检索结果-南通市图书馆

A novel particle filter approach for indoor positioning by fusing WiFi and inertial sensors

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2015年第6期28卷 1725-1734页

作者： Zhu Nan Zhao Hongbo Feng Wenquan wang zulin School of Electronics and Information Engineering Beihang University

WiFi fingerprinting is the method of recording WiFi signal strength from access points （AP） along with the positions at which they were recorded, and later matching those to new mea- surements for indoor positioning. Inertial positioning utilizes the accelerometer and gyroscopes for pedestrian positioning. However, both methods have their limitations, such as the WiFi fluctuations and the accumulative error of inertial sensors. Usually, the filtering method is used for integrating the two approaches to achieve better location accuracy. In the real environments, especially in the indoor field, the APs could be sparse and short range. To overcome the limitations, a novel particle filter approach based on Rao Blackwellized particle filter （RBPF） is presented in this paper. The indoor environment is divided into several local maps, which are assumed to be independent of each other. The local areas are estimated by the local particle filter, whereas the global areas are com- bined by the global particle filter. The algorithm has been investigated by real field trials using a WiFi tablet on hand with an inertial sensor on foot. It could be concluded that the proposed method reduces the complexity of the positioning algorithm obviously, as well as offers a significant improvement in position accuracy compared to other conventional algorithms, allowing indoor positioning error below 1.2 m.

关键词： Fusion algorithm Indoor positioning Inertial sensor Rao Blackwellized par ticle filter WiFi fingerprinting

FEC design for remote control and data transmission of aeronautic and astronautic vehicles

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2019年第1期32卷 159-166页

作者： Qin HUANG Mingxu ZHANG zulin wang Xuanwei ZHANG School of Electronic and Information Engineering Beihang University Collaborative Innovation Center of Geospatial Technology

This paper focuses on the advanced Forward Error Correction(FEC) based on LowDensity Parity-Check(LDPC) codes for remote control and data transmission of Aeronautic and Astronautic Vehicles(AAV). It shows that the nontransparent LDPC codes with odd row weights are able to resist phase inversion with a small computational overhead. To the best of our knowledge, it is the first time to use FEC to resist phase inversion. Then, a high hardware-efficient FEC design for AAV, which is capable of correcting random errors as well as phase inversion, is proposed based on circulant decomposition with circulant size of 2s. Such a(4096, 2048) LDPC code has been adopted in a data transmission system due to its excellent error performance and hardware efficiency.

关键词： Circulant decomposition FEC High efficiency LDPC Nontransparent

A Novel Deep Learning Method for Application Identification in Wireless Network

在线全文

学校读者我要写书评

暂无评论

China Communications 2018年第10期15卷 73-83页

作者： Jie Ren zulin wang School of Electronic and Information Engineering Beihang University Beijing 100191 China Collaborative Innovation Center of Geospatial Technology Wuhan 430079 China

In modern wireless communication network, the increased consumer demands for multi-type applications and high quality services have become a prominent trend, and put considerable pressure on the wireless network. In that case, the Quality of Experience(Qo E) has received much attention and has become a key performance measurement for the application and service. In order to meet the users' expectations, the management of the resource is crucial in wireless network, especially the Qo E based resource allocation. One of the effective way for resource allocation management is accurate application identification. In this paper, we propose a novel deep learning based method for application identification. We first analyse the requirement of managing Qo E for wireless communication, and review the limitation of the traditional identification methods. After that, a deep learning based method is proposed for automatically extracting the features and identifying the type of application. The proposed method is evaluated by using the practical wireless traffic data, and the experiments verify the effectiveness of our method.

关键词： quality of experience application identification protocol identification deeplearning feature extraction

Low Complexity SOVA for Turbo Codes

在线全文

学校读者我要写书评

暂无评论

China Communications 2017年第8期14卷 33-40页

作者： Ruilin Pei zulin wang Qin Huang Jiaqing wang School of Electronic and Information Engineering Beihang UniversityBeijing100191China Collaborative Innovation Center of Geospatial Technology Wuhan430079China State Key Laboratory of Wireless Mobile Communications(CATT) Beijing100191China

Recently, trimming Soft-output Viterbi algorithm(T-SOVA) has been proposed to reduce the complexity of SOVA for Turbo codes. In its fi rst stage, a dynamic algorithm, lazy Viterbi algorithm, is used to indicate the minimal metric differences which brings obstacle on hardware implementation. This paper proposes a Viterbi algorithm(VA) based T-SOVA to facilitate hardware implementation. In the first stage of our scheme, a modified VA with regular structure is used to fi nd the maximum likelihood(ML) path and calculate the metric differences. Further, local sorting is introduced to trim the metric differences, which reduces the complexity of trimming operation. Simulation results and complexity analysis show that VA based T-SOVA performs as well as lazy VA based T-SOVA and is easier to be applied to hardware implementation.

关键词： VA SOVA local sorting hardware implementation

党建引领、思创融合:地方高校创新创业教育模式构建与实施策略

在线全文

学校读者我要写书评

暂无评论

高教论坛 2024年第1期 96-100页

作者：李亚娟王祖林马小龙桂林理工大学广西桂林541004

党建、思政与创新创业教育的融合是高质量发展背景下地方高校创新创业教育发展的趋势,即在党建工作的组织保障下,在思政教育的价值指导下,充分调动教育资源,通过系统改革增强创新创业教育实效性,推动高素质创新创业人才与区域经济社会... 详细信息

党建、思政与创新创业教育的融合是高质量发展背景下地方高校创新创业教育发展的趋势,即在党建工作的组织保障下,在思政教育的价值指导下,充分调动教育资源,通过系统改革增强创新创业教育实效性,推动高素质创新创业人才与区域经济社会的良性互动.地方高校党建引领、思创融合的创新创业教育模式的重点在于以活动化思想引领嵌入思想及价值观因子、以信息化课程教学嵌入理论及实践教学因子、以平台化项目孵化嵌入项目落地因子、以协同化组织保障嵌入组织保障因子,形成因子协同力,创建可持续发展的创新创业教育生态.

关键词：创新创业党建引领思创融合实施策略

全面质量管理视角下地方理工科高校本科教学质量保障策略探究

在线全文

学校读者我要写书评

暂无评论

高教论坛 2024年第9期 74-78页

作者：罗盛锋王祖林周焕福桂林理工大学广西桂林541004

地方理工科高校具有地方、理工之双重特征,其本科教学质量保障具有不同于其他类型高校的价值追求。在全面质量管理视角下,地方理工科高校本科教学质量保障要兼顾教学的学生中心与产出导向,在主体层次需要利益相关者协同共促教学成效,在... 详细信息

地方理工科高校具有地方、理工之双重特征,其本科教学质量保障具有不同于其他类型高校的价值追求。在全面质量管理视角下,地方理工科高校本科教学质量保障要兼顾教学的学生中心与产出导向,在主体层次需要利益相关者协同共促教学成效,在标准层次需要结合国家要求形成地方办学特色,在行动层次需要建立持续改进的质量保障机制。当前,我国地方理工科高校本科教学质量保障实践存在教学质量保障主体单一、教学质量保障标准同质、教学质量保障行动离散等问题。为提升教学质量、增强人才培养实效,地方理工科高校需明确“素养为本-产出导向”的理念,践行全员、全方位、全过程的教学质量保障,以实现“教师-学生-社会”的多方协同,整合“国家-地方-学校”发展要求,推进“评价-反馈-改进”逻辑闭环。

关键词：全面质量管理地方理工科高校本科教学质量保障

在线全文

学校读者我要写书评

暂无评论

基于关联性的卫星通信网链路故障自主识别

华中科技大学学报（自然科学版） 2014年第3期42卷 10-13页

作者：张小娟王祖林北京航空航天大学电子信息工程学院北京100191

针对传统的网络链路故障识别方法往往需要人工参与、准确性有限的不足,提出了一种网络元素关联性的卫星通信网链路故障自主识别算法.该方法通过建立卫星网故障链路识别模型(FLIG),管理节点能够自主地、实时地检测出最可能出现故障的链路... 详细信息

针对传统的网络链路故障识别方法往往需要人工参与、准确性有限的不足,提出了一种网络元素关联性的卫星通信网链路故障自主识别算法.该方法通过建立卫星网故障链路识别模型(FLIG),管理节点能够自主地、实时地检测出最可能出现故障的链路.利用该算法对示例网络链路故障进行了分析,并且与经典的非关联性的故障识别方法进行了对比.实验结果表明:所提出的算法考虑网络元素故障之间的作用,结果精确并具有实时性.

关键词：卫星网络故障链路依赖性故障故障识别自主性

Dual-channel Method for Fast Long PN-code Acquisition

在线全文

学校读者我要写书评

暂无评论

China Communications 2014年第5期11卷 60-70页

作者： FENG Wenquan XING Xiaodi ZHAO Qi wang zulin School of Electronic and Information Engineering Beihang University Haidian 100191 Beijing P. R. China

Long PN-code acquisition is a difficult and time-consuming task due to long code *** accelerate acquisition,folding methods like XFAST are widely *** highdynamic environment however,the application of those methods are largely restricted due to nonnegligible residual *** paper proposes a new dual-channel method for fast acquisition of long *** the proposed method,both non-overlapping local PNcode blocks are employed to correlate with input sample block;the detection process is eased through finding the maximum value among correlation results and verification is made with all the full and partial peaks taken into *** alarm probabilities from analysis of the verification process are *** theoretical and Monte Carlo simulations reveal that,with respect to acquisition probability and mean acquisition time under the same false alarm rate,dual-channel method has advantage over zero-padding and XFAST based folding methods under certain false alarm probabilities.

关键词： spread spectrum long PN-code code acquisition detection probability

在线全文

学校读者我要写书评

暂无评论

小波分析理论及其在雷达信号处理中的应用

北京航空航天大学学报 1999年第2期25卷 130-133页

作者：王祖林周荫清北京航空航天大学电子工程系

依据所处理信号类型的不同，对小波变换与短时傅立叶变换进行了比较，说明小波变换适用于非平稳信号和奇异信号的处理．简要介绍了连续小波变换、离散小波变换和小波包理论的基本内容，讨论了小波变换实际应用中的采样和快速算法等几个... 详细信息

依据所处理信号类型的不同，对小波变换与短时傅立叶变换进行了比较，说明小波变换适用于非平稳信号和奇异信号的处理．简要介绍了连续小波变换、离散小波变换和小波包理论的基本内容，讨论了小波变换实际应用中的采样和快速算法等几个关键问题．结合矢量量化技术，给出了一种用小波变换对星载ＳＡＲ（ＳｙｎｔｈｅｔｉｃＡｐｅｒｔｕｒｅＲａｄａｒ）原始数据进行压缩的方法，结果表明，与传统的方法相比，由该方法压缩后的原始数据生成的ＳＡＲ图像具有更大的信噪比．

关键词：傅里叶变换数据压缩雷达信号小波变换