| 摘要 |
The invention relates to a sonar system, comprising k acoustic detectors (1), for the detection and conversion of acoustic signals into electrical signals s(k); beamforming means (3) and a frequency analysis unit (4), which uses the signals s(k) to generate signals s(?i, fj), which represent acoustic signals with n frequencies fj (j=1...n) received from m beam reception directions ?i (i=1...m), and a data processing unit (5). The data processing unit (5) comprises a direction estimator unit (6), which generates for each of the n frequencies fj on the basis of at least a selection of the signals s(?i,fj) a narrowband estimator .OMEGA.NB(fj) of a direction .OMEGA. of an acoustic source, and subsequently on a selection of these .OMEGA.NB(fj) a broadband estimator .OMEGA.BB.
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