检索结果-内蒙古大学图书馆

10th All-Russian Conference on Irreversible Processes in Nature and technology

作者： Klyuev, S.B. Nefyodov, E.I. Potapov, A.A. RPC Istok 2A Vokzalnaya Str Fryazino Moscow Region141190 Russia Fryazino Branch of kotel'Nikov Institute of Radio Engineering and Electronics of RAS Vvedenskiy Sq. Fryazino Moscow Region1 141195 Russia Kotel'Nikov Institute of Radio Engineering and Electronics of RAS Mokhovaya St. Moscow125009 Russia College of Information Science and Technology / College of Cyber Security Guangzhou510632 China Cooperative Chinese-Russian Laboratory of Informational Technologies and Signals Fractal Processing Guangzhou510632 China

The electrodynamic properties of a symmetric slot line with a dielectric insert are investigated. A numerical analysis of the transmission line is performed using the finite element method. The dispersion matrix elements of the transmission line are presented. It is shown that the model of a symmetric slot line with a dielectric insert can extend the operating frequency band more than 2 times. © Published under licence by IOP Publishing Ltd.

关键词： Electric lines

来源：评论

学校读者我要写书评

暂无评论

Welcome Messages from BigTrust 2018

Proceedings - 15th IEEE International Conference on Mobile A...

引用

Proceedings - 15th IEEE International Conference on Mobile Ad Hoc and Sensor Systems, MASS 2018 2018年 XXVII页

作者： Liu, Qin Jiang, Wenjun Bhuiyan, Md Zakirul Alam You, Ling Xiao, Mingjun Hunan University China Fordham University United States National Key Laboratory of Science and Technology on Blind Signal Processing China University of Science and Technology of China China

来源：评论

学校读者我要写书评

暂无评论

Dynamic range impact on 3D MIMO channel characteristics in rural-macro scenario at 3.5 GHz 12

Dynamic range impact on 3D MIMO channel characteristics in r...

引用

12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Zhang, Weite Tian, Lei Wu, Zhongyuan Zhang, Jianhua Zheng, Yi Cao, Jingmin Key Lab of Universal Wireless Communications Ministry of Education China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China China Mobile Research Institude Beijing China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu Sichuan China

ISBN: (纸本)9781785617911

Rural-macro (RMa) is an important scenario for fifth generation (5G) deployment, and there is a strong diffraction in RMa making it difficult to distinguish between line-of-sight (LoS) and non-line-of-sight (NLoS) case. Since the environmental condition is closely related to the dynamic range of channel impulse response (CIR), this paper studies the dynamic range impact on characteristics of three dimensional (3D) multiple-input multiple-output (MIMO) channels based on 3.5 GHz measurement campaign in RMa. The space-alternating generalized expectation-maximization (SAGE) algorithm is employed to estimate multipath component parameters. The channel statistical characteristics, channel capacity and eigenvalues of CIR matrix are calculated for different CIR dynamic ranges. The results show that the delay spread, the angle spread, the channel capacity and the sub-channel correlation are linearly related to the dynamic range of CIR. Thus, the results give a new perspective to study channel characteristics based on CIR dynamic range in RMa scenario. © 2018 Institution of Engineering and *** Rights Reserved.

关键词： Channel capacity

来源：评论

学校读者我要写书评

暂无评论

A novel clustering method based on density peaks and its validation by channel measurement 12

A novel clustering method based on density peaks and its val...

