Direction-of-arrival estimation and detection using weighted subspace fitting

AbstmclThe problem of estimating tlie dircetioes of arrival of n&ow band signals, impinging on an array of sensors is addressed. An estimation procedure. which nw plies to arbitrary nrray structures and signnl correlation i? ptopo*cecl.. The method ia bared on thc rrcvntly iutrodnccd Weighted Subspace Fitti+ (WSF) crit.crios. A Gauss-Newlon type algorithm is suggested for minimizing the WSF criterion. A new doteelion scheme ia "1.0 formtiInted, bmod on tho nsymptntic distribution of tho WSF cost function: Siniulntioiis are presented, demonstrating the improv&inent of tho proposed WSF bnsed approaches, over similar tcchniqii6s hnscd on deterministic Mnximoni Likelihood (ML) .

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