|START||NEW VOL 20||SEARCH||STATISTICS||PAS - GDANSK DIVISION|
pp. 117-124, vol. 8, 2005
Institute of Telecommunications of UTA, Bydgoszcz, Poland
Abstract: The main problem associated with detecting and locating of objects by means of radiolocation and hydrolocation systems is the appropriate selection of transmitting signals. These signals need to be difficult to detect by the watched object and need to be resistant to disturbances. The most often used ones are signals with linear frequency modulation (chirp signals) and signals with phase coding. New possibilities of the realization of complex signals appeared along with development of the digital technique. The usage of signal composite from short signals with linear frequency modulation with use of phase coding was analysed in this paper. Short noise-like sequences (Barker’s codes) were used for coding the initial phase of chirp signals. This article presents results of research obtained for a signal of this type, at its identification by means of matching filtration. These results were compared with results obtained for single signal with linear frequency modulation with the same duration and bandwidth.
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