Array robustness to sensor failure

The presence of uncertainties in the array response results in a performance degradation often greater than the application requirements can afford. Although various attempts have been made to measure the effect of uncertainties on direction finding algorithm performance, the impact of sensor response uncertainties on the ultimate array DF capabilities has not been considered thoroughly. In this paper, the sensitivity of an array´s DF capabilities to sensor response errors is formulated. Robustness and reliability measures are proposed, which can be used as tools for the evaluation of each sensor´s importance within the array geometry and as criteria for the comparison of a number of array geometries