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检索条件"任意字段=2016 IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2016"

共 1002 条记录，以下是71-80 订阅

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Adaptive Pulse Design for Space-Time Adaptive processing

Adaptive Pulse Design for Space-Time Adaptive Processing

引用

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

作者： Patton, Lee K. Hack, Daniel E. Himed, Braham Matrix Res Dayton OH USA AF Res Lab Wright Patterson AFB OH USA

ISBN: (纸本)9781467310710

Space-time adaptive processing (STAP) is used in radar to adaptively suppress both ground clutter returns and radio frequency interference (RFI). However, RFI suppression utilizes degrees-of-freedom that would otherwise be applied to clutter suppression. This paper considers designing the transmit pulse so that fast-time correlated (i.e., colored) RFI is suppressed in the pulse-compression stage preceding the STAP processor. The objective function and constraints for the waveform optimization are derived, and a numerical example demonstrating the efficacy of the approach is provided.

关键词： Space time adaptive processing Radiofrequency interference numerical example Vital Signs fast timing radio frequency interference suppression Ground clutter clutter suppression

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A Note on The Maximum Number of Sources in DOA Estimation by MODE 11

A Note on The Maximum Number of Sources in DOA Estimation by...

引用

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

作者： Hamada, Shohei Ichige, Koichi Yokohama Natl Univ Dept Elect & Comp Engn Hodoga Ku 79-5 Tokiwadai Yokohama Kanagawa 2408501 Japan

ISBN: (纸本)9781728119465

This paper discusses the maximum number of sources when their direction of arrivals (DOAs) are estimated by the method of direction estimation (MODE), and presents a modified version of MODE that can estimate more number of sources than that by the original MODE. It is well-known that M-element array can basically estimate up to (M - 1) DOAs, however the application of MODE may reduce up to M/2 DOAs because of its computation procedure. We propose a novel DOA estimation method by modifying MODE to employ peak-search of the primary eigenvector beam patterns instead of the null-search in the original MODE. Performance of the proposed method is evaluated through computer simulation.

关键词： direction of arrival estimation MODE array signal processing number of sources

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Local polynomial approximation based beamforming for localization of rapidly moving sources

Local polynomial approximation based beamforming for localiz...

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

作者： Katkovnik, V Gershman, AB Tampere Univ Technol Int Ctr Signal Proc FIN-33101 Tampere Finland

ISBN: (纸本)0780363396

A windowed local polynomial approximation (LPA) of time-varying directions-of-arrival (DOA's) is exploited to derive a new form of beamformer for source localization and tracking in highly nonstationary environments. The relationship between our LPA-beamformer and the conventional beamformer is derived. Closed-form expressions are obtained for the bias and variance of the LPA-beamformer in the non stationary case and the problem of optimal window choice is discussed.

关键词： array signal processing Closed-form solution Direction of arrival estimation Gaussian noise Motion estimation Polynomials sensor arrays signal processing signal processing algorithms Tracking

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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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AN ALTERNATING MINIMIZATION APPROACH TO OPTIMIZING SUBarray CONFIGURATION FOR A LARGE PHASED array 10

AN ALTERNATING MINIMIZATION APPROACH TO OPTIMIZING SUBARRAY ...

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

作者： Pu, Wenqiang Yu, Yong Yu, Shuhua Luo, Zhi-Quan Xidian Univ Natl Lab Radar Signal Proc Xian Shaanxi Peoples R China China Elect Technol Grp Corp Beijing Peoples R China Chinese Univ Hong Kong Shenzhen Res Inst Big Data Shenzhen Peoples R China

ISBN: (纸本)9781538647523

A large size phased array is a powerful system for surveillance, but must be appropriately decomposed as subarrays for efficient digital beamforming. One fundamental question is how to configure a large array as subarrays to satisfy various signal processing requirements. This work deals with two basic signal processing tasks, synthesizing multiple beams at subarray level and adaptively suppressing multiple interferences. Two optimization criteria to jointly design subarray configuration and digital weights for subarrays are proposed. To handle the large number of variables in the optimization formulations, we propose an alternating minimization approach with low computation cost. Numerical simulations are presented to demonstrate the effectiveness of the proposed algorithm.

