检索结果-内蒙古大学图书馆

Dynamic mainlobe interference suppression method based on monopulse with gray model Kalman filter

JOURNAL OF ENGINEERING-JOE 2019年第20期2019卷 6703-6707页

作者： Feng, Li Zhe, Zhang Di, Yao Beijing Inst Technol Sch Informat & Elect Beijing 100081 Peoples R China Beijing Key Lab Embedded Real Time Informat Proc Beijing 100081 Peoples R China

The architecture and processing algorithm of mainlobe interference suppression method is described for nulling the signal from mainlobe electronic jammer and multiple sidelobe electronic jammers while maintaining monopulse angle estimation accuracy on the target. The existing mainlobe interference suppression method is based on monopulse Wiener filtering. However, the Wiener filtering is more suitable to remove static interference. Therefore, the authors present the dynamic mainlobe interference suppression method with Gray Model Kalman filter to resolve this problem. The simulations verify the proposed method.

关键词： array signal processing jamming adaptive signal processing Wiener filters interference suppression radar signal processing adaptive antenna arrays Kalman filters multiple sidelobe electronic jammers monopulse angle estimation accuracy existing mainlobe interference suppression method monopulse Wiener filtering static interference dynamic mainlobe interference suppression method Gray Model Kalman filter gray model Kalman filter architecture processing algorithm mainlobe electronic jammer

来源：评论

学校读者我要写书评

暂无评论

Embedded Learning for Smart Functional Electrical Stimulation

Embedded Learning for Smart Functional Electrical Stimulatio...

引用

IEEE Instrumentation and Measurement Technology Conference

作者： Sebastián Marzetti Valentin Gies Valentin Barchasz Hervé Barthelemy Hervé Glotin Edith Kussener Remy Vauche Aix Marseille Université Université de Toulon CNRS IM2NP - UMR France Université de Toulon SMIoT France Aix Marseille Université Université de Toulon CNRS LIS - UMR France

ISBN: (数字)9781728144603

ISBN: (纸本)9781728144610

This paper presents a smart embedded Functional Electrical Stimulator (FES), able to stimulate a muscle only when a specific movement pattern occurs. This pattern is detected using an inertial measurement unit (IMU) coupled with a feature detector and a neural classifier. Architecture of the FES is first presented, then embedded processing algorithms composed of feature extraction and neural network classification are detailed. Results show that the muscle vibration happening when stimulation is needed can be recognized in more than 90% of cases using less than 3% of average embedded processor resources on a ARM M4F.

关键词： Functional Electrical Stimulator Embedded Learning Pattern Detection Embedded system Embedded systems FES gene Electric Stimulation Learning processing algorithm embedding patterning of movement Feature extraction embedded processor INERTIAL MEASUREMENT UNITS

来源：评论

学校读者我要写书评

暂无评论

Datasets meta-feature description for recommending feature selection algorithm

Datasets meta-feature description for recommending feature s...

引用

Artificial Intelligence and Natural Language and Information Extraction, Social Media and Web Search FRUCT Conference (AINL-ISMW FRUCT)

作者： Andrey Filchenkov Arseniy Pendryak ITMO University St. Petersburg Russia

ISBN: (纸本)9789526839714

Meta-learning is an approach for solving the algorithm selection problem, which is how to choose the best algorithm for a certain task. This task corresponds to a dataset in machine learning and data mining. The main challenge in meta-learning is to engineer a meta-feature description for datasets. In the paper we apply meta-learning for feature selection. We found a meta-feature set which showed the best result in predicting proper feature selection algorithms. We also suggested a novel approach to engineer meta-features for data preprocessing algorithms, which is based on estimating the best parametrization of processing algorithms on small subsamples.

关键词： Dataset Feature extraction processing algorithm Data preprocessing Engineers algorithms data mining

来源：评论

学校读者我要写书评

暂无评论

A Waveform with Low Intercept Probability for OFDM SAR

A Waveform with Low Intercept Probability for OFDM SAR

引用

Progress in Electromagnetic Research Symposium

作者： Xiang Yu Yaowen Fu Lei Nie Guanhua Zhao Wenpeng Zhang National University of Defense Technology

ISBN: (纸本)9781509060948

In this paper, we propose a novel orthogonal frequency-division multiplexing (OFDM) waveform with low probability of intercept (LPI) and the corresponding synthetic aperture radar (SAR) processing algorithm. The OFDM waveform has a random spectrum for each pulse, making it a good candidate for low probability of intercept system implementation. The SAR processing algorithm eliminates the influence of random spectrum and uses matched filtering, which has the same signal-to-noise ratio (SNR) gain as LFM signals. Simulation results illustrating the spectrogram of the proposed OFDM waveform and the algorithm's performance in 2-D SAR imaging scenarios are presented and discussed.

