Results 31 to 40 of about 9,393 (232)
Phased Array Feed Calibration, Beamforming and Imaging [PDF]
, 2009 Phased array feeds (PAFs) for reflector antennas offer the potential for increased reflector field of view and faster survey speeds. To address some of the development challenges that remain for scientifically useful PAFs, including calibration and ...
Alan Stemmons +42 more
core +1 more source
Robust adaptive beamforming using a Bayesian steering vector error model [PDF]
, 2013 We propose a Bayesian approach to robust adaptive beamforming which entails considering the steering vector of interest as a random variable with some prior distribution.
Besson, Olivier, Bidon, Stéphanie
core +1 more source
Genetic algorithm assisted adaptive beamforming [PDF]
Proceedings IEEE 56th Vehicular Technology Conference, 2003 Genetic algorithm (GA) assisted beamforming techniques are proposed as an alternative to conventional beamforming algorithms. The design of the corresponding GAs is highlighted and the achievable performance is characterised in terms of the signal-to-interference ratio (SIR) and the signal-to-interference-plus-noise ratio (SINR).
Vitale, M. +3 more
openaire +2 more sources
Adaptive Beamforming With Software-Defined-Radio Arrays
IEEE Access, 2022 Digital beamforming is the holy grail of antenna array technologies, however implementing digital beamforming into practical antenna arrays has been slow due to hardware complexity and cost.
Daniel Christopher Gaydos +2 more
doaj +1 more source
Phased-MIMO Radar: A Tradeoff Between Phased-Array and MIMO Radars [PDF]
, 2009 We propose a new technique for multiple-input multiple-output (MIMO) radar with colocated antennas which we call phased-MIMO radar. The new technique enjoys the advantages of MIMO radar without sacrificing the main advantage of phased-array radar which ...
Aboulnasr Hassanien +2 more
core +2 more sources
On convergence of the auxiliary-vector beamformer with rank-deficient covariance matrices [PDF]
, 2009 The auxiliary-vector beamformer is an algorithm that generates iteratively a sequence of beamformers which, under the assumption of a positive definite covariance matrix R, converges to the minimum variance distortionless response beamformer, without ...
Besson, Olivier +2 more
core +1 more source
Constant beamwidth generalised sidelobe canceller [PDF]
, 2006 In this paper, we proposed a constant beamwidth discrete Fourier transform (DFT) beamformer based on the generalised sidelobe canceller (GSC). Broadband signals are decomposed into frequency bins which are grouped into octaves and tapered individually ...
Koh, Choo Leng, Weiss, Stephan
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Robust Quaternion-valued Wideband Adaptive Beamforming
Leida xuebao, 2019 A robust quaternion-valued wideband adaptive beamformer is proposed, in which a quaternion is utilized to arrange the output of the array element. By exploiting the augmented envelope alignment technique, adopting the three involutions of quaternion, and
DUAN Xiaofei, LIU Zhiwen, XU Yougen
doaj +1 more source
Steering vector errors and diagonal loading [PDF]
, 2004 Diagonal loading is one of the most widely used and effective methods to improve robustness of adaptive beamformers. In this paper, we consider its application to the case of steering vector errors, i.e.
Besson, Olivier, Vincent, François
core +1 more source
Journal of Algorithms & Computational Technology, 2009 In shallow water areas, to enhance underwater targets detection performance improve computation efficiency of active sonar, a computationally efficient adaptive beamformer (spatial filter) based on inverse QR (IQR) and recursive least-squares (RLS) is ...
Q. Wang, X. Pan
doaj +1 more source