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Two-dimensional Circular array Real-time Phase Interferometer Algorithm and Its Correction

Two-dimensional Circular Array Real-time Phase Interferomete...

引用

2nd International Congress on Image and signal processing

作者： Xun Yang Cui Zhang-zhong Beijing Inst Technol Mechatron Engn & Control Key Lab Natl Def Beijing 100081 Peoples R China

ISBN: (纸本)9781424441303

A direction finding algorithm of two-dimensional circular array phase interferometer with three antennas is introduced. The expressions of pitch angle and azimuth are given, and they can be extended to two-dimensional circular array phase interferometer with more antennas. We also analyze the factors that caused the error and propose a correction method using known source to solve the problem of phase uncertainty of sensor array. Finally, Matlab is used to prove the feasibility of the direction finding algorithm of three circular antennas array and its correction method. The simulation results show the algorithm is effective and it can meet the requirements of accuracy. When working at the circumstance of single signal source, the methods we proposed is very simple and fast to implement compared to other algorithms, such as the MUSIC and the ESPRIT, though the accuracy is not better than them. And it can be used at real-time signal processing system easily, which is difficult for MUSIC and ESPRIT.

关键词： signal processing phase interfermeter direction-finding amplitude phase inconsistency

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Lower bounds for non standard deterministic estimation

Lower bounds for non standard deterministic estimation

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2016 ieee sensor array and multichannel signal processing workshop, SAM 2016

作者： Galy, Jerome Chaumette, Eric Vincent, Francois Renaux, Alexandre Larzabal, Pascal Université de Montpellier 2 Montpellier France ISAE-SUPAERO Universite de Toulouse Toulouse Cedex 431055 France Université Paris-Sud/LSS 3 Rue Joliot-Curie Gif-sur-Yvette France Université Paris-Sud/SATIE 61 av. du President Wilson Cachan France

ISBN: (纸本)9781509021031

In this paper, non standard deterministic parameters estimation is considered, i.e. the situation where the probability density function (p.d.f.) parameterized by unknown deterministic parameters results from the marginalization of a joint p.d.f. depending on additional random variables. Unfortunately, in the general case, this marginalization is mathematically intractable, which prevents from using the known deterministic lower bounds on the mean-squared-error (MSE). However an embedding mechanism allows to transpose all the known lowers bounds into modified lower bounds fitted with non-standard deterministic estimation, encompassing the modified Cramér-Rao / Bhattacharyya bounds and hybrid lower bounds. © 2016 ieee.

关键词： Mean square error

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A recursive model for partially correlated χ2 targets

A recursive model for partially correlated χ2 targets

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2010 ieee sensor array and multichannel signal processing workshop, SAM 2010

作者： Ephrath, Abner Haifa Israel

ISBN: (纸本)9781424489770

This work considers the problem of χ2 target detection in normal (Gaussian) noise. The single pulse power, and target RCS, are χ2 distributed with an arbitrary form factor k. The correlation between pulses is determined by target dynamics, according to a simple rule of thumb. The sequence of target pulses is constructed using a recursive model of Markov chain, and the value of the correlation coefficient is derived. An approximation of 'strict sense χ2' is assumed for the probability density function (p.d.f) of the sum of the integrated pulses. The form factor K of this density is calculated in terms of the correlation coefficient, number of integrated pulses and the form factor for the single pulse p.d.f - k. By determination of the normalized threshold for the given Pfa (probability of false alarm), the probability of detection - Pd can be obtained. One way to do these calculations is using the "universal detection equation" suggested by D.K. Barton (7.2005). The model can be used in radar system performance analysis and in simulations. The advantage of these methods is the elimination of the use of tables and graphs, and enabling direct computations such as in multiple situation simulations. It can be done using commercially available advanced mathematical software. © 2010 ieee.

关键词： Probability density function

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Underwater target localization based on DOAs of sensor array network

Underwater target localization based on DOAs of sensor array...

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2010 2nd International Conference on signal processing Systems, ICSPS 2010

作者： Biao, Wang Guang, Yang Zhibing, Xie Weibo, Zhong College of Electronic Information Jiangsu University of Science and Technology Zhenjiang China College of Engineering Ocean University of China Qingdao China

ISBN: (纸本)9781424468911

The underwater target localization problem is one important application for underwater acoustic sensor networks. A novel passive source location algorithm for underwater acoustic sensor networks is proposed, which is suitable to both two-dimensional and three-dimensional networks. The proposed algorithm firstly studies the precision of directional of arrival (DOA) for underwater acoustic sensor array and applies it to set up the statistic model of target localization based on DOAs. According to the model, the maximum likelihood (ML) method is used to estimate the target Location based on DOAs by sensor array nodes. Lastly, the result of simulation has shown the application validity and studied the precision performance of the algorithm. © 2010 ieee.

关键词： Maximum likelihood

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Order-controlled multiple shift SBR2 algorithm for para-Hermitian polynomial matrices

Order-controlled multiple shift SBR2 algorithm for para-Herm...

