2017 Forum on Cooperative Positioning and Service (CPGPS）最新文献

{"title":"An unconventional GPS and multiple low-cost IMU integration strategy with individual model for systematic errors and measurements","authors":"Fei Yu, Minghong Zhu, J. Wang, Shu Xiao","doi":"10.1109/CPGPS.2017.8075099","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075099","url":null,"abstract":"Conventionally, the Kalman filter on the basis of integration mechanization of GPS-aided inertial integrated navigation system has been commonly built up using error states and error measurements. Wang et al. [2015] and Qian et al. [2015, 2016] developed an unconventional KF that directly estimates navigational parameters instead of the error states, in which a kinematic trajectory model as the KF system model was deployed and measurement updates for all sensor data inclusive of the ones from IMUs were directly performed. This research applies the above mentioned novel multisensor integration strategy to integrate GPS receiver and multiple low-cost IMUs so that the systematic errors and measurements of these IMUs can be individually modeled in the navigation Kalman filter, instead of being a group of the commonly shared states for all of the IMUs. Experiments and simulations were tested to show the practicability of the proposed integrated navigation strategy.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126520730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Noise correlation in the time series of GPS stations in the North China Plain","authors":"Jun Ma, Boye Zhou","doi":"10.1109/CPGPS.2017.8075120","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075120","url":null,"abstract":"A total of 20 stations in the North China Plain were selected. The noise variances of each station were estimated by the least squares variance component estimation method under the combination of white noise and flicker noise. The noise variances are composed of the white noise and flicker noise vectors of different components. The correlations among the different component noise vectors were then analyzed by univariate linear regression, and the regression equations were established. Results show that a moderate correlation exists among the white noise vectors in each station direction, especially a high correlation degree exists among the horizontal components. The flicker noise vector only has a moderate correlation among the horizontal directions. A change in one noise direction for the two correlated noise vectors can explain the more than 60% noise change in the other direction.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123810915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-frequency BeiDou cycle slip and data gap repair with geometry-based model","authors":"Yanan Qin, Bofeng Li, L. Lou","doi":"10.1109/CPGPS.2017.8075134","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075134","url":null,"abstract":"In real GNSS high-precision applications with carrier phase observations, the cycle slips and short-time interruptions often occur, leading to a long time re-initialization. The traditional methods often process cycle slips of satellite-by-satellite based on the geometry-free combinations of multiple frequencies. The geometry-free model ignores the mutual strong links between different satellite observations, which degrades the efficiency of cycle slip processing. With gradual availability of multi-frequency GNSS, the correlations of observations between multi-frequency and between satellites should be taken full advantage of. In this contribution, we will dedicate to present a geometry-based and ionosphere-weighted approach for integer cycle slip estimation, along with handling of receiver coordinate parameters, receiver clock error and ionospheric delays, which is generally applicable to arbitrary number of frequencies of CDMA satellite systems. When it is unable to effectively fix all of the cycle slips simultaneously, we further propose to partially fix the cycle slips that can be reliably fixed. Extensive experiments are carried out using undifferenced dual/triple-frequency BDS data to validate the performance of our proposed method. The result shows that by using the predicted ionospheric variations, the data gaps up to 30–45 s can be effectively connected, and the cycle slips can be correctly fixed even in case of the poor situations where continuous cycle slips occur on all satellites.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133470710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on indoor pedestrian location based on miniature inertial measurement unit","authors":"Guo Zheng, Wang Qiuying, Z. Minghui","doi":"10.1109/CPGPS.2017.8075141","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075141","url":null,"abstract":"In order to solve the problem that the indoor pedestrian navigation cannot receive the GPS signal, the inertial navigation and positioning technology, which does not rely on any external equipment or a priori database, is a more reliable method. The inertial navigation system can calculate the position, velocity and attitude information by collecting the acceleration and angular velocity information. On the basis of it we introduce zero speed correction, when the system detects pedestrians at zero speed state, namely the foot meets the ground, the Kalman filter algorithm is triggered and the state of the system is corrected to eliminate the errors of SINS. In the indoor environment, experiments were carried out for different walking routes. The simulation results show that the positioning accuracy of the navigation algorithm with zero velocity correction is improved obviously.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"59 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133651143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The application of MEMS GPS receiver in APOD precise orbit determination","authors":"Cao Jianfeng, Man Haijun, Li Xie, Tang Ge-shi, Liu Shushi","doi":"10.1109/CPGPS.2017.8075112","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075112","url":null,"abstract":"APOD is a Nano satellite manufactured by DFH co., and carries dual-frequency GNSS (GPS/BD) receiver, density detector, SLR reflector and VLBI beacon. In this paper, the inflight performance of the MEMS GPS receiver has been assessed, including the multi-channel satellite ability and orbital accuracy. The average number of tracking GPS satellites for dual-frequency is only 5 due to the low tracking ability of L2 frequency. The mean RMS of ionosphere-free combination carrier phase is approximately 1–2 cm. The routine orbit determination with 36 hours tracking data has been performed using NPOD, the orbital accuracy is assessed by overlap comparison and SLR validation. The results show that the orbital accuracy is better than 20cm in three dimensions in most cases, which is helpful for the study of atmosphere density.