Multiple parameters estimation simultaneously for DS-SS/BPSK signal based on fourth-order cumulant 2D slice

2004 ◽  
Author(s):  
Zhenhui Shen ◽  
Bin Tang ◽  
Yan Lv ◽  
Xiaowu Zhu
Keyword(s):  
Fourth Order ◽  
Parameters Estimation ◽  
Multiple Parameters ◽  
Fourth Order Cumulant

scholarly journals Central DOA Estimation Method for Exponential-Type Coherent Distributed Source Based on Fourth-Order Cumulant

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Hao Li ◽  
Weijia Cui ◽  
Bin Ba ◽  
Haiyun Xu ◽  
Yankui Zhang
Keyword(s):  
Fourth Order ◽  
Exponential Type ◽  
Complexity Analysis ◽  
Estimation Method ◽  
Doa Estimation ◽  
Estimation Accuracy ◽  
Distributed Source ◽  
Sparse Array ◽  
Fourth Order Cumulant ◽  
Array Aperture

The performance of direction-of-arrival (DOA) estimation for sparse arrays applied to the distributed source is worse than that applied to the point source model. In this paper, we introduce the coprime array with a large array aperture into the DOA estimation algorithm of the exponential-type coherent distributed source. In particular, we focus on the fourth-order cumulant (FOC) of the received signal which can provide more useful information when the signal is non-Gaussian than when it is Gaussian. The proposed algorithm extends the array aperture by combining the sparsity of array space domain with the fourth-order cumulant characteristics of signals, which improves the estimation accuracy and degree of freedom (DOF). Firstly, the signal-received model of the sparse array is established, and the fourth-order cumulant matrix of the received signal of the sparse array is calculated based on the characteristics of distributed sources, which extend the array aperture. Then, the virtual array is constructed by the sum aggregate of physical array elements, and the position set of its maximum continuous part array element is obtained. Finally, the center DOA estimation of the distributed source is realized by the subspace method. The accuracy and DOF of the proposed algorithm are higher than those of the distributed signal parameter estimator (DSPE) algorithm and least-squares estimation signal parameters via rotational invariance techniques (LS-ESPRIT) algorithm when the array elements are the same. Complexity analysis and numerical simulations are provided to demonstrate the superiority of the proposed method.

scholarly journals Open Data, Models, and Codes for Vanadium Redox Batch Cell Systems: A Systems Approach Using Zero-Dimensional Models

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Seong Beom Lee ◽  
Kishalay Mitra ◽  
Harry D. Pratt ◽  
Travis M. Anderson ◽  
Venkatasailanathan Ramadesigan ◽  
...  
Keyword(s):  
Systems Approach ◽  
Open Data ◽  
Cell System ◽  
Parameters Estimation ◽  
Suitable Model ◽  
Source Codes ◽  
Multiple Parameters ◽  
C 30 ◽  
Vanadium Redox ◽  
Batch Cell

Abstract In this paper, we study, analyze, and validate some important zero-dimensional physics-based models for vanadium redox batch cell (VRBC) systems and formulate an adequate physics-based model that can predict the battery performance accurately. In the model formulation process, a systems approach to multiple parameters estimation has been conducted using VRBC systems at low C-rates (∼C/30). In this batch cell system, the effect of ions' crossover through the membrane is dominant, and therefore, the capacity loss phenomena can be explicitly observed. Paradoxically, this means that using the batch system might be a better approach for identifying a more suitable model describing the effect of ions transport. Next, we propose an efficient systems approach, which enables to help understand the battery performance quickly by estimating all parameters of the battery system. Finally, open source codes, executable files, and experimental data are provided to enable people's access to robust and accurate models and optimizers. In battery simulations, different models and optimizers describing the same systems produce different values of the estimated parameters. Providing an open access platform can accelerate the process to arrive at robust models and optimizers by continuous modification from the users' side.

scholarly journals Noise Reduction in Side Channel Attack Using Fourth-Order Cumulant

2007 ◽  
Vol 2 (4) ◽  
pp. 710-720 ◽  
Author(s):  
Thanh-Ha Le ◽  
Jessy Clediere ◽  
Christine Serviere ◽  
Jean-Louis Lacoume
Keyword(s):  
Noise Reduction ◽  
Fourth Order ◽  
Side Channel ◽  
Side Channel Attack ◽  
Fourth Order Cumulant

On the stretching of material lines and surfaces in isotropic turbulence with zero fourth cumulants

1955 ◽  
Vol 51 (2) ◽  
pp. 350-362 ◽  
Author(s):  
W. H. Reid
Keyword(s):  
Fourth Order ◽  
Isotropic Turbulence ◽  
Constant Width ◽  
Scalar Fields ◽  
Volume Element ◽  
Strain Rates ◽  
Arbitrary Vector ◽  
Material Volume ◽  
Fourth Order Cumulant ◽  
Molecular Conduction

ABSTRACTThe convective effects of isotropic turbulence on arbitrary vector and scalar fields satisfying certain conservation conditions are studied under the assumption that all fourth-order cumulant tensors are zero. In the absence of molecular conduction, the behaviours of such vector and scalar fields are related to those of material lines and surfaces respectively, and the diffusive action of the turbulence results in a stretching of these lines and surfaces. The present analysis leads to a definite prediction for the corresponding strain rates which suggests that an initially spherical material volume element is drawn out into a long thin ribbon of constant width.

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