Results 31 to 40 of about 123,247 (141)
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
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Adaptive Beamforming Applied to OFDM Systems [PDF]
Sensors, 2018 This work proposes an adaptive beamforming scheme applied to time domain, pre-FFT (Fast Fourier Transformation), Orthogonal Frequency-Division Multiplexing (OFDM) systems. This scheme improves the performance and the capacity of OFDM systems, using a supervised adaptive algorithm, with frequency domain multiplexed pilots of the OFDM system as a ...
Tiago F. B. De Sousa +2 more
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An Efficient Broadband Adaptive Beamformer without Presteering Delays
Sensors, 2021 Broadband adaptive beamformers have been widely used in many areas due to their ability of filtering signals in space domain as well as in frequency domain.
Ming Zhang, Xiaojian Wang, Anxue Zhang
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An efficient scheme for broadband adaptive beamforming [PDF]
Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020), 2003 This paper introduces an oversampled subband approach to linearly constrained minimum variance adaptive broadband beamforming. This method is motivated by the considerable reduction in computation over fullband implementation and resulting large computational complexity when fullband beamformers with high spatial and spectral resolution are required ...
Weiss, S. +4 more
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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
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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
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Mitigating Multiple Moving Interferers With the Hybrid Double Zero MVDR Beamformer
IEEE AccessInterferers with a high bearing rate challenge the ability of the minimum variance distortionless response (MVDR) beamformer to place accurate notches in the direction of the interferer.
Savas Erdim, John R. Buck
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Engineering Science and Technology, an International Journal, 2021 Ultrasound imaging is a largely used medical imaging system as it is safe, non-invasive, and capable of real-time imaging. In ultrasound imaging, different beamforming methods are used to obtain the image of the field of view.
Mayur Agarwal +2 more
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Null Broadening Robust Beamforming Based on Decomposition and Iterative Second-order Cone Programming [PDF]
Radioengineering, 2021 To solve the problem that the performance of adaptive beamformer degrades severely in the presence of steering vector mismatch or non-stationary interference, a null broadening robust beamforming based on decomposition and iterative second-order cone ...
W. Jin, Y. Z. Guo, W. M. Jia, J. W. Zhao
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Adaptive Beamforming With Continuous/Discrete Phase Shifters via Convex Relaxation
IEEE Open Journal of Antennas and Propagation, 2022 Adaptive antenna array employing phase shifters only can reduce the hardware cost and power consumption, but the related optimization is well understood to be difficult to solve.
Yinman Lee
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