2013 International Conference on Localization and GNSS (ICL-GNSS)最新文献

Testing the test satellites: the Galileo IOV measurement accuracy 测试测试卫星:伽利略IOV测量精度

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577253

A. Angrisano, S. Gaglione, C. Gioia, D. Borio, J. Fortuny-Guasch

引用次数: 17

Code smoothing for BOC ambiguity mitigation 用于减轻BOC歧义的代码平滑

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577260

Moises Navarro Gallardo, G. Seco-Granados, G. López-Risueño, M. Crisci

{"title":"Code smoothing for BOC ambiguity mitigation","authors":"Moises Navarro Gallardo, G. Seco-Granados, G. López-Risueño, M. Crisci","doi":"10.1109/ICL-GNSS.2013.6577260","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577260","url":null,"abstract":"The most recent generation of Global Navigation Satellite Systems (GNSS) are implementing Binary Offset Carrier (BOC) modulation. These signals are expected to provide not only better precision in the estimation of the signal's delay and phase but also more robustness to multipath effects. The advantage of BOC signals is that the main lobe of the correlation is very narrow, but on the other hand they present side lobes. For high-order signals, the amplitude of the side lobes 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. Even though these techniques achieve their objective, they lose the robustness against multipath and increase the tracking noise. This paper presents a new combination between the time delay estimated by these kind of techniques and the time delay estimated using the full BOC. The idea of the combination is the same as the carrier smoothing but instead of using the carrier measurement, two code measurements are combined. Since the delay introduced by the ionosphere is the same, or very close, using the Full-BOC and the two-BPSK techniques, as it will be shown in this paper, the smoothing time can be large values, compared with the common carrier smoothing time. Several simulations of the new code smoothing strategy for different scenarios are presented in this paper.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"10 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114011769","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: 15

Localization of unknown indoor wireless transmitter 未知室内无线发射机定位

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577270

Mohd Amiruddin Abd Rahman, M. Dashti, Jie Zhang

{"title":"Localization of unknown indoor wireless transmitter","authors":"Mohd Amiruddin Abd Rahman, M. Dashti, Jie Zhang","doi":"10.1109/ICL-GNSS.2013.6577270","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577270","url":null,"abstract":"Many management tasks, for instance optimizing placement of a new Wi-Fi or femtocell access points (AP), or detecting unauthorized transmitter (Tx), requires the ability to locate individual Tx inside buildings. Available techniques to locate Txs require extensive war driving measurements and significant computations, or complex and additional hardware. This paper presents a time-efficient method, based on only collected received signal strength (RSS) data to estimate the location of unknown Tx installed inside a multi-storey building. Three-stage algorithm is proposed. Firstly, the building's location from which the signal is transmitted from, is defined on the area map. Secondly, the floor level of the determined building on which the unknown Tx is installed, is determined. Finally, 2-dimensional location coordinates of Tx and the path loss parameters are jointly estimated. The method is evaluated using realistic simulated data obtained from iBuildNet® wireless network design and optimization tool developed by Ranplan. The simulation results confirm that developed algorithm works accurately and is especially helpful to locate an unknown Tx in changing and unknown environments.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116168646","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: 12

Frequency-domain code replica detection for a GNSS receiver GNSS接收机的频域代码副本检测

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577266

J. M. Parro-Jimenez, J. López-Salcedo, R. Ioannides, M. Crisci

引用次数: 3

Statistical test applied to detect distortions of GNSS signals 用于检测GNSS信号失真的统计检验

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577267

M. Gamba, B. Motella, M. Pini

{"title":"Statistical test applied to detect distortions of GNSS signals","authors":"M. Gamba, B. Motella, M. Pini","doi":"10.1109/ICL-GNSS.2013.6577267","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577267","url":null,"abstract":"The extremely low power of Global Navigation Satellite System (GNSS) signals makes them vulnerable to disturbances and interference from external sources. These induce distortions on the correlation function that reflect upon a degraded pseudoranges measurement and poor positioning accuracy. On the other hand, the wide spread use of GNSS receivers in critical applications demands for improved performance in terms of positioning accuracy and integrity. This paper proposes a new algorithm based on the statistical testing of post-correlation measurements to detect signal distortions and to prevent degradations in the receiver positioning performance. The application of statistical tests to GNSS is not yet deeply investigated, but some recent works already show good performance when Goodness of Fit (GoF) tests are applied to raw signal samples to detect interference. The paper presents a quality monitoring algorithm, based on the application of a statistical testing, known as sign test, applied to the post correlation stage of a GNSS receiver. Promising results are obtained to detect distortions in the correlation shape, for two different harsh environments, i.e., with the presence of interference sources and under a spoofing attack. The main advantages of the proposed method are the low complexity, the indipendence from the type of disturbance and the possibility of its application to any GNSS modulation.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127493762","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: 23

Recent results in receiving and decoding signals from the Beidou system 接收和解码北斗系统信号的最新成果

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577255

D. Truong, Trung Tran, T. D. Nguyen, T. H. Ta

引用次数: 4

Modeling Received Signal Strength measurements for cellular network based positioning 基于蜂窝网络定位的接收信号强度测量建模

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577278

J. Talvitie, E. Lohan

{"title":"Modeling Received Signal Strength measurements for cellular network based positioning","authors":"J. Talvitie, E. Lohan","doi":"10.1109/ICL-GNSS.2013.6577278","DOIUrl":"https://doi.org/10.1109/ICL-GNSS.2013.6577278","url":null,"abstract":"This paper introduces a novel approach to model Received Signal Strength (RSS) measurements in cellular networks for user positioning needs. The RSS measurements are simulated by constructing a synthetic statistical cellular network, based on empirical data collected from a real life network. These statistics include conventional path loss model parameters, shadowing phenomenon including spatial correlation, and probabilities describing how many cell identities are measured at a time. The performance of user terminal positioning in the synthetic model is compared with real life measurement scenario by using a fingerprinting based K-nearest neighbor algorithm. It is shown that the obtained position error distributions match well with each other. The main advantage of the introduced network design is the possibility to study the performance of various position algorithms without requiring extensive measurement campaigns. In particular the model is useful in dimensioning different radio environment scenarios and support in preplanning of measurement campaigns. In addition, repeating the modeling process with different random values, it is possible to study uncommon occurrences in the system which would be difficult to reveal with limited real life measurement sets.","PeriodicalId":113867,"journal":{"name":"2013 International Conference on Localization and GNSS (ICL-GNSS)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123792872","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: 15

Advantages of C-band and L-band atmospheric remote sensing c波段和l波段大气遥感的优势

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577280

Stefan Junker, T. Schüler

引用次数: 0

Impact of the group delay on BOC(M,N) tracking: Potential filter issues in robust side-lobe switching for high-order BOC modulations 群延迟对BOC(M,N)跟踪的影响:高阶BOC调制鲁棒旁瓣切换中的潜在滤波器问题

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577269

D. Margaria, E. Falletti, A. Bagnasco, F. Parizzi, Augusto Torchi

引用次数: 3

GNSS Reflectometry as a tool to retrieve soil moisture and vegetation biomass: Experimental and theoretical activities GNSS反射测量作为检索土壤水分和植被生物量的工具:实验和理论活动

2013 International Conference on Localization and GNSS (ICL-GNSS) Pub Date : 2013-06-25 DOI: 10.1109/ICL-GNSS.2013.6577282

N. Pierdicca, L. Guerriero, M. Caparrini, A. Egido, S. Paloscia, E. Santi, N. Floury

引用次数: 5