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Entramado

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Abstract

MACHADO-FERNANDEZ, José Raúl  and  BACALLAO-VIDAL, Jesús de la Concepción. Estimation of the Optimal CA-CFAR Threshold Multiplier in Pareto Clutter with Known Parameters. Entramado [online]. 2017, vol.13, n.1, pp.252-261. ISSN 1900-3803.  http://dx.doi.org/10.18041/entramado.2017v13n1.25104.

The performance of the CA-CFAR processor is affected by certain clutter variations. Although problems caused by sudden clutter changes have already been corrected in multiple CFAR proposals, the influence of slow statistical variations in the background signal is often ignored. To solve this problem, the authors estimated the optimal CA-CFAR threshold multiplier values necessary to adapt the processor to the clutter slow statistical changes. The application of the results guarantees that the operational false alarm probability of the processor will only exhibit a small deviation from the value conceived in the design. The clutter was simulated with a Pareto distribution with a known fluctuating shape parameter according to recent papers that strongly suggest the use of this distribution. The current research completes an important step in the design of an adaptive detector that operates without a priori knowledge of the shape parameter In addition, the authors provide mathematical expressions that allow the direct application of the results in the design of radar detectors.

Keywords : Constant false alarm rate detectors; Pareto distribution; radar clutter false alarm probability adaptive selection of the threshold multiplier CFAR processors.

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