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Practical sub-Nyquist sampling via array-based compressed sensing receiver architecture

Practical sub-Nyquist sampling via array-based compressed se...

引用

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

作者： Bolstad, Andrew K. Vian, James E. Chisum, Jonathan D. Suh, Youngho MIT Lincoln Laboratory LexingtonMA02420-9108 United States Department of Electrical Engineering University of Notre Dame South BendIN46556 United States

ISBN: (纸本)9781509021031

This paper introduces the array-based Compressed sensing Receiver Architecture (ACRA). ACRA allows digital receiver arrays to operate at dramatically larger instantaneous bandwidths by sampling the signals from different array elements at different sub-Nyquist sampling rates. signal processing inspired by the sparse fast Fourier transform allows for signal detection, estimation, and angle-of-arrival determination. Simulation results and measurements from an 18-45 GHz testbed are presented. © 2016 ieee.

关键词： Compressed sensing

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Experiments in radio location estimation using an airbone array

Experiments in radio location estimation using an airbone ar...

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SAM 2008 - 5th ieee sensor array and multichannel signal processing workshop

作者： Tsuji, Hiroyuki Zheng, Jimeng Kaveh, Mostafa Yokosuka Japan Department of Electrical and Computer Engineering University of Minnesota Minneapolis MN United States

ISBN: (纸本)9781424422418

The problem of interest is the determination of the location of a licensed or unlicensed source of radio transmission from air. Accordingly, an experiment was conducted in 2008 involving a two-dimensional antenna array mounted on a Zeppelin NT airship. This paper gives an overview of the experiment and some results obtained to date by post-processing of the collected data. A combination of angles of arrival estimation of radio sources and the proposed attitude correction technique gives an accurate location estimation of a radio source located in an urban area. We also verified the feasibility of localization system using on-board array antennas through the experiment. © 2008 ieee.

关键词： Radio transmission

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array of sensors: A spatiotemporal-state-space model for target trajectory tracking

Array of sensors: A spatiotemporal-state-space model for tar...

引用

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

作者： Manikas, A. Sridhar, V. Kamil, Y.I.

ISBN: (纸本)9781509021031

In this paper, with the objective of tracking the trajectory of multiple mobile targets, a novel spatiotemporal-state-space model is introduced for an array of sensors distributed in space. Under the wideband assumption, the proposed model incorporates the array geometry in conjunction with crucial target parameters namely (i) ranges, (ii) directions, (iii) velocities and (iv) associated Doppler effects. Computer simulation studies show some representative examples where the proposed model is utilised to track the locations of sources in space with a very high accuracy. © 2016 ieee.

关键词： Wave propagation

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Electromagnetic sensor array for train wheel detection

Electromagnetic sensor array for train wheel detection

引用

2004 sensor array and multichannel signal processing workshop

作者： Donato, Patricio G. Ureña, Jesus Mazo, Manuel García, Juan Jesús Álvarez, Fernando Department of Electronics University of Alcalá Alcalá de Henares 28871 Spain Dept. of Electronics and Electromechanical Eng. University of Extremadura Cáceres 10071 Spain

ISBN: (纸本)0780385454

This work proposes a train wheel detection system based on an electromagnetic sensor array. This sensor array is distributed in points along a section of the railway. Each sensor of the array is located next to the rail without additional electronics in this place. All the electronic signal process equipment is concentrated at a place far away the rail. To compensate the attenuation in the wires and the external noise, it is proposed to use a signal coded with Golay sequences. Combining the properties of the Golay sequences with the characteristics of the proposed sensor array, it is possible to detect the passage of the train by scattered points, and also to recognize the sense of circulation and estimate the speed of the train. © 2004 ieee.

关键词： sensors

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Nonlinear mobile sensor calibration using informed semi-nonnegative matrix factorization with a Vandermonde factor

Nonlinear mobile sensor calibration using informed semi-nonn...

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

作者： Dorffer, Clement Puigt, Matthieu Delmaire, Gilles Roussel, Gilles Univ. Littoral Cote d'Opale EA 4491 LISIC CalaisF-62228 France

ISBN: (纸本)9781509021031

In this paper we aim to blindly calibrate a mobile sensor network whose sensor outputs and the sensed phenomenon are linked by a polynomial relationship. The proposed approach is based on a novel informed semi-nonnegative matrix factorization with a Vandermonde factor matrix. The proposed approach outperforms a matrix-completion-based method in a crowdsensing-like simulation of particulate matter sensing. © 2016 ieee.

关键词： Matrix factorization

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Incremental multiple error filtered-X LMS for node-specific active noise control over wireless acoustic sensor networks

Incremental multiple error filtered-X LMS for node-specific ...

