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4th International Congress on Image and signal processing, CISP 2011

作者： Averyanov, A.V. Glebova, G.M. Shimko, O.E. Research Institute of Physics Southern Federal University SFU Rostov-on-Don Russia

ISBN: (纸本)9781424493067

In this paper the Cramer-Rao lower bound (CRLB) for the linear vector-sensor array is calculated in ambient noise, caused by the rough sea surface. Various formations of the input signals from the pressure and particle velocity receivers of vector-sensor array are presented. Algorithm based on the formation of the flow of power from the pressure and particle velocity receiver is considered in addition to the common methods of processing the input signals. It is shown that the accuracy of the estimate of source parameters depends on the method of forming the input signals at the vector-sensor array and also on the type of ambient noise. thus, for the algorithm based on the power flow of signals, the ratio of signal-noise at the output of the receiving system is more than 100 times higher than for traditional signal processing from pressure sensor arrays. © 2011 ieee.

关键词： Vectors

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Joint time-delay and frequency offset synchronization for CDMA array-receivers 4

Joint time-delay and frequency offset synchronization for CD...

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4th ieee workshop on signal processing Advances in Wireless Communications (SPAWC)

作者： Smida, B Affes, S Mermelstein, P Univ Quebec INRS Telecommun Montreal PQ H5A 1K6 Canada

ISBN: (纸本)078037858X

this paper addresses the problem of joint time-delay and frequency synchronization in the CDMA receiver STAR. We observe that its space/time structural approach enables us to decouple time and frequency offsets. We thus introduce a new procedure based on space/time separation that implements a simple linear regression approach for both time-delay and frequency synchronization. We analyze the performance of this procedure in an unknown time-varying channel with multipath and carrier offset. Simulations show that the modified STAR provides significant performance gain over its previous version. the link-level gain is more than 3 dB for BPSK (128 kb/s) when the frequency offset equals 0.1 ppm (i.e., 200 Hz). this gain increases at higher frequency offsets and small-constellation modulations.

关键词： Time delay

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Multiple source localization based on biased bearings using the intensity filter - Approach and experimental results

Multiple source localization based on biased bearings using ...

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2011 4th ieee International workshop on Computational Advances in Multi-sensor Adaptive processing, CAMSAP 2011

作者： Schikora, Marek Oispuu, Marc Koch, Wolfgang Cremers, Daniel Fraunhofer FKIE Dept. Sensor Data and Information Fusion Neuenahrer Straße 53343 Wachtberg Germany TU Munich Dept. Computer Science Boltzmannstr. 3 85748 Garching Germany

ISBN: (纸本)9781457721052

this paper investigates the three-dimensional localization problem for multiple emitters using a realistic airborne array sensor. In order to achieve improved results systematic and statistical direction finding errors are considered in a unified algorithm. the task is solved using a sequential Monte Carlo (SMC) implementation of the intensity filter (iFilter). In this paper, we compare two localization approaches without and with the consideration of systematic bearing errors and verify them with an experimental data set. the comparison of both approaches reveals that the bias consideration offers a superior performance. © 2011 ieee.

关键词： Bandpass filters

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UWB Microwave Monopulse Radar System for Breast Cancer Detection

UWB Microwave Monopulse Radar System for Breast Cancer Detec...

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4th International Conference on signal processing and Communication Systems (ICSPCS)/12th International Symposium on DSP and Communication Systems (DSPCS)/9th workshop on the Internet, Telecommunications and signal processing (WTSP)

作者： Bialkowski, Marek E. Wang, Yifan Abbosh, Amin Univ Queensland Sch Informat Technol & Elect Engn St Lucia Qld 4072 Australia

ISBN: (纸本)9781424479078

the concept of an Ultra Wideband (UWB) Monopulse Microwave Radar System for detection and location of breast cancer is described. the system uses a two-element Tapered Slot Antenna (TSA) array accompanied by a UWB 180 degrees hybrid which scans the breast. When the breast tissue features symmetry with respect to the array axis and the hybrid enables the 180 degrees out phase feeding operation, the array automatically eliminates background while extracting information about an off axis target. the data obtained from the scan is post-processed using a novel imaging algorithm to locate the target. the design of the required 2-element UWB array antenna and the 180 degrees hybrid is presented. the validity of the proposed breast cancer detection method is demonstrated in an example of a simple breast phantom formed by a cylindrical plastic container filled with a vegetable oil and small cylindrical targets.

关键词： UWB microwave monopulse radar system biomedical imaging breast cancer detection breast cancer location breast tissue cancer imaging algorithm microwave antenna arrays microwave imaging radar imaging small cylindrical targets tapered slot antenna array ult

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Dynamic sensors compensation issue

Dynamic sensors compensation issue

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4th ieee International workshop on Intelligent Data Acquisition and Advanced Computing Systems

作者： Krasodomski, Michal Tech Univ Szczecin Inst Control Engn PL-71126 Szczecin Poland

ISBN: (纸本)9781424413478

sensors sensitivities influence on signal processing quality is considered in the article. Different sensitivities cause interaction between additive and multiplicative errors. Parallel compensation structure is applied. Classic approach is characterized and two unconventional approaches are proposed. Proposed approaches turn out to be more accurate than classic. Mathematical analysis of problem and experimental verification are presented.