关键词： Orthogonal frequency division multiplexing Low probability of intercept Synthetic aperture radar waveforms intercept probability Rescue Specific absorption rate SAFETY ANALYSIS REPORTS LFM Spectrogram processing algorithm

来源：评论

学校读者我要写书评

暂无评论

LOS/NLOS DETECTION BY THE NORMALIZED RAYLEIGH-NESS TEST

LOS/NLOS DETECTION BY THE NORMALIZED RAYLEIGH-NESS TEST

引用

European signal processing conference

作者： F. Benedetto G. Giunta L. Vandendorpe Department of Applied Electronics University of Roma Tre via della Vasca Navale 84 00146 Rome Italy Communications and Remote Sensing Laboratory Universite Catholique de Louvain 1348 Louvain-la-Neuve Belgium

ISBN: (纸本)9781617388767

Deciding for the possible presence of a LOS component in a wireless radio link is preliminary to several operations that a communication receiver has to accomplish. In fact, NLOS radio models require more complex signal processing algorithms for data detection. We propose to adopt the normalized version of the Rayleigh-ness test (recently introduced for code acquisition purposes, as a measure of the Ricianity of the series under investigation) to obtain here a self-tunable test, independent of the actual power of the received signal. The achieved results evidence the robustness of the test.

关键词： communications receivers active power Radio links data detection code acquisition processing algorithm complex signal

来源：评论

学校读者我要写书评

暂无评论

Distributed recursive least-squares with data-adaptive censoring

Distributed recursive least-squares with data-adaptive censo...

引用

IEEE International Conference on Acoustics, Speech and Signal processing

作者： Zifeng Wang Zheng Yu Qing Ling Dimitris Berberidis Georgios B. Giannakis Special Class for the Gifted Young University of Science and Technology of China China Department of Automation University of Science and Technology of China China Department of Electrical and Computer Engineering University of Minnesota United States of America

ISBN: (纸本)9781509041183

The deluge of networked big data motivates the development of computation- and communication-efficient network information processing algorithms. In this paper, we propose two data-adaptive censoring strategies that significantly reduce the computation and communication costs of the distributed recursive least-squares (D-RLS) algorithm. Through introducing a cost function that underrates the importance of those observations with small innovations, we develop the first censoring strategy based on the alternating minimization algorithm and the stochastic Newton method. It saves computation when a datum is censored. The computation and communication costs are further reduced by the second censoring strategy, which prohibits a node updating and transmitting its local estimate to neighbors when its current innovation is less than a threshold. For both strategies, a simple criterion for selecting the threshold of innovation is given so as to reach a target ratio of data reduction. The proposed censored D-RLS algorithms guarantee convergence to the optimal argument in the mean-square deviation sense. Numerical experiments validate the effectiveness of the proposed algorithms.

关键词： Distributed networks distributed recursive least-squares (D-RLS) data-adaptive censoring DISTRIBUTED NETWORKS Technological Innovations Recursive Deluge network information arithmetic Newton method data reduction Communication Research Distribute big data processing algorithm

来源：评论

学校读者我要写书评

暂无评论

On the Effects of UE Transceiver Non-Reciprocity in Coordinated TDD Multi-Cell MIMO Network

On the Effects of UE Transceiver Non-Reciprocity in Coordina...

引用

IEEE Global Communications Conference

作者： Orod Raeesi Yaning Zou Antti Tolli Mikko Valkama Department of Electronics and Communications Engineering Tampere University of Technology Department of Communications Engineering University of Oulu

ISBN: (纸本)9781479959532

In this paper, we study the effects of effective channel non-reciprocity in coordinated TDD multi-cell MIMO network based on weighted sum rate (WSR) maximization. More specifically, we focus on UE transceiver non-reciprocity while the base stations (BS) are assumed to be perfectly calibrated, and both centralized and decentralized beamforming schemes are considered. In the centralized scheme, the cost function is constructed in a central controller using antenna specific UL pilots for channel estimation from all the connected BSs in the network. Then, even though the transceiver frequency response (FR) mismatches at the UE side corrupt the effective channel reciprocity, it is shown to have only a trivial impact on the WSR objective in such centralized case. However, when decentralized beamforming is deployed, the optimization is carried out in each BS and the corresponding cost function and optimization process depend on information acquired by over-the-air signaling between the BSs and all the users using precoded UL pilots. In this case, it is then shown that the transceiver FR mismatches at the UE side can cause severe performance degradation and even influence the convergence properties of the sum-rate optimization process. Further insight is provided for improving the performance by modifying the weight calculations in the optimization process and connecting users with good cell separations. Then a convergence-aware processing algorithm is also proposed to improve the performance of the decentralized scheme under UE transceiver non-reciprocity. Numerical experiments demonstrate that efficient processing algorithms for calibrating UE transceiver mismatches to be less than -30dB to -35dB are, in general, required in the decentralized system in order to achieve performance close to the ideal case without any RF imperfections.

