2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)最新文献_第2页

Stand-alone GNSS time synchronization architecture 独立GNSS时间同步架构

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045142

T. Paakki, Francescantonio Della Rosa, J. Nurmi

引用次数: 0

Double phase estimator: New results 双相位估计器:新结果

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045138

D. Borio

引用次数: 6

An advanced technique to recover from BOC(1,1) false locks during the acquisition stage 在获取阶段从BOC(1,1)假锁中恢复的高级技术

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045153

L. Siniscalco, A. Emmanuele, Alessandro Ferrarlo, M. Puccitelli, S. Fantinato, P. Crosta, R. Weiler

{"title":"An advanced technique to recover from BOC(1,1) false locks during the acquisition stage","authors":"L. Siniscalco, A. Emmanuele, Alessandro Ferrarlo, M. Puccitelli, S. Fantinato, P. Crosta, R. Weiler","doi":"10.1109/NAVITEC.2014.7045153","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045153","url":null,"abstract":"This paper investigates a novel algorithm based on the Bump and Jump technique, capable of detecting and recovering from possible false lock events during the acquisition stage of BOC(1,1) Signals. Indeed the traditional Bump and Jump technique might lead to a false lock, in particular in harsh scenarios affected by strong multipath. Concerning this undesired event, an analysis of False Lock probability is provided to assess the goodness of the new approach w.r.t. the traditional Bump and Jump algorithm. The new algorithm is compared to the classical one, providing statistics on the False Locks occurrence after the Transition to Tracking stage, given the probability density function of the coarse delays estimated in the Acquisition stage. This analysis has been extensively assessed by means of a semi-analytic MATLAB™ simulator, representative of the Acquisition and Transition to Tracking stages of a GNSS Ground Receiver. Two different multipath models have been considered applicable to the Reference Stations context: the two rays ground multipath and diffuse multipath. A preliminary assessment with a GNSS signals simulator and a receiver prototype are also included so as to demonstrate the applicability of the software simulation results to both Bump and Jump methods.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125547909","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}

引用次数: 0

Validation of a signal quality monitoring technique over a set of spoofed scenarios 在一组欺骗场景中验证信号质量监测技术

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045136

Esteban Garbin Manfredini, F. Dovis, B. Motella

{"title":"Validation of a signal quality monitoring technique over a set of spoofed scenarios","authors":"Esteban Garbin Manfredini, F. Dovis, B. Motella","doi":"10.1109/NAVITEC.2014.7045136","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045136","url":null,"abstract":"Since the early years of the operational capability of the Global Positioning Systems for civil purposes, the security aspects related to the use of the signals have always been a reason of concern. Nevretheless, jamming and spoofing of signals have always been seen as hard to implement due to the requires advanced skills for the design and the high cost of the equipment needed. Nowadays, with the advances in technology have brought to the attention that such threats to GNSS receivers are indeed more feasible. This paper deals, then with a low-complexity signal processing algorithm, named in literature a Signal Quality Monitoring Technique, testing its capabilities in realistic spoofed scenarios. Such a technique is based on the measurements of the correlation function peak quality as well as on the joint use of a pair of extra-correlators in order to detect vestigial signal presence. The work presented in this paper aims at validating the performance of the technique as an anti-spoofing method. The assessment was performed using a set of scenarios, named Texas Spoofing Test Battery (TEXBAT), which is provided by the Radionavigation Laboratory of the University of Texas at Austin.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114786423","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}

引用次数: 29

Performance comparison of a KF-based and a KF+VDFLL vector tracking-loop in case of GNSS partial outage and low-dynamic conditions 基于KF和KF+ vdll矢量跟踪环在GNSS部分中断和低动态条件下的性能比较

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045135

Xinhua Tang, Gianluca Falco, E. Falletti, L. Presti

{"title":"Performance comparison of a KF-based and a KF+VDFLL vector tracking-loop in case of GNSS partial outage and low-dynamic conditions","authors":"Xinhua Tang, Gianluca Falco, E. Falletti, L. Presti","doi":"10.1109/NAVITEC.2014.7045135","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045135","url":null,"abstract":"New GNSS tracking architectures are becoming of scientific interest since the last decade. The traditional DLL/PLL tracking-loops have been progressively substituted by KF/EKF scalar tracking and VDLL/VDFLL vector tracking methods. In this paper we will analyze in depth the performance of a KF scalar tracking and VDFLL vector in case of signal outage. Differently from papers on the same topic, we will show how the performance of a KF, when used within the tracking stage during a signal's blockage, are strongly dependent on a proper setting of the noise covariance matrices Q and P of the system, otherwise cases of frequency false-lock can occur when the outage condition lasts for a long time. Conversely, a VDFLL vector tracking algorithm is able to provide more precise frequency and code-phase's estimations then the KF scalar in case of signal's unavailability, but its performance relies on the navigation solution. Therefore, the effects of the PVT accuracy on the estimation of the main tracking parameters are also presented in this paper.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121175009","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}

引用次数: 13

JamCam: A camera-integrated GNSS receiver for spatial detection of radio frequency interference sources JamCam:一种集成了摄像头的GNSS接收器，用于射频干扰源的空间探测

