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检索条件"任意字段=2008 IEEE Sensor Array and Multichannel Signal Processing Workshop"

共 1267 条记录，以下是121-130 订阅

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DoA and polarization estimation using arbitrary polarimetric array configurations

DoA and polarization estimation using arbitrary polarimetric...

引用

4th ieee sensor array and multichannel signal processing workshop

作者： Richter, Andreas Belloni, Fabio Koivunen, Visa Aalto Univ Signal Proc Lab SMARAD CoE POB 3000 FIN-02015 Helsinki Finland

ISBN: (纸本)1424403081

In this paper we propose an algorithm for angle and polarization estimation of non-coherent sources using real-world polarimetric antenna arrays. In order to construct an accurate model of an antenna array, we exploit its Effective Aperture Distribution Function (EADF). This model contains information on the array response for a vertical and horizontal excitation, the directional characteristic of each element, and array imperfections. Here, we propose a method stemming from the RARE (RAnk-Reduction Estimator) algorithm. It performs fast (search-free) DoAs and polarization coefficients estimation. Throughout simulation results, we verify that the algorithm has close to optimal statistical performance with polarimetric real-world arrays. We present the statistical performance for three different array configurations.

关键词： Direction of arrival

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Low-rank decomposition of multi-way arrays: A signal processing perspective

Low-rank decomposition of multi-way arrays: A signal process...

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3rd ieee sensor array and multichannel signal processing workshop

作者： Sidiropoulos, ND Tech Univ Crete Dept ECE Khania 73100 Crete Greece

ISBN: (纸本)0780385454

In many signal processing applications of linear algebra tools, the signal part of a postulated model lies in a so-called signal sub-space, while the parameters of interest are in one-to-one correspondence with a certain basis of this subspace. The signal subspace can often be reliably estimated from measured data, but the particular basis of interest cannot be identified without additional problem-specific structure. This is a manifestation of rotational indeterminacy, i.e., non-Uniqueness of low-rank matrix decomposition. The situation is very different for three- or higher-way arrays, i.e., arrays indexed by three or more independent variables, for which low-rank decomposition is unique under mild conditions. This has fundamental implications for DSP problems which deal with such data. This paper provides a brief tour of the basic elements of this theory, along with many examples of application in problems of current interest in the signal processing community.

关键词： three-way analysis low-rank decomposition parallel factor analysis (PARAFAC) canonical decomposition (CAN-DECOMP)

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Improved array self calibration with large sensor position errors for closely spaced sources

Improved array self calibration with large sensor position e...

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1st ieee sensor array and multichannel signal processing workshop (SAM 2000)

作者： Flanagan, BP Bell, KL Mitre Corp Reston VA 20190 USA

ISBN: (纸本)0780363396

Self-calibration algorithms estimate both source directions-of-arrival (DOAs) and perturbed array response vector parameters, such as sensor locations. Calibration errors are usually assumed to be small and a first order approximation to the perturbed array response vector is often used to simplify the estimation procedure. ln this paper, we improve on a previously presented technique that eliminates the small error assumption. The improved technique has better performance for closely spaced sources for both small and large calibration errors.

关键词： array signal processing Calibration Covariance matrix Direction of arrival estimation Matrix decomposition Multiple signal classification Mutual coupling Phased arrays sensor arrays sensor phenomena and characterization

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Performance of DCMP adaptive array utilizing aggregated microphones

Performance of DCMP adaptive array utilizing aggregated micr...

引用

4th ieee sensor array and multichannel signal processing workshop

作者： Matsumoto, M. Hashimoto, S. Waseda Univ Dept Appl Phys Shinjuku Ku 55N-4F-10A3-4-1 Okubo Tokyo Japan

ISBN: (纸本)1424403081

Recently, the authors proposed a miniaturized microphone array not utilizing the phase difference but utilizing the directivity of each microphone, namely aggregated microphones. We have already showed that the phased microphone array and the aggregated microphones can be described within the same framework. We have also showed that it is possible to apply the aggregated microphones to the various methods of the phased microphone array. However, the difference of the performance between the phased array and the aggregated microphones has not been evaluated yet. The effect of the directivity and the posture of each microphone on the performance of the aggregated microphones has not also been evaluated yet. In this paper, we evaluate the performance of DCMP (Directionally Constrained Minimization of Power) adaptive array utilizing aggregated microphones.

关键词： Microphones

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Threshold optimization for distributed detection using particle filtering methods

Threshold optimization for distributed detection using parti...

引用

4th ieee sensor array and multichannel signal processing workshop

作者： Kyriakides, I. Cochran, D. Arizona State Univ Dept Elect Engn Tempe AZ 85287 USA

ISBN: (纸本)1424403081

Local processing on the nodes of a distributed sensing and processing system has the benefits of reducing the data volume transferred from the nodes to the fusion center, reducing both transmission power requirements and the computational burden on the fusion center. The individual nodes obtain measurements from the environment and transmit a quantized detection statistic to the fusion center. Quantization threshold levels need to be found for each sensor that maximize the performance of the system. We propose a global optimization method, the particle filtering optimization method, that uses particle filtering to propagate the values of the thresholds of a distributed detection system to sensor threshold values that are optimal with respect to some measure of system performance. We demonstrate, through simulations, the effectiveness of the particle filtering optimization method in finding the threshold of each of the sensors used in detection scenario.

关键词： sensor arrays

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One-side Extended Nested array for Degree of Freedom Enhancement 11

One-side Extended Nested Array for Degree of Freedom Enhance...