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

作者： Plata-Chaves, Jorge Bertrand, Alexander Moonen, Marc KU Leuven Electrical Engineering Dept. ESAT-STADIUS Kasteelpark Arenberg 10 Leuven3001 Belgium

ISBN: (纸本)9781509021031

We propose an adaptive distributed algorithm to solve a node-specific Active Noise Control (ANC) problem. In this novel ANC problem, the nodes estimate different but overlapping ANC filters in order to generate secondary signals that cancel a primary noise source as it impinges on their microphones. Different sets of nodes follow a cyclic mode of cooperation in order to implement several coupled Multiple Error Filtered-X Least Mean Squares algorithms, each responsible for the estimation of part of the different node-specific ANC filters. The proposed algorithm outperforms the non-cooperative strategies and achieves the same steady-state noise reduction as a centralized solution that processes all the signals in the network. Finally, computer simulations are provided to illustrate the effectiveness of the proposed algorithm. © 2016 ieee.

关键词： Active noise control

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Estimating the performance of a superdirective microphone array with a frequency-invariant response

Estimating the performance of a superdirective microphone ar...

引用

ieee sensor array and multichannel signal processing workshop

作者： Traverso, Federico Crocco, Marco Trucco, Andrea Department of Biophysical and Electronic Engineering University of Genoa Italy

ISBN: (纸本)9781424489770

The knowledge of the impact of sensors tolerances in the beamformer performance is of crucial importance in many design cases, especially when superdirective arrays are employed. The availability of the array characteristics (i.e. perturbations on sensors responses and elements displacement), allows to obtain an expectation of the system capabilities corrupted by realistic imperfections. In this paper we discuss the effectiveness of the expected beam pattern as an a priori criterion for the beam-former performance estimation. In particular, the expected beam power pattern has been compared to the actual one, resulted from an experimental investigation of a super-directive microphone array. The tight adherence between the two beam shapes accounts for the effectiveness of the proposed tool in driving the system design. © 2010 ieee.

关键词： Microphone array

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Sensitivity of music and root-music to gain calibration errors of 2D arbitrary array configuration

Sensitivity of music and root-music to gain calibration erro...

引用

2004 sensor array and multichannel signal processing workshop

作者： Nemirovsky, Shira Doron, Miriam A. RAFAEL Dept. 23 P.O.B. 2250 Haifa 31021 Israel

ISBN: (纸本)0780385454

Wavefield Modeling is a formalism for array processing based on expressing the output of a sensors' array as a product of a wavefieId-independent sampling matrix and an array-independent coefficient vector. This approach turns out to be very useful in practical algorithms for array processing and direction finding, such as the MUSIC and Root-MUSIC algorithms;specifically, it yields an extension of the MUSIC and Root-MUSIC algorithms to general 2D arrays. A numerical study of those two direction finding methods in the case of closely-spaced radiatng sources, shows that the resolution capability of Root-MUSIC is less sensitive than MUSIC to calibration errors in the sensors' gains. ©2004 ieee.

关键词： Computer music

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A computationally efficient blind estimator of polynomial phase signals observed by a sensor array

A computationally efficient blind estimator of polynomial ph...

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ieee sensor array and multichannel signal processing workshop

作者： Amar, Alon Leshem, Amir Van Der Veen, Alle-Jan EEMSC Faculty Delft University of Technology Delft 2628 CD Netherlands School of Engineering Bar Ilan University Ramat Gan 52900 Israel

ISBN: (纸本)9781424489770

Consider estimating the parameters of polynomial phase signals observed by an antenna array given that the array manifold is unknown (e.g., uncalibrated array). To date, only an approximated maximum likelihood estimator (AMLE) was suggested, however, it involves a multidimensional search over the entire coefficient space. Instead, we propose a two-step estimation approach, termed as SEparate- EStimate (SEES): First, the signals are separated with a blind source separation technique by exploiting the constant modulus property;Then, the coefficients of each polynomial are estimated using a least squares method from the unwrapped phase of the estimated signal. This estimator does not involve any search in the coefficient spaces and its computational complexity increases linearly with respect to the polynomial order, whereas that of the AMLE increases exponentially. Simulations show that the proposed estimator achieves the Cramér-Rao lower bound (CRLB) at moderate or high signal to noise ratio (SNR). © 2010 ieee.

关键词： Antenna arrays

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Synthetic aperture imaging with thinned linear sensor arrays for medical ultrasound

Synthetic aperture imaging with thinned linear sensor arrays...

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

作者： Ramirez, Juan Bottenus, Nick Trahey, Gregg Krolik, Jeffrey L. Department of Electrical and Computer Engineering Duke University DurhamNC27708 United States Department of Biomedical Engineering Duke University DurhamNC27708 United States

ISBN: (纸本)9781509021031

In this paper, we exploit motion for improving the ultrasound (US) imaging performance of thinned sensor array systems. Thinned arrays provide reduced system cost and allows for the reduction of bulky channel cables. However, thinned array systems suffer from poor array processing performance from the lack of channels available to the system when compared to a Uniform Linear array (ULA). To overcome these deficiencies we propose to use motion to augment the transmit/receive events such that a general thinned array can be made to perform statistically equivalently to a ULA. The key feature of this work is that the statistical equivalence does not depend on realizing all missing sensors, instead the equivalence is at the level of the sum co-array. We show simulation results that demonstrate the system equivalence of thinned arrays with about one-third of the active sensors compared to a ULA of equal aperture. © 2016 ieee.

关键词： array processing

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