Design of far-field broadband beamformers using eigenfilters

摘要: In this paper two eigenfilter techniques are described for designing far-field broadband beamformers with an arbitrary spatial directivity pattern. For both the resulting filter is generalised eigenvector corresponding to minimum eigenvalue of real, symmetric and positive definite matrices. conventional technique a reference point needed, while in based on TLS (Total Least Squares) error criterion, not needed. It shown that linear constraints easily incorporated into design procedure. Both compared weighted least-squares technique.