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Multi-Valued Eigen-Processing for Isolating Multiple Sources With a rectangular array

IEEE ACCESS 2021年 9卷 8990-8996页

作者： Collins, Michael D. Lingevitch, Joseph F. US Naval Res Lab Washington DC 20375 USA

The multi-valued Bartlett (MVB) processor is useful for determining the locations of multiple acoustic sources in the ocean [J. Acoust. Soc. Am. 97, 235-241 (1995)]. This approach was originally applied to a vertical line array of hydrophones. The application to a rectangular array is explored here. The MVB processor is an eigen-processor that is based on the eigenvectors of the covariance matrix. It is multi-valued in the sense that an ambiguity surface is constructed for each member of a subset of the eigenvectors that correspond to the largest eigenvalues. The motivation for the approach is the fact that energy from different sources tends to partition into different eigenvectors. One of the advantages of the MVB processor on a rectangular array is that it is possible to determine if the partitioning is favorable without computing replica fields, which is often the most time-consuming task of matched-field processing computations. Examples are presented to illustrate the capabilities and limitations of the approach.

关键词： Ocean acoustics matched-field processing beamforming eigen-processing source localization replica fields multi-valued Bartlett processor rectangular array

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Efficiency of projected score methods in rectangular array asymptotics

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JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-STATISTICAL METHODOLOGY 2003年第1期65卷 191-208页

作者： Li, HH Linsday, BG Waterman, RP Frontier Sci & Technol Res Fdn Inc Chestnut Hill MA 02467 USA Penn State Univ University Pk PA 16802 USA Univ Penn Philadelphia PA 19104 USA

The paper considers a rectangular array asymptotic embedding for multistratum data sets, in which both the number of strata and the number of within-stratum replications increase, and at the same rate. It is shown that under this embedding the maximum likelihood estimator is consistent but not efficient owing to a non-zero mean in its asymptotic normal distribution. By using a projection operator on the score function, an adjusted maximum likelihood estimator can be obtained that is asymptotically unbiased and has a variance that attains the Cramer-Rao lower bound. The adjusted maximum likelihood estimator can be viewed as an approximation to the conditional maximum likelihood estimator.

关键词： asymptotic theory Neyman-Scott problem nuisance parameters projected score rectangular array

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DOA and velocity estimation of moving sources using rectangular array and local approximation

DOA and velocity estimation of moving sources using rectangu...

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International Conference on Wireless Networks

作者： Montlouis, W Shafai, B Northeastern Univ Dept Elect & Comp Engn Boston MA 02115 USA

ISBN: (纸本)1932415033

When receiving waves at constant or small elevation angle, rectangular array of sensors are considered as very efficient beamforming networks in wireless communications. This rectangular array structure has an important advantage over linear structure as to the resolution of angle of arrival estimation. This high resolution characteristic is essentially the same in all directions and the beamwidth is adjustable in a very simple manner. In addition, the number of antenna elements which are used for beamforming can be selected according to the angle of arrival, which reduces the complexity of the system by reducing the number of weight calculations. In this paper we present a local approximation method to localize and to track moving sources using rectangular array.

关键词： rectangular array direction of arrival velocity estimation wireless communications local approximation

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A Cascade AOA Estimation Technique with rectangular array Antenna

A Cascade AOA Estimation Technique with Rectangular Array An...

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International Symposium on Antennas and Propagation (ISAP)

作者： Kim, Tae yun Mun, Ji youn Hwang, Suk-seung Chosun Univ Elect Engn 309 Pilmun Daero Dongu Gwangju South Korea

ISBN: (纸本)9788957083048

In order to efficiently estimate the angle of arrival (AOA) information from the closely located signal sources, in this paper, we introduce a cascade AOA estimation technique based on the CAPON and beamspace Multiple Signal Classification (MUSIC) algorithms. First, the cascade approach estimates AOA groups consisting of multiple AOAs using CAPON, and then estimates the individual AOA in the AOA group using beamspace MUSIC. In this paper, we employ the rectangular array anttena for the cascade algorithm.

关键词： CAPON Beamspace MUSIC AOA Estimation rectangular array Cascade

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IMPLEMENTATION OF A WIDEBAND BEAMFORMER BASED ON A rectangular array WITH SPATIAL-ONLY INFORMATION

IMPLEMENTATION OF A WIDEBAND BEAMFORMER BASED ON A RECTANGUL...

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European Signal Processing Conference

作者： Wei Liu Communications Research Group Department of Electronic and Electrical Engineering University of Sheffield

The response of a wideband beamformer based on a rectangular array with spatial-only information is studied. In this beamformer, each of the received array signals is only processed by one single coefficient and its output is an instantaneous weighted combination of the received signals. One interesting property of it is that it has a totally different beam response depending on whether we are considering the negative frequency component or the positive frequency component of the impinging signals. As a result, the implementation of this beamformer is not as straightforward as the traditional ones and a special arrangement is required for its effective operation. Two implementation schemes are proposed for complex-valued impinging signals and real-valued impinging signals, respectively, supported by design and simulation results.