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045134

L. Kurz, E. Tasdemir, T. Noll

{"title":"JamCam: A camera-integrated GNSS receiver for spatial detection of radio frequency interference sources","authors":"L. Kurz, E. Tasdemir, T. Noll","doi":"10.1109/NAVITEC.2014.7045134","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045134","url":null,"abstract":"This paper presents a Global Navigation Satellite System (GNSS) array-antenna receiver which is capable of generating source-maps of Radio Frequency Interference (RFI) to be superimposed to real-world pictures obtained from a camera. The principle is similar to the acoustic camera which is used for localization of acoustic noise sources in an image or a video sequence. Source-map generation is generally based on Direction-of-Arrival (DoA)-estimation techniques. In case of the GNSS-receiver, the Multiple Signal Identification and Classification (MUSIC) technique has been adopted for spectral DoA-estimation. Amplitudes in the spectrum indicate the DoA of RFI-sources depending on azimuth and elevation angles in the hemisphere above the array-antenna. These coordinates are transferred into cartesian image coordinates and an overlay image is generated with colors reflecting the shape of the spectrum. Afterwards, this image is superimposed to a grayscale picture obtained from the camera and RFI-sources can be visualized in the image. In this context, the paper addresses issues for online calibration of the array-antenna and static calibration of the camera. An Field Programmable Gate Array (FPGA)-based demonstrator is presented and first results from testing the receiver in real-time in an anechoic chamber are discussed.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116321265","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}

引用次数: 1

Estimation of the GPS to Galileo time offset and its validation on a mass market receiver GPS对伽利略时间偏移的估计及其在大众市场接收机上的验证

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045145

C. Gioia, J. Fortuny-Guasch, F. Pisoni

{"title":"Estimation of the GPS to Galileo time offset and its validation on a mass market receiver","authors":"C. Gioia, J. Fortuny-Guasch, F. Pisoni","doi":"10.1109/NAVITEC.2014.7045145","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045145","url":null,"abstract":"The European GNSS, Galileo is currently in its In-Orbit Validation (IOV) phase where four satellites are available for computing the user position. Galileo El OS and GPS C/A represent a very effective constellation pair in a consumer grade receiver: the signals are conveyed on the same analog path and measurements can be combined in a single position, velocity and time (PVT) solution, provided that the Galileo to GPS Time Offset (GGTO) is available. Algorithms for GGTO estimation are presented in this paper, including a real-time implementation on a compact hardware receiver, based on the Teseo-II chipset. Experimental results are provided, showing the benefit in terms of accuracy and availability of the Galileo plus GPS multi-constellation solution respect to the GPS only case. Also analyzed are the effects on the GGTO estimate of different ionospheric models, namely: GPS Klobuchar and Galileo NeQuick. Both simulated scenarios and real, recorded Galileo IOV samples from a roof antenna are used in the validation of the proposed algorithms.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496078","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}

引用次数: 11

Subcarrier slip detection for high-order BOC signals 高阶BOC信号的副载波滑移检测

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045152

M. Navarro-Gallardo†, G. López-Risueño, J. García-Molina, M. Crisci, G. Seco-Granados

{"title":"Subcarrier slip detection for high-order BOC signals","authors":"M. Navarro-Gallardo†, G. López-Risueño, J. García-Molina, M. Crisci, G. Seco-Granados","doi":"10.1109/NAVITEC.2014.7045152","DOIUrl":"https://doi.org/10.1109/NAVITEC.2014.7045152","url":null,"abstract":"The most recent generation of Global Navigation Satellite Systems (GNSS) are implementing Binary Offset Carrier (BOC) modulation. The advantage of BOC signals is that the main lobe of the correlation is very narrow, but on the other hand, they present side peaks, i.e. multiple stable tracking points. For high-order BOC signals, the amplitude of the side peaks can be similar to the amplitude of the main one or even exceed it under specific scenarios. Some techniques to mitigate the code ambiguity exploit the fact that BOC signals can be understood as the sum of two BPSK signals. Therefore, BOC signals are composed by three components: the code, the subcarrier and the carrier. Code gives unambiguous but noisy measures, whereas that the subcarrier tracking gives ambiguous but precise measurements. The technique presented in this paper solves the ambiguity combining these two delays: the same principle as the carrier smoothing techniques is exploited. Additional, a new subcarrier slip detector is presented in order to detect the subcarrier slips and reset the code smoothing. This paper is focused on high-order BOC signals as the BOC(15,2.5) present in the European Galileo System. The performance of the new algorithm has been evaluated though several simulations using the DLR channel model and other synthetic scenarios.","PeriodicalId":254397,"journal":{"name":"2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129128530","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}

引用次数: 2

Detection and mitigation of interference in the calibration of high gain antennas for GNSS GNSS高增益天线校准中的干扰检测与缓解

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045154

P. Martinelli, S. Thoelert, J. Furthner

引用次数: 0

Performance comparison of a VDFLL versus VDLL and scalar GNSS receiver architectures in harsh scenarios VDLL与VDLL和标量GNSS接收机架构在恶劣场景下的性能比较

2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2014-12-01 DOI: 10.1109/NAVITEC.2014.7045140

F. Sousa, F. Nunes

引用次数: 7