关键词： Centralized beamforming Channel reciprocity Decentralized beamforming Multi-cell MIMO Precoding Time-division duplexing Transceiver frequency response mismatch prediction coding Optimization Procedure UNITED ELECTRIC Transceivers time division duplex processing algorithm multiple input multiple output systems Cost functions degradation of performance Cell Separation central controller tal demand distortion Decentralized Bahamas

来源：评论

学校读者我要写书评

暂无评论

The Far-Field Threshold Evaluation of the Frequency Diversity Arrays

The Far-Field Threshold Evaluation of the Frequency Diversit...

引用

2020 IEEE Ukrainian Microwave Week (UkrMW)

作者： Anton Shevchenko Vitaliy Samokvit Stanislav Piskunov Kharkiv National Air Force University Kharkiv Ukraine

ISBN: (数字)9781728173139

ISBN: (纸本)9781728173146

In this paper, a problem of the evaluation of the far-field (Fraunhofer) zone (FZ) threshold of the frequency diversity arrays (FDA) for multipurpose using is presented. It is shown, that because of space-time dependency of the array field, such parameters of partial signals as a relative bandwidth, a spectrum overlap factor and an amplitude distribution should be taken into account for FZ threshold evaluation. Criteria for FZ threshold based on the relative errors of the evaluation of the time-dependent directivity factor is proposed. As an example of the linear equidistant FDA, estimates of the FZ threshold by proposed criteria are obtained. The results can be useful to the design of processing algorithms of cognitive control for FDA radars, as well as in experimental and simulation studies.

关键词： far-field threshold Fraunhofer zone frequency diversity array cognitive radar relative bandwidth spectrum overlap factor amplitude distribution amplitude distribution FLOW ZONE Frequency diversity far-field processing algorithm United States Food and Drug Administration FUEL DISTRIBUTION ANALYZER relative errors

来源：评论

学校读者我要写书评

暂无评论

A Multi-Baseline Stereo System for Scene Segmentation in Natural Environments

A Multi-Baseline Stereo System for Scene Segmentation in Nat...

引用

IEEE Conference on Technologies for Practical Robot Applications

作者： Annalisa Milella Giulio Reina Mario Massimo Foglia Institute of Intelligent Systems for Automation (ISSIA) National Research Council (CNR) Department of Engineering for Innovation University of Salento Department of Mechanics Mathematics and Management Polytechnic of Bari

ISBN: (纸本)9781467362238

A long range visual perception system is presented based on a multi-baseline stereo frame. The system is intended to be used onboard an autonomous vehicle operating in natural settings, such as an agricultural environment, to perform 3D scene reconstruction and segmentation tasks. First, the multi-baseline stereo sensor and the associated processing algorithms are described;then, a self-learning ground classifier is applied to segment the scene into ground and non-ground regions, using geometric features, without any a priori assumption on the terrain characteristics. Experimental results obtained with an off-road vehicle operating in an agricultural test field are presented to validate the proposed approach. It is shown that the use of a multi-baseline stereo frame allows for accurate reconstruction and scene segmentation at a wide range of viewing distances, thus increasing the overall flexibility and reliability of the perception system.

关键词： segmentation reconstruction autonomous segmentation Segmentation Reconstructions Acoustic equipment Reconstructive Surgical Procedures wide-range Natural environment processing algorithm Autonomous Vehicles road vehicles ground Environments

来源：评论

学校读者我要写书评

暂无评论

Design of a Novel Digital Phantom for EIT System Calibration

Design of a Novel Digital Phantom for EIT System Calibration

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society

作者： Nan Li Wei Wang Hui Xu Biomedical Engineering Research Group University of Sussex University of Sussex National University of Defense Technology

ISBN: (纸本)9781424441211

This paper presented the design method of a novel digital phantom for electrical impedance tomography system calibration. By current sensing, voltage generating circuitry and digital processing algorithms implemented in FPGA, the digital phantom can simulate different impedances of tissues. The hardware of the digital phantom mainly consists of current sensing section, voltage generating section, electrodes switching section and a FPGA. Concerning software, the CORDIC algorithm is implemented in the FPGA to realize direct digital synthesis (DDS) technique and related algorithms. Simulation results show that the suggested system exhibits sufficient accuracy in the frequency range 10 Hz to 2 MHz. With the advantages offered by digital techniques, our approach has the potential of speed, accuracy and flexibility of the EIT system calibration process.

关键词： Field programmable gate arrays Imaging Phantom design approach DIGITAL TECHNIQUES EIT Digit direct digital synthesis current sensing Digital frequency ranges processing algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：