Linearly-Constrained Beamforming: A Relationship Between Phase Center Location And Beampattern

spatial derivative constraints, is identified. Beamformer characteristics effected include interferer null depth and gain to white noise. This relationshb is investiaated. A criterion for choosing the phase center location is introduced and simucenter location on beampattern In this paper! a between the beampattern Of both lation examples are provided, illustrating the effect of phase narrowband and broadband linearly-constrained beamformers and the location of the array phase center is identified and investigated. It is shown that for a useful class of linear constraints on the beamformer weighting coefficients, that class of constraints which specify beampattern steer location spatial derivatives, this relationship is introduced, through the constraint equation, by sensor-to-phase center delays. A design criterion for choosing the phase center location is suggested and examples illustrating the effect of this location are presented.