关键词： Wideband beamforming rectangular arrays Sensor delay-lines Implementation broadband rectangular array information signals received signal beamformers arrays negative frequency

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A Cascade AOA Estimation Technique with rectangular array Antenna

A Cascade AOA Estimation Technique with Rectangular Array An...

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International Symposium on Antennas and Propagation

作者： Tae yun Kim Ji youn Mun Suk-seung Hwang Electronic Engineering Chosun University Gwangiu 309 Pilmun-daero Dongu Republic of Korea

ISBN: (纸本)9781538653890;9788957083048

关键词： CAPON Beamspace MUSIC AOA estimation rectangular array Cascade

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Bounds of mmWave-Based Ranging and Positioning with Massive Uniform rectangular array

Bounds of mmWave-Based Ranging and Positioning with Massive ...

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IEEE Canadian Conference on Electrical and Computer Engineering

作者： Donglin Wang Michel Fattouche Fadhel M. Ghannouchi Westlake Institute for Advanced Study Institute of Advanced Technology Hangzhou 310024 China ECE Dept. University of Calgary Calgary T2N 1N4 Canada ECE Dept. University of Calgary The iRadio Lab Calgary T2N 1N4 Canada

ISBN: (纸本)9781538624111

This paper aims at investigating the feasibility of ranging and positioning in millimeter (mm)-level accuracy by adopting millimeter-wave and 3D massive antenna array. The agent is equipped with massive phased uniform rectangular array (URA) and multiple anchors are considered in localization networks to pursue a higher accuracy, where a far-field environment is assumed for phased massive URA. Fundamental limits of both time-based ranging and positioning are derived by Cramer-Rao bound (CRB), where the relationship between the fundamental bound of range estimation and that of position estimation is theoretically clarified. Numerical results show that the proposed scenario achieves a precise mm-level accuracy for ranging and positioning.

关键词： Patient Positioning distance measurement rectangular array position estimation complementary return to bias far-field Agents Bound Uniform Uniforms

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Performance Analysis of New Variable Loading based Robust rectangular Antenna array Beamformer 5

Performance Analysis of New Variable Loading based Robust Re...

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5th International Conference on Advances in Electrical Engineering (ICAEE)

作者： Rashid, M. M. Hossain, M. S. Reza, M. F. Rajshahi Univ Engn & Technol Dept Elect & Elect Engn Rajshahi 6204 Bangladesh

ISBN: (纸本)9781728149349

This paper describes the performance of robust rectangular antenna array beamformer using new variable loading technique against steering vector error. Steering vector error is an important factor for practical implementation of the beamformer and the outcome of the paper shows that the robust beamformer performs well at erroneous and error free condition. rectangular array is essential for the modern space limited situation where the array can scan around 360 degrees and required less space for array elements positioning. The result of the technique is compared with other published loading technique applied to rectangular array.

关键词： rectangular array new variable loading robust SINR Signal strength beam pattern

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Sparse rectangular and Spiral array Designs for 3D Medical Ultrasound Imaging

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SENSORS 2020年第1期20卷 173-173页

作者： Yoon, Hansol Song, Tai-Kyong Sogang Univ Dept Elect Engn Seoul 04107 South Korea

In three-dimensional (3D) medical ultrasound imaging with two-dimensional (2D) arrays, sparse 2D arrays have been studied to reduce the number of active channels. Among them, sparse 2D arrays with regular or uniform arrangements of elements have advantages of low side lobe energy and uniform field responses over the entire field of view. This paper presents two uniform sparse array models: sparse rectangular arrays (SRAs) on a rectangular grid and sparse spiral arrays (SSAs) on a sunflower grid. Both arrays can be easily implemented on the commercially available or the custom-made arrays. To suppress the overall grating lobe levels, the transmit (Tx) and receive (Rx) array pairs of both the array models are designed not to have grating lobes at the same locations in the Tx/Rx beam patterns, for which the theoretical design rules are also proposed. Computer simulation results indicate that the proposed array pairs for both the SRAs and the SSAs achieve peak grating lobe levels below -40 dB using about a quarter of the number of elements in the dense rectangular array while maintaining similar beam widths to that of the dense array pair.

关键词： sparse 2D array 3D ultrasound imaging rectangular array spiral array sunflower array grating lobe suppression array signal processing

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Blind Joint Angle and Frequency Estimation Based on Uniform rectangular Acoustic Vector Sensor array

Blind Joint Angle and Frequency Estimation Based on Uniform ...

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10th International Conference on Natural Computation (ICNC)

作者： Xulingyun Zengxianwei Zhangguangbin Nanjing Univ Aeronaut & Astronaut Coll Sci Nanjing Jiangsu Peoples R China Nanjing Telecom Technol Res Inst Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781479951512

A novel algorithm has been proposed for joint angle and frequency estimation based on uniform rectangular acoustic vector sensors array. The joint angle and frequency problem is linked to a parafac quadrilinear model. Exploiting this link, it drives a quadrilinaear decomposition-based joint angle and frequency algorithm. This proposed algorithm has improved angle and frequency estimation compared to ESPRIT method and parafac trilinear decomposition method. Simulation results illustrate performance of this algorithm.

关键词： joint angle-frequency estimation acoustic vector sensors rectangular array quadrilinear decomposition

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