A multimode systolic array implementation for directions-of-arrival estimation via antenna array

Addresses the application of systolic arrays to direction-of-arrival estimation via antenna arrays. Combining the smoothing and prediction techniques in the spatial domain, the authors develop a smoothing/prediction autoregressive (S/P AR) predictor and implement it onto an efficient and fully pipelined systolic array which needs only one column of constraint cells, while the minimum variance distortionless response (MVDR) systolic array requires L columns of constraint cells to perform the Capon maximum likelihood (ML) spectrum for an L-sensor antenna array.