Topic
Adaptive beamformer
About: Adaptive beamformer is a research topic. Over the lifetime, 4934 publications have been published within this topic receiving 93100 citations.
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18 citations
TL;DR: In this paper, a new technique for re-computing shading parameters for low sidelobe levels for a radar or sonar system is disclosed, when some of the sensor elements become inoperative, remaining shading parameters are recomputed using a new constraint.
Abstract: A new technique for re-computing shading parameters for low sidelobe levels for a radar or sonar system is disclosed. When some of the sensor elements become inoperative, remaining shading parameters are recomputed using a new constraint. This approach leads to an overall gain pattern that is superior compared to the one without re-computing the weights.
18 citations
23 Mar 1992
TL;DR: A microphone array for speech recording in car environments, designed for hands-free radiotelephone, and also used as a front-end for an automatic speech recognition system.
Abstract: The authors describe a microphone array for speech recording in car environments. The array is designed for hands-free radiotelephone, and is also used as a front-end for an automatic speech recognition system. The configuration of the array and the adaptive beamforming technique implemented are described and the performance of the array are evaluated. The measure of performance is the score obtained with a speech recognition system. Within the European ESPRIT project ARS (adverse environment recognition of speech), a prototype of this microphone array was built. It has eight microphones and works in real time, using one TMS C30 processor. >
18 citations
TL;DR: A robust STAP method is devised by introducing an accurate steering vector estimator and a non-convex quadratically constrained quadratic program (QCQP), which is solved using the semidefinite programming (SDP) relaxation technique.
18 citations
TL;DR: An algorithm has been developed to control the antenna array beam pattern for satellite communication applications where the uplink received antenna is desired to provide beamforming capability for selective earth coverage and jamming protection.
Abstract: An algorithm has been developed to control the antenna array beam pattern for satellite communication applications where the uplink received antenna is desired to provide beamforming capability for selective earth coverage and jamming protection. The problem can be formulated to determine the antenna weight to meet the user gain and jammer null requirements in their known directions, subject to the norm bound constraint of the weight. The algorithm makes use of the orthogonal decomposition of the weight vector and a recursive procedure that provides flexibility in the determination of the constraint vectors, the constraint order, and the constraint phase optimization.
18 citations