Generation of Chaotic and Random Signals for Noise Radar - Brief Overview

Abstract

We present the main results of theoretical and experimental developments of noise and chaos generators for Noise Radar (NR), which is part of Noise Radar Technology (NRT), in the Laboratory for Nonlinear Dynamics of Electronic Systems (LNDES), O. Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Sciences of Ukraine (IRE NASU) since 1990. The Principles of Dynamical Chaotization is considered for generation of random/chaotic/noise signals in a wide range of frequencies: from P-band up to W-band. Various approaches to the chaos generators design are briefly described. P-band chaotic waveform oscillator with time-delayed feedback of ring type is described. Generation of noise signals directly in oscillatory systems containing a non-linear active electronic component is the most promising approach to design of a simple and efficient NR transmitter. Applications of Field Programmable Gate Array (FPGA) and Arbitrary Waveform Generators (AWG) for digital generation of pseudo-random signals are presented. Experimental testing showed high efficiency of FPGA-based pseudo-random signals for applications in radar with variety of sounding waveforms. The Chaos generators presented can be also used as a source of modulating signal in Voltage Controlled Oscillator (VCO) based NR transmitter.