引用

12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Xue, Hanqing Tian, Lei Zhang, Yuxiang Wang, Chao Zhang, Jianhua Li, Wei Wei, Hewen Key Lab of Universal Wireless Communications Ministry of Education China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications P. O. Box 92 Beijing100876 China Department of Electrical Engineering Northern Illinois University DeKalbIL60115 United States National key laboratory of science and technology on blind signal processing Chengdu Sichuan610041 China

ISBN: (纸本)9781785617911

In this paper, cluster centers are defined as local maxima in the density which is called density peaks. We use an algorithm based on density peaks to cluster multipath components (MPCs) whose parameters are estimated by the space-alternating generalized expectation-maximization (SAGE) algorithm. To validate its performance, we apply it to the data from a channel measurement in an indoor scenario at 28 GHz and compare it to the widely used KPowerMeans algorithm with the same distance metric of multiple component distance (MCD). Through the results, we find it can cluster MPCs more accurately validated by Calinski-Harabasz (CH) and Davies-Bouldin (DB) indices. More importantly, it overcomes the shortcoming of setting the number of clusters manually because we can determine the cluster centers automatically. Besides, the efficiency of DP clustering is far superior to KPowerMeans because what it needs is only a distance matrix and we only need to compute it once. At the end, statistical analysis of clusters are presented to provide insights in channel modeling of millimeter wave. © Institution of Engineering and *** Rights Reserved.

关键词： Millimeter waves

来源：评论

学校读者我要写书评

暂无评论

Comparative channel study of ray tracing and measurement for an indoor scenario at 28 GHz 12

Comparative channel study of ray tracing and measurement for...

引用

12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Zhan, Jinnan Zhang, Jianhua Tian, Lei Zhang, Xinzhuang Tang, Pan Dou, Jianwu Wei, Hewen Key Lab of Universal Wireless Communications Ministry of Education New Zealand State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China Wireless Algorithm Department Product R and D system ZTE Corp. Ltd. Shanghai201210 China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu Sichuan610041 China

ISBN: (纸本)9781785617911

The millimeter wave communication is important for future wireless systems. In this paper, the channel characteristics at 28 GHz in an indoor scenario are researched based on ray tracing (RT) simulation and measurement. In the RT simulation, various configurations, such as different number of reflections, diffractions and penetrations are used. As for the measurement, two setups are implemented in order to analyze more parameters. Setup one is that biconical antennas are used at both the transmitter (TX) and receiver (RX). The other setup is that horn antenna at RX is rotated 360◦ in azimuth with a step of 5◦ when an omni-directional antenna located at TX. Meanwhile, antenna is rotated one circle with an elevation angle of 10◦, 0◦ and -10◦, respectively. Path loss and K-factor are analyzed firstly, and analysis results indicate the RT result with 1 or 2 reflections, 1 diffractions and 5 penetrations in this conference room is closest to the measurement result and channel models in 3GPP TR 38.901. Then, the root mean square (RMS) delay spread and RMS angular spread are investigated, which shows the value of measurement is a bit larger than RT because of the limitation of azimuth and elevation step. According to all the results, 1-2 reflections, 1 diffraction and 5 penetrations can be used in RT for future analysis of indoor scenario at 28 GHz. © Institution of Engineering and *** Rights Reserved.

关键词： Ray tracing

来源：评论

学校读者我要写书评

暂无评论

Radio Frequency Fingerprint Extraction of Radio Emitter Based on I/Q Imbalance

引用

Procedia Computer science 2017年 107卷 472-477页

作者： Fei zhuo Yuanling Huang Jian chen National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu China

Specific emitter identification use external signal feature called radio frequency fingerprint to identify the different radio transmitter, which does not rely on information content. A radio frequency fingerprint feature extraction approach based on I/Q imbalance of quadrature modulation signal is proposed. A I/Q modulator model is utilized to investigate the sources of radio frequency fingerprint and the effect on signal. A fingerprint features extraction based on signal space is proposed, but the SNR (Signal to Noise Ratio) need to be estimated before. Simulation results demonstrate that the method have superior performance than previous bispectrum-based, Hibert-Huang transform-based approaches.

关键词： specific emitter identification I/Q imbalance signal space autocorrelation matrix

来源：评论

学校读者我要写书评

暂无评论

A Separation and Decoding algorithm for QPSK signals with Low Complexity

A Separation and Decoding algorithm for QPSK Signals with Lo...