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ieee 11th sensor array and multichannel signal processing workshop (SAM)

作者： Ren, Shiwei Dong, Wentao Li, Xiangnan Yan, Su Wu, Haixia Wang, Weijiang Beijing Inst Technol Dept Signal & Elect Beijing Peoples R China

ISBN: (纸本)9781728119465

In this paper, an extended nested array strategy is proposed for degree of freedom (DOF) enhancement. Based on the augmented nested array (ANA), with the inter-element spacings in the side subarray increased, the strategy provides the possibility to acquire higher number of DOF than the existing nested-like arrays, such as the nested array, ANA, improved nested array and the maximum inter-element spacing constraint array. The one-side extended nested array (OS-ENA) is specifically proposed based on the ENA strategy, which can successfully avoid the holes brought by the sparse distribution of sensors and increase the DOF. The analytical expressions of sensor locations and DOF are derived. Simulations of the direction-of-arrival estimation verify the superiorities of the proposed OS-ENA with the spacial smoothing MUSIC algorithm used.

关键词： DOA estimation Degree of freedom Sparse nested array

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Distributed Detection and Imaging in MIMO Radar Network Based on Averaging Consensus 10

Distributed Detection and Imaging in MIMO Radar Network Base...

引用

10th ieee sensor array and multichannel signal processing workshop (SAM)

作者： Zabolotsky, Anton A. Mavrychev, Evgeny A. Nizhnii Novgorod State Tech Univ Dept Informat Radio Syst 24 Minin St Nizhnii Novgorod Russia

ISBN: (纸本)9781538647523

In this paper, we consider distributed signal processing in a MIMO radar network. We suppose that transmitting and receiving nodes of MIMO radar are distributed in a large-scale area. In this network the neighboring receiving nodes communicate with each other to exchange data. A fully distributed algorithm for detection and imaging is proposed. This algorithm is based on the averaging consensus approach. The effectiveness of the proposed technique is confirmed by numerical examples. It is compared to the centralized solution in a fusion center, the local solution in an individual receiving node and the proposed distributed algorithm.

关键词： MIMO radar network distributed signal processing averaging consensus algorithm

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2-D sensor position perturbation analysis: Equivalence to AWGN on array outputs

2-D sensor position perturbation analysis: Equivalence to AW...

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2nd ieee sensor array and multichannel signal processing workshop

作者： Cevher, V McClellan, JH Georgia Inst Technol Atlanta GA 30332 USA

ISBN: (纸本)0780375513

In this paper, the performance of a subspace beamformer, namely the multiple signal classification algorithm (MUSIC), is scrutinized in the presence of sensor position errors. Based on a perturbation model, a relationship between the array autocorrelation matrix and the source autocorrelation matrix is established. It is shown that under certain assumptions on the source signals, the Gaussian sensor perturbation errors can be modelled as additive white Gaussian noise (AWGN) for an array where sensor positions are known perfectly. This correspondence can be used to equate position errors to an equivalent signal-to-noise ratio (SNR) for AWGN in performance evaluation. Finally, Cramer-Rao bound for the position perturbations that can be computed using the Cramer-Rao bound relations for the additive Gaussian noise case at high SNR's.

关键词： signal to noise ratio

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Random Switch Antenna array FMCW Radar and Its signal processing Method

Random Switch Antenna Array FMCW Radar and Its Signal Proces...

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ieee 7th sensor array and multichannel signal processing workshop (SAM)

作者： Hu, Chenxi Meng, Huadong Wang, Wei Li, Gang Wang, Xiqin Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China Xian Elect Engn Res Inst Xian Peoples R China

ISBN: (纸本)9781467310710

In this paper, random switch antenna array (RSAA) is proposed to apply to the switch antenna array (SAA) frequency-modulated continuous-wave (FMCW) radar system. Firstly, the signal model and signal processing method of RSAA is analyzed and it shows that RSAA can successfully solve azimuth-velocity coupling problem. Then we suppose a method by using RSAA to reduce the switching frequency and sampling rate based on sparse signal representation with multiple measurement vectors (MMV). It is shown in simulations that the proposed algorithms yield better performance in terms of azimuth-velocity decoupling and can obtain high image accuracy with less observation data.

关键词： FMCW Radar Time-division multiplexing antenna array RSAA Azimuth-velocity coupling M-FOCUSS

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Indoor localization using subspace matching: An experimental evaluation

Indoor localization using subspace matching: An experimental...

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4th ieee sensor array and multichannel signal processing workshop

作者： Tsuji, Hiroyuki Kikuchi, Shohei Kaveh, Mostafa Natl Inst Informat & Commun Technol 3-4Hikarino Oka Yokosuka Kanagawa 2390847 Japan Keio Univ Sch Integrated Design Engn Yokohama Kanagawa 2238522 Japan Univ Minnesota Minneapolis MN 55455 USA

ISBN: (纸本)1424403081

We propose a method of indoor localization using array sensors. This method uses not only the signal strengths of received signals, but also the spatial information of impinging signals on array sensors. The signal subspaces, which include information about the strengths and angles of arrival of impinging signals on the array sensors, are used to identify the location of the terminal. We use the cosines of the principal angles between the signal subspaces of the spatial covariance matrices of the signals received at an array antenna to measure the similarity between signals transmitted from two locations. We conducted an experiment indoors to confirm the validity and effectiveness of our method. The experimental results confirm its effectiveness.

关键词： sensor arrays

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