关键词： identification compensation sensor model

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Semiblind multiuser MIMO channel estimation using capon and MUSIC techniques

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ieee TRANSACTIONS ON signal processing 2006年第9期54卷 3581-3591页

作者： Shahbazpanahi, Shahram Gershman, Alex B. Giannakis, Georgios B. Univ Ontario Fac Engn & Appl Sci Inst Technol Oshawa ON L1H 7K4 Canada Tech Univ Darmstadt Commun Syst Grp D-64283 Darmstadt Germany Univ Minnesota Dept Elect & Comp Engn Minneapolis MN 55455 USA

Channel state information (CSI) is required at the receiver side of multiple-input multiple-output (MIMO) systems for decoding space-time codes. In this paper, new semiblind techniques are developed to jointly estimate the receiver CSI of multiple multiantenna transmitters that use orthogonal space-time block codes (OSTBCs). the proposed techniques are based on the extension of the concepts of the popular Capon and MUSIC spectral estimators to the problem of multiuser channel estimation. Our methods blindly estimate the subspace that contains the user channel matrices, and then use only a few training symbol blocks to extract the user CSI from this subspace. It is demonstrated that, in addition to improving the bandwidth efficiency, the proposed techniques offer better channel estimation accuracy as compared with the standard (nonblind) least-squares (LS) channel estimation method. Moreover, it is shown that using the proposed Capon- and MUSIC-based semiblind channel estimators along with the coherent maximum-likelihood (ML) or the minimum-variance (MV) multiuser MIMO receivers results in a substantially better performance as compared with the case when the standard LS channel estimates are used.

关键词： capon and MUSIC techniques multiuser multiple-input multiple-output (MIMO) receivers serniblind MIMO channel estimation

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A Bayesian approach to tracking wideband targets using sensor arrays and particle filters

A Bayesian approach to tracking wideband targets using senso...

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12th ieee workshop on Statistical signal processing

作者： Ng, W Reilly, JP Kirubarajan, T McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada

ISBN: (纸本)0780379977

this paper presents a Bayesian approach for tracking the directions-of-arrival (DOAs) of multiple wideband moving targets using a linear, passive sensor array, for use in smart antenna wireless applications, for example. A novel form of posterior distribution describing the parameters of the received signal is developed. the nuisance parameters (source amplitudes and variances) of this distribution are integrated out to form a more computationally efficient estimator. the desired parameters are then tracked using particle filtering techniques. Simulation results demonstrate the effectiveness and robustness of this method.

关键词： Bayesian methods Broadband antennas Directive antennas Intelligent sensors Linear antenna arrays Particle filters Particle tracking sensor arrays Target tracking Wideband

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Design of a smart transdermal insulin drug delivery system

Design of a smart transdermal insulin drug delivery system

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4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE)

作者： Hou, Zhenqing Lin, Chenghong Zhang, Qiqing Xiamen Univ Key Lab Biomed Engn Fujian Prov Biomed Engn Res Ctr Xiamen Peoples R China Xiamen Univ Key Lab Biomed Engn Fujian Prov Dept Biomat Mat Coll Xiamen Peoples R China

ISBN: (纸本)9781424447138

In this paper, a micro-needle array combined with transdermal delivery, as well as the detection of micro-sensors intelligent transdermal insulin delivery systems was designed with characteristics of pain-free, smart, timing, positioning, quantitative drug delivery. Transdermal delivery of the requirements for the design of the transdermal delivery of the microneedle array structure, and UV-LIGA process for the production of polymer micro-needle technology are discussed. Painless and accurate test in accordance with the needs of blood glucose concentration was designed transdermal detection of subcutaneous tissue fluid glucose concentration of micro-glucose sensor, and its manufacturing process are discussed. Combination of sensor signal processing and administration needs to control the system's signal processing and control circuit for a preliminary design.

关键词： Intelligent drug delivery micro-needle array micro-glucose sensor

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A robust linear receiver for uplink multi-user MIMO systems based on probability-constrained optimization and second-order cone programming

A robust linear receiver for uplink multi-user MIMO systems ...

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2004 sensor array and multichannel signal processing workshop

作者： Rong, Yue Vorobyov, Sergiy A. Gershman, Alex B. Department of Communication Systems University of Duisburg-Essen 47057 Duisburg Germany Department of Electrical and Computer Engineering McMaster University Hamilton Ont. L8S 4K1 Canada

ISBN: (纸本)0780385454

Traditional receiver algorithms developed for multiple-input multiple-output (MIMO) wireless communication systems are based on the assumption that the channel state information (CSI) is perfectly known at the receiver. However, in real environments the exact CSI is unavailable. In this paper, we address the problem of robustness of multiuser space-time block coded MIMO systems against imperfect CSI and develop a simple linear receiver which guarantees robustness against CSI errors with a certain selected probability. the proposed receiver is formulated via a probability-constrained optimization problem which is further relaxed using Chebyshev inequality to a much simpler second-order cone programming (SOCP) problem. Simulations demonstrate that the proposed receiver has a moderate performance degradation as compared to the exact solution to the original probability-constrained optimization problem, while offering much simpler implementation. ©2004 ieee.

关键词： signal receivers

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SAM 2008 - the fifth ieee sensor array and multichannel signal processing workshop

SAM 2008 - The fifth IEEE sensor array and multichannel sign...

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sensor array and multichannel signal processing workshop

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