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2016 ieee sensor array and multichannel signal processing workshop, SAM 2016

作者： Wang, Zeliang McWhirter, John G. Corr, Jamie Weiss, Stephan School of Engineering Cardiff University Cardiff United Kingdom Department of Electronic and Electrical Engineering University of Strathclyde Glasgow United Kingdom

ISBN: (纸本)9781509021031

In this work we present a new method of controlling the order growth of polynomial matrices in the multiple shift second order sequential best rotation (MS-SBR2) algorithm which has been recently proposed by the authors for calculating the polynomial matrix eigenvalue decomposition (PEVD) for para-Hermitian matrices. In effect, the proposed method introduces a new elementary delay strategy which keeps all the row (column) shifts in the same direction throughout each iteration, which therefore gives us the flexibility to control the polynomial order growth by selecting shifts that ensure non-zero coefficients are kept closer to the zero-lag plane. Simulation results confirm that further order reductions of polynomial matrices can be achieved by using this direction-fixed delay strategy for the MS-SBR2 algorithm. © 2016 ieee.

关键词： Eigenvalues and eigenfunctions

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Inherent signal preprocessing in the line CCD sensor 2

Inherent signal preprocessing in the line CCD sensor

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2nd ieee International workshop on Intelligent Data Acquisition and Advanced Computing Systems

作者： Kejzar, L Fischer, J Czech Tech Univ Fac Elect Engn Dept Measurement Prague 16627 6 Czech Republic

ISBN: (纸本)0780381386

The paper. is devoted to the description and practical verification of a new CCD linear image sensor control method. This method is used for inherent signal preprocessing or processing in the CCD linear image sensor. This new method is suitable for a movement compensation, an one-frame filtration or a two-frame filtration. Because of the similarity between the Non-Recursive Digital Filter with Finite Impulse Response (NRDF FIR) and the new mode it was named FIR mode. Conclusions and hints applicable for operation of CCD image sensor in FIR mode are also included in the paper.

关键词： CCD signal processing FIR filter

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Fractionally-spaced array processing for fast fading cellular TDMA signals using cyclic higher-order cumulants 2

Fractionally-spaced array processing for fast fading cellula...

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2nd ieee workshop on signal processing Advances in Wireless Communications, SPAWC 1999

作者： Max Martonet, Massimiliano Watkins-Johnson Co. GaithersburgMD United States

ISBN: (纸本)0780355997

A new approach to cochannel interference rejection in frequency selective fading using an antenna array is presented. The fundamental idea is to exploit the higher-order cyclostationarity of the digitally modulated signals received at the antenna array. The problem of minimizing the noise-free time averaged mean squared error is shown to be equivalent to the problem of minimizing a cost function involving space-time contractions of fourth-order cyclic cumulants. The method is effective in fast fading environments such as those specified in IS-136, the US digital TDMA cellular standard. Results of computer simulations and hardware experiments are presented. © 1999 ieee.

关键词： Antenna arrays

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Mining mobile sensor data for social behaviors 2

Mining mobile sensor data for social behaviors

引用

2nd International workshop on Social Sensing, SocialSens 2017

作者： Li, Huan Gou, Yuanjie School of CS and Eng. Beihang University Beijing100191 China

ISBN: (纸本)9781450349772

sensor devices widely used on vehicles enable the massive data collection for social behavior analysis. We mined trajectory data and on-board sensor data for point-of-interest (POI) locations, which further indicate public and personal social properties. We propose a method to rank the significance of the POIs that represent those social behaviors. © 2017 ACM.

关键词： Data mining

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Magnetic imaging of ferromagnetic shape with Mobile Hall sensor array system

Magnetic imaging of ferromagnetic shape with Mobile Hall Sen...

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2011 2nd ieee International Conference on signal and Image processing Applications, ICSIPA 2011

作者： Norhisam, M. Shin, N. Wei Marhaban, M. Hamiruce Suhaidi, S. Department of Electrical and Electronics Engineering University Putra Malaysia 43400 Selangor Malaysia

ISBN: (纸本)9781457702419

The Mobile Hall sensor array system is a dynamic moving device capable of ferromagnetic shape evaluation based on the magnetic flux leakage testing principle. The device consists of a linearly integrated 1-D Hall sensor array to detect magnetic field changes on a ferromagnetic shape under evaluation. The signal processing application software residing on a computer is developed for the Hall sensor array signals processing which leads to the magnetic image construction of magnetized ferromagnetic shape. This paper presents the principle of operation for Mobile Hall sensor array System in the shape detection of ferromagnetic materials. In addition, the signals array processing algorithm implemented in Hall sensor signals array processing application software is presented. The experimental results illustrated the magnetic image of specimens SS400 mild steel of various shape e.g square, round and triangle. The results proved the ability of Mobile Hall sensor array system to perform shape evaluation on ferromagnetic materials. © 2011 ieee.

关键词： Ferromagnetic materials

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Maximum likelihood array processing: The semi-blind case 2

Maximum likelihood array processing: The semi-blind case

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2nd ieee workshop on signal processing Advances in Wireless Communications, SPAWC 1999

作者： Kozick, Richard J. Sadle, Brian M. Electrical Engineering Department Bucknell University LewisburgPA17837 United States Army Research Laboratory AMSRL IS TA 2800 Powder Mill Road AdelphiMD20783 United States

ISBN: (纸本)0780355997

Protocols for digital wireless communication systems generally contain known bit sequences that are transmitted periodically for the purposes of training and/or synchronization. We study the performance improvement that is obtained in antenna array processing when knowledge of the signal waveforms is exploited. Our model is formulated such that the signals from multiple sources are known for a subset of the data samples and unknown for the remainder of the samples. Maximum likelihood (ML) estimates of the signal parameters are derived for this model, and the Cramer-Rao bound (CRB) on the accuracy of source location estimates is presented. Numerical evaluations of the CRB are included to illustrate the performance when partial training data is available in one or more of the sources. © 1999 ieee.

关键词： array processing

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