Multiplexing of discrete chaotic signals in presence of noise is investigated. The existing methods are based on chaotic synchronization, which is susceptible to noise, precision limitations, and requires more iterates. Furthermore, most of these methods fail for multiplexing more than two discrete chaotic signals. We propose novel methods to multiplex multiple discrete chaotic signals based on...

In this paper the notion of amplitude modulation of chaotic signals is introduced, similar to amplitude modulation of harmonic signal. Necessary conditions for modulation and demodulation of chaotic carrier are discussed. In particular, the type of chaotic carrier is discussed from the point of view of optimal demodulation. Demodulation accuracy estimates are also presented. Index terms – Chaot...

In this paper we study chaotic signals generated from Chua’s circuit: in particular we concentrate on the well known spiral attractor. Chaotic signals have a nonstationary nature, and hence the classical Fourier spectrum turns out to be inadequate for the analysis. Instead of it we use TimeFrequency Distributions, a powerful set of tools specifically designed for nonstationary signal analysis. ...

The relationship of the problem of chaotic signals cleaning off noise and information properties of signals is shown. Some methods for chaotic signals cleaning off are considered. An efficiency of these methods is evaluated by computer simulation.

In this paper the application of chaotic signals in ranging systems is addressed. In [1] the idea of using chaotic signals as ranging signals in continuous wave (CW) systems has been introduced and motivated. Possible benefits where also analysed. This paper describes realisation and signal processing problems in chaos based range and bearing estimation. All the signal processing is performed i...

In this paper, we discuss fundamentals for the design of a source of chaotic signals based on a blocking oscillator circuit. We study a modification of a well-known circuit of blocking oscillator which leads to the onset of chaotic oscillations. The output signal of such chaotic oscillator is a series of short term pulses characterized by chaotic fluctuations of time intervals between pulses. S...

Chaotic compressive sensing is a nonlinear framework for compressive sensing. Along the framework, this paper proposes a chaotic analog-to-information converter, chaotic modulation, to acquire and reconstruct band-limited sparse analog signals at sub-Nyquist rate. In the chaotic modulation, the sparse signal is randomized through state modulation of continuous-time chaotic system and one state ...

Starting from wavelet analysis of chaotic signals’ time-frequency characteristic, we propose a new harmonic signals extraction method using Empirical Mode Decomposition (EMD). We analyze features of chaotic signals using wavelet transform to determine the parameters of harmonic signals and interference signals. The harmonic signals as source signals are hidden within chaotic energy accumulation...