK). Each pair of bits is modulated using two different versions of the same chaotic reference signal; the first information bit is modulated with the chaotic reference signal block

SUBOPTIMAL DETECTION OF MODIFIED LOGISTIC MAP-BASED CHAOS SHIFT KEYING MODULATION
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In this paper, a noncoherent chaotic shift keying with suboptimal recovery scheme is designed. The scheme uses a nonlinear chaotic map and its inverse for generating the chaotic sequence. The selection between two maps depends on the value of the input data

Efficient error correcting scheme for chaos shift keying signals.
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An effective error-correction scheme based on normalized correlation for a non coherent chaos communication system with no redundancy bits is proposed in this paper. A modified logistic map is used in the proposed scheme for generating two sequences, one for every

OPTIMAL MULTI-USER CHAOS – SHIFT – KEYING COMMUNICATION SYSTEMS
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Exact and approximate mathematical calculations of bit error rates (BER) for multi-user coherent chaos – shift – keying (CSK) communication system with correlation demodulator are presented in this paper. Almost exact results are obtained by applying the central limit

IMPROVED MULTI-CARRIER DIFFERENTIAL CHAOS – SHIFT KEYING SYSTEM: DESIGN AND ANALYSIS
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In this paper, an improved multi-carrier differential chaos – shift keying (IMC-DCSK) system is proposed. Instead of transmitting the chaotic reference sequence on a predefined subcarrier as in the conventional MC-DCSK, in our system, a DCSK-modulated signal whose bit period

New Approximations of Bit Error Rate in Chaos Shift – keying Systems
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Though the calculation of exact bit error rate in some simple chaotic shift – keying based systems has been reported by the same authors recently, an efficient approximation of bit error rate is still in demand. It is due to the fact that the numerical calculation of exact bit error


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