Performance of an Adaptive Array under Sensor Failure. (Reannouncement with New Availability Information).

摘要

It has been reported that during experiments with linear arrays at sea, sensor failure occurs with nearly 100% probability. An upper bound on the increase in sidelobe level for a non-adaptive weighted array with inoperative elements has been reported. In this paper, we consider the performance of a narrow-band adaptive array which has failed sensors. Assuming that each sensor fails independently of each other and with equal probability, expressions for the expected SINR and variance are given. The mean minus three sigma is then used to lower bound the SINR under sensor failure. Simulations results verify the analysis for the expected SINR and show that the lower bound holds in 98% of the cases.