Results 261 to 270 of about 25,608 (296)

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 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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Coarseness in OTHR Image and Its Application for Diagonal Loading Factor Determination

IEEE Geoscience and Remote Sensing Letters, 2020
The sky-wave over-the-horizon radar is easily interfered with by radio frequency interference (RFI) since the high-frequency band is shared by many radio devices. Various RFI suppression techniques have been developed by both spatial and temporal processing.
Zhaoyi Wang, Zhongtao Luo, Zishu He, Shengnan Shi   +3 more
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Wideband Automatic Diagonal-Loading Beamformers for Acoustic Imaging

2009 2nd International Congress on Image and Signal Processing, 2009
The data-independent delay-and-sum beamformer (DAS) is widely used for acoustic imaging applications, although it has lower resolution and worse interference rejection capability than the standard Capon beamformer (SCB). However, the performance of SCB can be degraded by many factors existed in practice, for example, array covariance matrix estimation ...
Qi Xu, Xiaochuan Ma, Jun Yang
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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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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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Closed-form Pd expression for diagonally-loaded GLRT

IEEE Transactions on Aerospace and Electronic Systems, 2007
The recent paper by Shnidman [1] introduced two new models for radar target fluctuation. One of them is the noncentral gamma-gamma (NCGG) distribution, specified by a density function expressed as an infinite sum. It is shown here that one can actually derive an expression for the density in terms of the confluent hypergeometric function.
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A class of diagonally loaded robust Capon beamformers for noncircular signals of interest

Signal Processing, 2014
Diagonal loading is a simple and effective method for robustness enhancement of the Capon beamformer against perturbation in the presumed steering vector of the signal-of-interest (SOI). However, the determination of an appropriate diagonal loading level is not a trivial task.
Yougen Xu, Jingyan Ma, Zhiwen Liu, Wei Liu 0001   +3 more
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