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Adaptive subspace-constrained diagonal loading
2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA), 2016Recently, a subspace-constrained diagonal loading (SSC-DL) method has been proposed for robust beamforming against the mismatched direction of arrival (DoA) issue. Although SSC-DL has outstanding output SINR performance, it is not clear how to choose the DL factor and subspace dimension in practice.
Yueh-Ting Tsai +3 more
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Efficient method to determine diagonal loading value
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2004It is well known that the performance of the adaptive beamforming algorithm is degraded when the sample support is short. The diagonal loading method is a simple and efficient method for improving the robustness of adaptive beamforming for such cases. Meanwhile, we are not aware of a formal approach to determine an optimal diagonal value to date.
Ning Ma, Joo Thiam Goh
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Sparse RLS adaptive filter with diagonal loading
2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012In this paper, we propose an adaptive algorithm for sparse identification. The algorithm is based on diagonal loading, reweighting, and coordinate descent iterations. Simulation results show that the algorithm has performance close to the performance of the oracle RLS algorithm with perfect knowledge of the support and yet has as low complexity as O(N)
Yuriy V. Zakharov, Vítor H. Nascimento
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On diagonal loading for minimum variance beamformers
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795), 2004Minimum variance beamformers are usually complemented with diagonal loading techniques in order to provide robust ness against finite sample size effects. In spite of its usefulness and popularity, some of the insights of this interesting technique have remained inconspicuous for decades.
X. Mestre, M.A. Lagunas
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The Bias of the MVDR Beamformer Outputs under Diagonal Loading
Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005., 2006The MVDR beamformer is the most extensively used array processing algorithm and involves inverting the sample covariance matrix. In the snapshot deficient scenario, when the number of sensors is greater than or approximately equal to the number of snapshots, the eigenvalues of the resulting sample covariance matrix are poorly conditioned.
Raj R. Nadakuditi, Alan Edelman
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Automatic diagonal loading for Tyler's robust covariance estimator
2016 IEEE Statistical Signal Processing Workshop (SSP), 2016An approach of regularizing Tyler's robust M-estimator of the co-variance matrix is proposed. We also provide an automatic choice of the regularization parameter in the high-dimensional regime. Simulations show its advantage over the sample covariance estimator and Tyler's M-estimator when data is heavy-tailed and the number of samples is small ...
Zhang, Teng, Wiesel, Ami
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Proceedings of the 2002 IEEE Radar Conference (IEEE Cat. No.02CH37322), 2003
We develop a beamforming technique called colored diagonal loading. This technique is a generalization of diagonal loading in which the covariance matrix is augmented with a scaled version of a colored matrix as opposed to using the identity matrix as with conventional diagonal loading.
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We develop a beamforming technique called colored diagonal loading. This technique is a generalization of diagonal loading in which the covariance matrix is augmented with a scaled version of a colored matrix as opposed to using the identity matrix as with conventional diagonal loading.
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Diagonally loaded space-time adaptive detection
Proceedings of 2011 IEEE CIE International Conference on Radar, 2011In this paper, the concept of space-time adaptive detection (STAD) is presented. The diagonally loaded adaptive matched filter (DL-AMF) and the diagonally loaded adaptive coherence estimation (DL-ACE) are analyzed. Their performance is investigated, and the asymptotically analytical expression of the probability of false alarm (PFA) and the probability
null Weijian Liu +2 more
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Acoustic beamforming through adaptive diagonal loading
2019 IEEE Symposium on Product Compliance Engineering - Asia (ISPCE-CN), 2019Acoustic beamforming is an important technology in microphone array signal processing. It relates to the acquisition of speech signals by intelligent devices in complex environments. Acoustic beamforming is to form spatial directivity of microphone array, enhance desired signal, and suppress interference and noise.
Xin Zhang +4 more
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An Improved Diagonal Loading Algorithm
2012Traditional adaptive beamforming methods undergo serious performance degradation in the presence of mismatches between the assumed array response and the true array response. In this paper, we propose an algorithm which belongs to the class of diagonal loading approach, but the diagonal loading factor is computed fully automatically from the array ...
Feng Wang, Jinkuan Wang, Xin Song
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