Generation of broadband noise-like signals for measurement and location purposes

Nonlinear dynamical systems with chaotic behaviour generate noise-like broadband signals by deterministic means. This suggests their use in broadband applications of various kinds. This paper considers the generation of chaotic signals and selected application fields with emphasis to measurements. Table 1.1 summarises the features for the application of chaotic systems and signals in different signal processing schemes. The second column describes properties which make chaos applications comparable and thus alternative to conventional techniques whereas the third column lists the properties which make the use of chaotic signals advantageous in comparison with existing solutions in the corresponding processing scheme. The following report summarises the results of our research in detail. It describes: How chaos generators can be designed and realised and what signal properties can be achieved (Sec. 2 and 3), how chaotic signals can be used in CDMA applications (Sec. 4.1), how chaotic signals can be used in system measurement (Sec. 4.2) and how chaotic signals can be applied in distance measurement (Sec. 4.3). Simulation and experimental results as well as prospective practical solutions are provided in each of the sections. An industrial application for system measurement is proposed in Sec. 4.2.2. A significant result is that the application of chaotic signals is of special advantage if the signal generation mechanism is reflected in the signal processing scheme. A promising approach for that is signal processing on the base of higher order statistics. (orig.)SIGLEAvailable from TIB Hannover: RR 7265(97,2) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman