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浏览/检索结果: 共15条，第1-10条 帮助

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Off-Line Evaluation of Indoor Positioning Systems in Different Scenarios: The Experiences From IPIN 2020 Competition 期刊论文  OAI收割
IEEE SENSORS JOURNAL, 2022, 卷号: 22, 期号: 6, 页码: 5011-5054
作者:  Potorti, Francesco;  Torres-Sospedra, Joaquin;  Quezada-Gaibor, Darwin;  Jimenez, Antonio Ramon;  Seco, Fernando
  |  收藏  |  浏览/下载：49/0  |  提交时间：2022/12/07
In-vehicle localization based on multi-channel Bluetooth Low Energy received signal strength indicator 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS, 2020, 卷号: 16, 期号: 1, 页码: 13
作者:  Gao Yuan;  Zhao Ze;  Huang Changcheng;  Han Chuanqi;  Cui Li
  |  收藏  |  浏览/下载：44/0  |  提交时间：2020/12/10
一种层次聚类和自适应加权K近邻组合的室内定位算法 期刊论文  OAI收割
时间频率学报, 2020, 卷号: 43, 期号: 4, 页码: 300
作者:  胡传君;  翟俊杰;  李廷会;  黄飞江;  袁海波
  |  收藏  |  浏览/下载：23/0  |  提交时间：2021/11/29
Combined optimisation of waveform and quantisation thresholds for multistatic radar systems 期刊论文  OAI收割
IET SIGNAL PROCESSING, 2018, 卷号: 12, 期号: 5, 页码: 559-565
作者:  Zhu, Jiang;  Ji, Daxiong;  Xu, Zhiwei;  Si, Bailu
  |  收藏  |  浏览/下载：23/0  |  提交时间：2021/02/02
Signal synthesis of time-domain electromagnetic response excited by a pseudo random binary sequence source 期刊论文  OAI收割
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2016, 卷号: 59, 期号: 12, 页码: 4414-4423
作者:  Wang, Ruo;  Wang, Miao-Yue;  Di, Qing-Yung;  Xue, Guo-Qiang;  Yin, Chang-Chun
  |  收藏  |  浏览/下载：25/0  |  提交时间：2017/11/20
Reference selection for hybrid TOA/RSS linear least squares localization 会议论文  OAI收割
2013 IEEE 78th Vehicular Technology Conference, VTC Fall 2013, Las Vegas, NV, United states, September 2, 2013 - September 5, 2013
作者:  Wang, Yue;  Zheng, Feng;  Wiemeler, Michael;  Xiong, Weiming;  Kaiser, Thomas
收藏  |  浏览/下载：74/0  |  提交时间：2014/04/30
基于无线传感器网络的室内定位方法研究 学位论文  OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2012
作者:  李红春
收藏  |  浏览/下载：124/0  |  提交时间：2015/09/02
Physical layer design for free space optical communication (EI CONFERENCE) 会议论文  OAI收割
2012 International Conference on Control Engineering and Communication Technology, ICCECT 2012, December 7, 2012 - December 9, 2012, Shenyang, Liaoning, China
作者:  Wang H.;  Zhang Q.;  Guo J.;  Guo J.;  Wang H.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
A small size Free Space Optical Communication System is introduced  including the hardware and the hardware specified physical layer protocol. In detail  the rapid synchronization method to reduce the handshake bandwidth requirement is demonstrated. The hardware of the system includes the laser driver system  the signal amplifying and shaping system  the data interface system. The hardware specified physical layer protocol is used to interface the outer data  serialize and deserialize the data stream  check transmission errors and schedule the data transmission. The overall system is a FIFO-like system and the user can use it as if he's operating a FIFO. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. Due to the complex composition and activity of the atmosphere  this signal channel brings in great influence on the transmitting laser in it  for example  the absorption and scattering of the atmosphere molecules and aerosols  the scintillation of received laser power caused by the turbulence of the atmosphere  all of which results in a much higher Bit Error Rate (BER) of the communication system than wired communication systems leading to frequent resynchronization. In our system  the sampling clock is generated locally using multi-phase sampling technique rather than PLLbased clock recovery  which helps to rapid synchronization. 2012 IEEE.  
Evaluation of the operating range for ground-based infrared imaging tracking system (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者:  Zhang Z.-D.
收藏  |  浏览/下载：49/0  |  提交时间：2013/03/25
Ground-based infrared imaging tracking system (GIITS) is of great importance for aerial target warning and guard. The operating range is one of the key performance specifications  on the other  which should be calculated  calculate the radiation power received on the detector in order to analysis whether the output signal meets the detection requirements or not  analyzed and studied during the whole GIITS design process. The operating range is mostly influenced by a few factors  without considering the effect of the background radiation. By improving of the traditional method  including atmospheric attenuation  a new operating range calculation model of the GIITS was established based on two requirements. One is that the image size of observed target should meet the requirement of the processor signal extraction. The number of the pixel occupied by target image should be more than 9. The other is that the signal noise ratio (SNR) of the GIITS should not be less than 5 to meet the requirements of the target detection probability and spatial frequency. The SNR calculation equation in form of energy is deduced and the radiation characteristic of the observed target and background are analyzed. When evaluate the operating range of the GIITS using the new method  the performance of GIITS and feature of target and background. This paper firstly makes analysis and summarization on the definite localizations of the traditional operating range equation of the GIITS. The localizations are mainly in two aspects. On one hand  we should successively calculate two operating range values according to two requirements mentioned above and choose the minimum value as the analytic result. In the end  the dispersion of the image and the effect of image dispersion are not considered in the traditional method  an evaluation of operating range for fighter aircraft is accomplished as an example. The influence factors in every aspect on operating range were explored by the calculated result. The new operating range calculation model provides the theoretical basis for the design and applications as well as the comprehensive evaluation of a GIITS. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).  
New phase measurement method for laser rangefinder (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者:  Meng Z.;  Meng Z.
收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25
A new phase measurement method is designed and presented by using the technique of signal shifting phase and the technique of signal multiplication for laser rangefinder. The intensity of laser light is modulated by cosine circuit signal  at the same time the cosine circuit signal is thansformed sine signal by the shifting phase technique. Two signals mentioned above are multiplied by received signal from the target respectively  then being transmitted into signal processor after passing through low band filter respectively. The result of phase-shift between the received signal and sent signal is calculated by means of signal processor and time-counter with double frequency of modulation signal. The proposed system is composed of four units such as control and count unit  emitting and receiving unit of laser light  signal processing unit and result display unit. The two most advantages of proposed system over others are its ability of proper isolation which reduces crosstalk and its independency thermal drift. Theoretical calculations and experimental results have shown the accuracy better than 2 mm. 2010 Copyright SPIE - The International Society for Optical Engineering.