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114422492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A high resolution time-reversal based approach for indoor localization using commodity WiFi devices","authors":"Lili Zheng, Binjie Hu, Hao-Xiang Chen","doi":"10.1109/CPGPS.2017.8075143","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075143","url":null,"abstract":"We study the effect of multipath component and bandwidth on the performance of the existing time-reversal(TR) based fingerprinting localization approaches. We find that localization accuracy of these approaches deteriorates with limited bandwidth. To improve the localization performance, we propose a high resolution time reversal approach, i.e., TR-Phase, through jointly considering two unique location-specified signatures extracted from channel state information. Experimental results are presented to confirm that the proposed approach can efficiently mitigate accuracy deterioration with limited bandwidth and consequently achieve higher resolution compared with the existing TR localization approaches.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125564084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polar motion prediction based on adaptive filtering of variable forgetting factor","authors":"S. Jia, Tianhe Xu, Honglei Yang","doi":"10.1109/CPGPS.2017.8075133","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075133","url":null,"abstract":"The Polar Motion (PM) is the important parameter of Earth Rotation Parameters (ERP), and the high-precision prediction of PM plays a key role in the applications of autonomous orbit determination, the geodetic survey, navigation and aviation. In this paper, a modified algorithm is proposed to improve the PM prediction accuracy based on combination of Least Square and Autoregressive Model (LS+AR). An adaptive filtering of variable forgetting factor is developed to amend the LS fitting terms and predict extrapolations, which is named LS+AR+AF algorithm. The numerical results show that LS+AR+AF algorithm can significantly enhance the prediction accuracy of PM, especially for the long-term perdition. The accuracy improvement of 360-day prediction for PM X component, PM Y component and total PM can reach 30.66%, 28.19% and 29.59% respectively, when using LS+AR+AF algorithm.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128004295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GNSS for real-time monitoring of bridge dynamic responses","authors":"Boxiao Ju, R. Xi, Qusen Chen, Xiaolin Meng, Weiping Jiang, Wenlan Fan","doi":"10.1109/CPGPS.2017.8075121","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075121","url":null,"abstract":"Global Navigation Satellite Systems (GNSS) Realtime Kinematic (RTK) positioning technique has been widely used for the structural health monitoring (SHM) of different structures in the past two decades. Through post processing and analysis, it has been demonstrated that the displacements and natural frequencies identified with GNSS data are highly consistent with those obtained by using a finite element (FE) model. However, structural health monitoring needs to measure all spectrum of the dynamic responses of bridges such as deformations, natural frequencies, damping, etc. in real-time in order to support the timely decision making for the bridge operation and maintenance, particularly under extreme loading conditions caused by busy traffic, severe wind or even earthquake etc. This paper proposes a new quasi real time time-frequency analysis strategy based on the Fast Fourier Transform (FFT). With the support of the European Space Agency (ESA) and the University of Nottingham in the UK, one week of real-life GNSS data gathered from the Forth Road Bridge in Scotland has been used since the traffic loading has an approximate repetition period of one week from the weekdays to weekend. Firstly, the approximate frequency distribution is achieved by using the whole date set. Then a sliding window method is proposed to simulate a quasi real time mode for the time-frequency analysis, and a set of experiments are carried out to decide the optimal window length and the overlapped sliding step, through which the natural frequencies and relevant deformation amplitudes can be calculated at the same time. Finally, the results show that the natural frequencies calculated by FFT are quite stable which indicates the frequency responses are not sensitive enough to the changing loadings. However, the relevant amplitude time series of each frequency can clearly display the influence caused by different kinds of loading respectively, such as vehicles and wind etc., which would be a reliable indicator of bridge dynamic responses to assess the structural health conditions in the future.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121472912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on application status and standard system of BDS in transportation","authors":"W. Xiaodong, Wang Xun, Lu Hongyang, L. Jing","doi":"10.1109/CPGPS.2017.8075118","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075118","url":null,"abstract":"Global navigation satellite system (GNSS) has been widely used in different fields of transportation, including transportation supervision, security responses, highway construction and administration as well as waterway construction and administration. Over the past 5 years, breakthroughs have been achieved in the typical application fields of BeiDou navigation satellite system (BDS) such as dynamic safety supervision for road transport, vessel monitoring and management and security responses with the growing demands for applying BDS in national demonstration projects. To standardize and improve the quality of GNSS application service in transportation, the Ministry of Transport of the People's Republic of China has established related standards for GNSS applications. However, problems such as too narrow coverage, repeated formulation, varying quality and difficulties in coordination have appeared owing to the lack of top-down designs and plans as the development of the transportation informatization. In this paper, transportation application standard System of BDS is proposed to guide the formulation of BDS application standards in transportation by comprehensively considering the transportation application requirements and a systematic summary of the status of GNSS application standards in transportation.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134227376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Method of the GPS/BDS/GLO/GAL integrated positioning based on DCB correction","authors":"Pan Shuguo, Wang Denghui, Zhao Jue","doi":"10.1109/CPGPS.2017.8075114","DOIUrl":"https://doi.org/10.1109/CPGPS.2017.8075114","url":null,"abstract":"With the development of the four global navigation satellite systems(GNSS), the integrated positioning of four GNSS has become future development trend. A combined positioning algorithmusing four system data with weighted measurement fusionis developed in the paper. Using DCB data provided by IGS, the satellite clock error was corrected for each code. The four GNSS positioning accuracy was analyzed with DCB correction and the influence of setting different PDOP thresholdon positioning accuracy was verified in the conditions of guaranteeing the accuracy. The results showed that the reasonable PDOP threshold should be consideredin the positioning model to improve the positioning accuracy and continuity. And using DCB correction, the RMS of N direction and E direction was obviouslyimproved.","PeriodicalId":340067,"journal":{"name":"2017 Forum on Cooperative Positioning and Service (CPGPS）","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133933782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}