Generalized partially adaptive concentric ring array

The partially adaptive array is important to increase the tracking ability and reduce the computation of a large array for beamforming. We generalize the partially adaptive array design method for a concentric ring array (CRA). The generalized design accommodates arbitrary partitioning of the CRA and is not confined to dividing the whole array into different rings, as in a previous design (Li, Y. et al., 2004). The proposed method provides flexible control of the number of degrees of freedom in the partially adaptive CRA, which is favorable in a highly hostile signal environment, with many interference sources, that requires fast convergence and small residual error. We further examine the convergence speed improvement and the steady state residual interference and noise power using the proposed design for several partitioning schemes through simulation.