Title :
On derivative constrained broad-band beamforming
Author :
Er, M.H. ; Ng, B.P.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
fDate :
3/1/1990 12:00:00 AM
Abstract :
The authors present a set of constraints for controlling the spatial derivatives of the beam pattern of a flat-response broadband processor. The constraints ensure that the beam pattern of the processor is independent of the choice of phase center location. It is shown that for the first-order case the set of constraints is linear, but for the second-order case the set of constraints is linear and quadratic. The authors then present a method for approximating the quadratic constraint with two linear constraints
Keywords :
antenna arrays; antenna radiation patterns; antenna theory; antenna arrays; beam pattern; broad-band beamforming; derivative constrained; first-order case; flat-response broadband processor; linear constraints; phase center location; quadratic constraint; second-order case; spatial derivatives; Acoustics; Array signal processing; Degradation; Erbium; Linear antenna arrays; Phased arrays; Power engineering and energy; Speech processing; Sufficient conditions; Vectors;
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
