А.V. Мoroz1, V.P. Savchenko2

1–3 “Academician A.L. Mints Radiotechnical Institut” JSC (Moscow, Russia)
 

By means of MATLAB computer modelling, receiver operation characteristics (ROC) of the UWB single pulse radar are investigated for small size low flying objects in the earth lower atmosphere. ROC estimation is done for a single UWB pulse that is assumed to be a sum of independent Gaussian signal, clutter and noise. The signal has unknown mean value that and is interpreted as a deterministic one of an unknown form while clutter and noise are assumed to be of unknown and known dispersion respectively. Known uncoherent (energy) detection schema is used. Input signal from receive antenna that is assumed to be a parabolic, after low noise amplification and filtering is digitized. Squared samples are summed in a number of short strobes that provide range multichannel detection scheme. Range detection parameter is derived from the UWB radar equation where overall band is subdivided into a number of narrow bands and partial results for each narrow band are integrated. Terrain influence is introduced via a loss parameter that is dependent upon clutter type, grazing angle, frequency and other model parameters. Longley-Rice model and digital maps are used to calculate expected signal to noise plus interference ratio. Objects of RCS ~0.2m2 at heights ~20m and ranges ~7km are found to be detectable for “woods” environment and UWB parameters reported elsewhere as practically achievable. The results are expected to be useful for preliminary performance estimation of ground-based UWB radars in specific geographical areas.

Мoroz А.V., Savchenko V.P. Synthesis of the UWB receiver and ROC estimation for small low flying objects in the earth lower atmosphere. Science Intensive Technologies. 2022. V. 23. № 5. P. 16−24. DOI: https://doi.org/10.18127/j19998465-202205-03 (in Russian)

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