Robust Wideband Beamforming With Frequency Response Variation Constraint Subject to Arbitrary Norm-Bounded Error

• Published in: IEEE transactions on antennas and propagation Vol. 60; no. 5; pp. 2566 - 2571
• Main Authors: Zhao, Yong, Liu, Wei
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Arrays; Beamforming; Consistency; Distortion; Errors; Exact sciences and technology; Frequency invariance; Frequency response; frequency response variation; Interference; Manifolds; Narrowband; robust wideband beamformer; Robustness; Signal to noise ratio; steering vector error; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Vectors; Wideband; Wide band; frequency response variation; steering vector error; robust wideband beamformer; Signal processing; Frequency response; Invariance; Sampling; Closed form equation; Frequency invariance; Narrow band; Beam forming
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2012.2189721

Traditional robust wideband beamforming is mainly achieved by extending the narrowband robust beamforming methods to the wideband case through frequency sampling with robust constraints imposed on different frequency points separately. The resultant beamformer may have different responses at different frequencies, causing intolerable distortion to the desired signal. To improve the frequency response consistency of the beamformer against arbitrary array manifold errors, a novel robust beamformer is proposed with a closed-form solution. A previously proposed robust beamformer can be considered as its special case.