Probing signals with zero autocorrelation zone for GPR onboard of unmanned aerial vehicle

Roman N. Ipanov, Aleksey A. Komarov


In connection with the growing shortage of water resources, especially in the arid regions of the planet, it is necessary to develop effective principles for the rapid search for relatively shallow aquifers. At present, there is a fairly wide class of ground penetrating radars (GPR) for industrial and commercial use that solve particular problems, namely: for soil analysis during the construction of various buildings and structures, for monitoring pavements and railways, for detecting various subsurface objects and urban underground utilities, for archaeological research, to study the ice cover, etc. However, these devices are intended for local use from the Earth’s surface and are not used for deep sounding of soil in the region and for work with unmanned aerial vehicles (UAVs). We propose a UAV-based GPR for the rapid search for shallow aquifers. In this work, for a GPR onboard of a UAV, a probing phase-code shift keyed (generally polyphase) signal is synthesized with an extremely low level of side lobes and a sufficiently large base for realizing the required energy potential of the GPR. A comparative analysis of the correlation characteristics of binary and three-phase PSs is carried out.


ambiguity function; autocorrelation function; complementary sequences; pulse train; zero autocorrelation zone


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