Abstract:
The purpose of this work is to experimentally prove the physical feasibility of coherent addition of chaotic signals (ultra-wideband chaotic radio pulses) in space and time. The idea of coherent addition is used in various ways in modern physics, and to date there are no examples of explicit demonstration of coherent addition of UWB chaotic signals. There are two difficulties associated with the impossibility of summation: firstly, until now it was unclear how to make signals of the same shape (a necessary condition for coherent addition), and secondly, how to implement the actual summation technique. Methods. The work used methods of full-scale prototyping of the processes of emission of ultra-wideband chaotic signals, their reception and numerical processing after digitization by an oscilloscope. The results were obtained on the basis of a model that includes eight identical emitters and one receiver. Results. Measurements of the signal shape at various reception points with different numbers of emitters were made. For the first time, a pattern of change (increase) in the mean-square signal amplitude at the reception point with coherent and incoherent summation of ultra-wideband chaotic signals with an increase in the number of emitters was experimentally established. Conclusion. Experimental and explicit demonstration, although explicit demonstration of the phenomenon of coherent summation of ultra-wideband chaotic signals is the basis for further development of multi-antenna ultra-wideband radio communication and radar. The results of this work created a technical reserve for further development of coherent summation methods. This in itself is unusual and has great practical novelty, since it allows creating a new class of multi-antenna ultra-wideband transceiver systems on chaotic (noise-like) signals.
Keywords:ultra-wideband signals, chaotic signals, coherent reception of chaotic signals, coherent emission of chaotic signals, generation of chaotic oscillation.
Fulltext:
PDF file (2160 kB)