A Maneuvering Uniform Circular Array of Directional Sensors for Improved Source Localization Accuracy
Houcem Gazzah · IEEE Transactions on Aerospace and Electronic Systems · 2017
Uniform circular arrays require a minimum number of directional sensors to ensure identical estimation accuracy at all possible directions-of-arrival. We study smaller uniform circular arrays and compensate for the loss in accuracy (Cramer-Rao bound) by a proper array orientation. We calculate, in a closed-form manner and based on the available source prior, the best (Fisher information maximizing) array direction. This scheme is suitable to autonomous unmanned vehicles who have maneuvering capabilities and accommodate minimally-sized arrays.