Results 251 to 260 of about 808,226 (293)

Diagonal Loading Level Estimation For Robust Beamforming

2006 CIE International Conference on Radar, 2006
Often in practice the knowledge of the array steering vector is imprecise, the Capon beamformer may suffer considerable performance degradation. In order to improve the robustness of the Capon beamformer, diagonal loading has been a popular method. However, for most of these methods, it is not clear how to choose the appropriate diagonal loading level.
Cao Zeng, Guisheng Liao, Zhiwei Yang
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Diagonal Loading for STAP and Its Performance Analysis

2010 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM), 2010
For the moving target detection with space-time adaptive processing (STAP), the non- homogeneity will cause the covariance matrix estimation error, which substantially results in the STAP performance degradation. Diagonal loading has long been used as a means to improve the robustness of the spatial filter against mismatches in both the desired spatial
Xiaojun Liu, Congfeng Liu, Guisheng Liao
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Insertion of diagonal loading into the multistage Wiener filter

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2002, 2003
Diagonal loading is a well-known technique for adding robustness to beamformer solutions. Diagonal loading will add robustness to steering vector direction-of-arrival mismatch; element position, gain, and/or phase perturbations; "statistical" mismatch due to finite sample support; etc.
J.D. Hiemstra, M.E. Weippert, H.N. Nguyen, J.S. Goldstein   +3 more
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A novel alternative to diagonal loading for robust adaptive beamforming

Proceedings of the Eighth International Symposium on Signal Processing and Its Applications, 2005., 2006
Diagonal loading has proved an effective way to improve the robustness of the optimum beamformer. However, the diagonal loading value must be properly chosen to achieve this. In this paper we propose a Bayesian beamformer for dealing with uncertainty in array configuration and source direction of arrival.
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Adaptive detection with diagonal loading (for adaptive antenna array)

International Conference on Acoustics, Speech, and Signal Processing, 2002
An adaptive detector with diagonal loading is presented, and although it is not CFAR (constant false alarm rate), it is conjectured that its probability of false alarm can at least be upper bounded by choosing the appropriate threshold for the adaptive matched filter detector.
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A joint frequency and DOA estimation algorithm with diagonal load

2012 IEEE Aerospace Conference, 2012
We have developed a novel method for joint frequency and 2D angle estimation of incoming signals upon a circular array over a very wide frequency band (2–18 GHz)[1]. This paper presents the algorithm with diagonal load for robust performance with improved accuracy and resolution.
R. J. Weber, null Yikun Huang
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A Recursive Algorithm to Robust Adaptive Beamforming and Diagonal Loading

2006 6th World Congress on Intelligent Control and Automation, 2006
When adaptive arrays are applied to practical problems, the performance degradation of adaptive beamforming techniques may become even more pronounced than in the ideal case because some of underlying assumptions on the environment, sources, or sensor array can be violated and this may cause a mismatch between the presumed and actual signal steering ...
null Xin Song, null Jinkuan Wang, null Yinghua Han, null Yanbo Xue   +3 more
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Robust adaptive beamforming with variable diagonal loading

6th IEE International Conference on 3G and Beyond (05/11182), 2005
In this paper, we propose an alternative realization of the robust adaptive linearly constraint minimum variance (LCMV) beamforming which including ellipsoidal uncertainty constraint on the steering vector. More specifically, the genuine steering vector is estimated from the presumed steering vector using recursive steepest descent (RSD) algorithm with
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Beamforming algorithm of diagonal loading based on matrix decomposition

2011 4th IEEE International Conference on Broadband Network and Multimedia Technology, 2011
In the beamforming algorithm of the matrix decomposition, through QR decomposition of data matrix, the QR decomposition algorithm transforms the problem of solving the weighted vector into the problem of solving a triangular linear equations, which avoids to estimating and inversing of array signal covariance matrix, improves the robustness of the data;
Zhaohua Zeng, Wenjuan Liang, Jianhong Zhang   +2 more
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Strength at Diagonal Cracking under Uniform Load

Journal of the Structural Division, 1974
This note presents an analysis by which the cracking strength may be evaluated independent of the location of the critical section. The approach is essentially statistical. The diagonal cracking load is a function of the following variables: 1) the total diagonal cracking load on the beam; 2) the effective depth of the beam; 3) length of span; 4) width
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