引用

2017 International Conference on Electronic Information technology and Computer Engineering (EITCE 2017)

作者： Baijun Pan Shilong Tu Science and Technology on Blind Signal Processing Laboratory

In this paper, we consider separation and decoding for two QPSK signals, which have the same symbol rates. However, the complexity of the present method is too high. To solve this question, an algorithm based on lattice reduction and joint iteration is proposed to enhance the separation performance. The complexity is greatly reduced while retains considerable performance. Simulation results are provided to illustrate the performance of the proposed algorithm.

关键词： A Separation and Decoding algorithm for QPSK signals with Low Complexity

来源：评论

学校读者我要写书评

暂无评论

A Fast Distributed Direct Postion Determination Algorithm Based on Delay and Doppler

A Fast Distributed Direct Postion Determination Algorithm Ba...

引用

2017 2nd International Conference on Control, Automation and Artificial Intelligence(CAAI2017)

作者： Zhuo Qiu Science and Technology On Blind Signal Processing Laboratory

In the moving sensor network, the direct positioning method(DPD) can greatly improve the positioning performance of the system, but it also brings the problem of high computational complexity and poor stability of the algorithm. In this paper, a distributed fast DPD algorithm based on timefrequency difference is proposed. The complex large-scale matrix operation and the maximal eigenvalue solution in the original DPD algorithm are replaced by the cross ambiguity function(CAF) and the matrix norm respectively. An effective distributed computing method is designed to make full use of the sensor network Of the computation resources. The simulation results show that the proposed method can greatly simplify the computational complexity, improve the stability of the algorithm, while the location performance is equivalent to the original DPD algorithm.

关键词： DPD matrix norm time-frequency difference cross Ambiguity Function(CAF)

来源：评论

学校读者我要写书评

暂无评论

Efficient closed-form estimator for moving source localization using TDOA-FDOA-AOA measurements 17

Efficient closed-form estimator for moving source localizati...

引用

6th WASE International Conference on Information Engineering, ICIE 2017

作者： Deng, Bing Sun, Zheng Bo He, Qin Zhengzhou Institute of Information Science and Technology P.O. Box 450001 China National Key Laboratory of Science and Technology on Blind Signal Processing P.O. Box 610041 China

ISBN: (纸本)9781450352109

This paper1 proposes a simple and efficient closed-form solution for a moving source localization using the time difference of arrival (TDOA), frequency difference of arrival (FDOA) and angle of arrival (AOA) measurements obtained at spatially distributed moving receivers. Comparing with the localization scenario utilizing TDOA and AOA measurements only, this hybrid localization scheme by adding FDOA measurements can improve source position estimate accuracy and gain source velocity information in the same time. Theoretical analysis and simulations verify the approximate efficiency of the developed positioning technique and its improved performance over the benchmark iterative method. © 2017 Copyright held by the owner/author(s).

关键词： Time difference of arrival

来源：评论

学校读者我要写书评

暂无评论

A comparative study on the accuracy of two methods for time delay estimation 17

A comparative study on the accuracy of two methods for time ...

引用

6th WASE International Conference on Information Engineering, ICIE 2017

作者： Zhao, Pei Yan Qin, Ji Dong Peng, Hua Feng National Key Laboratory of Science and Technology on Blind Signal Processing P.O. Box 610041 China Zhengzhou Institute of Information Science and Technology P.O. Box 450001 China

ISBN: (纸本)9781450352109

This paper1 presents an accuracy analysis of Time Delay Estimation (TDE) in the passive location system. Firstly, the signal processing model using the information of envelope and phase are presented, respectively. Then the Cramer-Rao Lower Bounds (CRLB) for phase delay estimation is developed. The bound is shown to be inversely proportional to carrier wavelength, and for narrowband signals, independent of the signals bandwidth. Simulation results show that the theoretical analysis is correct, and the use of phase information alone or in combination with the envelope information is expected to significantly improve the accuracy of time delay estimation. © 2017 Copyright held by the owner/author(s).

关键词： Timing circuits

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：