关键词： Phased array subarray beamforming alternating optimization

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Localization and array Shape Estimation Using Software Defined Radio array Testbed

Localization and Array Shape Estimation Using Software Defin...

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8th ieee sensor array and multichannel signal processing workshop (sam)

作者： Akindoyin, Akinbiyi Willerton, Marc Manikas, Athanassios Imperial Coll London Elect & Elect Engn London England

ISBN: (纸本)9781479914814

The emergence of software defined radio (SDR) aims to increase flexibility as well as reduce cost, size, weight and power (SWAP) inherent in traditional hardware radios. This paper is concerned with addressing issues associated with the formation of an array system from multiple SDR boards where each has an independent local oscillators (LO) in a multi-antenna system using representative examples such as localization and array shape estimation. In particular, practical experimental results are initially presented for estimating the unknown location of a single source using an SDR array of known array geometry. Furthermore, in the case that the SDR array geometry is unknown, a novel array shape estimation algorithm is proposed. The proposed algorithm estimates the antenna locations without requiring any external sources. This is achieved by allowing the array elements operate as transceivers.

关键词： Software defined radio array shape estimation localization

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Distributed Ensemble Kalman Filtering

Distributed Ensemble Kalman Filtering

引用

8th ieee sensor array and multichannel signal processing workshop (sam)

作者： Shahid, Arslan Uestebay, Deniz Coates, Mark McGill Univ Dept Elect & Comp Engn Montreal PQ H3A 2A7 Canada

ISBN: (纸本)9781479914814

We address the problem of distributed filtering in a wireless sensor network and develop distributed approximations of three variants of the ensemble Kalman filter. We express the update equations in an alternative information form in order to formulate a distributed measurement update mechanism. The distributed filters use randomized gossip to reach consensus on the statistics needed to perform an update. Simulation results suggest that in the case of linear measurements and high-dimensional nonlinear measurements (with measurement model parameters known network-wide) with nonlinear state dynamics the proposed schemes achieve accuracy comparable to state-of-the-art distributed filters while significantly reducing the communication overhead.

关键词： Kalman filtering Distribute Wireless sensor networks Linear measurement Filters Distributed measurement Simulation results Gossip

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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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Beamformer Bank Optimization for True Time Delay Beam-Space processing

Beamformer Bank Optimization for True Time Delay Beam-Space ...

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

作者： Wilkins, Nathan Shaw, Arnab USAF Res Lab Munit Directorate Eglin AFB FL 32542 USA Wright State Univ Dept Elect Engn Dayton OH USA

ISBN: (纸本)9781467310710

The authors examine optimization of the antenna array beamformer bank for a technique to apply coherent signal subspace processing in the beam-space of a bank of true time delay beamformers. This technique offers computational expense advantages over element-space methods, Mean Square Error (MSE) performance similar to wideband coherent subspace techniques and is frequency invariant. This article reports on simulation experiments to improve the true time delay beamformer bank configuration so as to optimize MSE performance of source direction resolution for closely spaced wideband sources. Simulations include pattern search, genetic algorithm and simulated annealing global optimization methods. Results indicate that performance can be significantly improved by applying these methods to the beamformer bank design.

关键词： true time delay space processing Genetic Algorithm (GA) signal subspace

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Limited Field-of-View Multimodal sensor Adaptation for Data Association

Limited Field-of-View Multimodal Sensor Adaptation for Data ...

引用

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

作者： O'Rourke, Sean M. Swindlehurst, A. Lee Univ Calif Irvine Ctr Pervas Commun & Comp Irvine CA 92697 USA

ISBN: (纸本)9781467310710

We have investigated the utility of field-of-view adaptation for multimodal sensing in cluttered multi-target environments. Measurement data from multiple integrated sensors are collected at a fusion center, which employs a soft association procedure to integrate them into the estimation procedure. A variance penalty model for the limited fields-of-view property is incorporated into the state estimation procedure. This model also forms the basis of an optimization problem that determines the best next-step sensing parameters for the changing target environment. Numerical simulations demonstrate the benefit of the proposed method for both tracking and association metrics compared to a non-adaptive tracker.

关键词： Multimodal sensing data association assessment procedure integrated sensor

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