2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)最新文献

A simplified convolutional decoder for galileo os: performance evaluation with a galileo mass-market receiver in live scenario 用于galileo os的简化卷积解码器:在实时场景中使用galileo大众市场接收机进行性能评估

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849358

P. Crosta, G. Pirazzi

{"title":"A simplified convolutional decoder for galileo os: performance evaluation with a galileo mass-market receiver in live scenario","authors":"P. Crosta, G. Pirazzi","doi":"10.1109/NAVITEC.2016.7849358","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849358","url":null,"abstract":"The Galileo E1 Open Service signal broadcasts a navigation message containing 120 bits of information per page on the signal component E1B. This raw navigation message is ½ convolutional encoded with a Forward Error Correcting (FEC) Code. The encoded symbols are interleaved within a block interleaver size of 240 symbols and broadcast every second. The resulting data rate is 250 symbol/second. The user receiver, after the detection of the synchronization pattern and the deinterleaving of the symbols, decodes the page symbols into data bits commonly by using a Viterbi Algorithm (VA) [1]. VA performs an iterative search to realise maximum-likelihood decoding. Implementing a Viterbi Decoder (VD) for mass-market and commercial applications could be demanding. In communication application, a VD may consume more than onethird of power consumption of the whole baseband processing [2]. Thus, designing an optimized VD to reduce the power consumption, especially for mobile and mass market applications, is an important topic. This paper presents the results of a new decoder called State Transparent Convolutional (STC) [4]. The analyses are carried out in simulated scenarios and on-field tests and the computational load of the VD and STC decoder as function of the C/N0 and elevation angle will be investigated. Results show a great benefit in term of complexity reduction when STS is applied in decoding the Galileo Open Service Navigation messages.","PeriodicalId":228093,"journal":{"name":"2016 8th 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":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125808631","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: 3

Performance analysis of hybrid GNSS and lte localization in urban scenarios 城市场景下GNSS和lte混合定位的性能分析

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849332

J. A. del Peral-Rosado, Roger Estatuet I Castillo, Javier Mıguez-Sanchez, M. Navarro-Gallardo†, J. García-Molina, J. López-Salcedo, G. Seco-Granados, F. Zanier, M. Crisci

引用次数: 22

Snapshot localisation of multiple jammers based on receivers of opportunity 基于机会接收器的多干扰机快照定位

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849324

J. García-Molina, M. Crisci

{"title":"Snapshot localisation of multiple jammers based on receivers of opportunity","authors":"J. García-Molina, M. Crisci","doi":"10.1109/NAVITEC.2016.7849324","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849324","url":null,"abstract":"The detection and localisation of multiple GNSS jammers in densely populated areas seems to be already a need due to the availability and proliferation of very cheap and small GNSS jammers (together with the raise of the privacy awareness), and the increasing number of services and applications relying on the GNSS signals for its operation. Densely populated areas do not only introduce the possibility to have several jamming devices in close locations, but also the availability of a relatively large number of users and devices that could be exploited as Receivers of Opportunity (RoO) for detecting and localising jammers located in the same area. In this context, the evolution of the Internet of Things and cloud computing, with devices connected to the Internet and applications running in the cloud, makes possible to think about a cloud-based localisation of jammers exploiting the signal snapshots gathered by those RoOs. This paper presents and discusses the snapshot localisation of multiple jammers based on the estimation of TDOA and FDOA measurements between RoOs, and the clustering process necessary to be performed before the multiple jammers can be localised, process that is proposed to be done in the position domain. The simulation results presented show that the localisation of multiple jammers, even in close locations, is feasible, and accuracies in the order of few meters should be achievable.","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128949396","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: 5

Sampling frequency impact on false lock of high order BOC signals in open-loop processing 开环处理中采样频率对高阶BOC信号误锁的影响

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849327

Adria Gusi, P. Closas, J. García-Molina

引用次数: 1

An approach to discriminate GNSS spoofing from multipath fading 一种GNSS欺骗与多径衰落的鉴别方法

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849322

A. Broumandan, A. Jafarnia-Jahromi, G. Lachapelle, R. Ioannides

{"title":"An approach to discriminate GNSS spoofing from multipath fading","authors":"A. Broumandan, A. Jafarnia-Jahromi, G. Lachapelle, R. Ioannides","doi":"10.1109/NAVITEC.2016.7849322","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849322","url":null,"abstract":"GNSS signals are vulnerable to various types of interference including jamming and spoofing attacks. Spoofing signals are designed to deceive target GNSS receivers without being detected by conventional receiver quality monitoring metrics. This paper focuses on detecting an overlapped spoofing attack where the correlation peaks of the authentic and spoofing signals interact during the attack. Several spoofing detection and signal quality monitoring (SQM) metrics are introduced. This paper proposes a spoofing detection architecture utilizing combination of different metrics to detect spoofing signals and distinguish them from multipath signals. Experimental results show that the pre-despreading spoofing detection metrics such as variance analysis are not sensitive to multipath propagation and can be used in conjunction with post-despreading methods to correctly detect spoofing signals. Several test scenarios based on different spoofing and multipath cases are performed to demonstrate the effectiveness of the proposed architecture to correctly detect spoofing attack ands distinguish them from multipath.","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"443 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126995234","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: 8

A spoofing mitigation technique for dynamic applications 一种用于动态应用程序的欺骗缓解技术

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849353

M. Berardo, Esteban Garbin Manfredini, F. Dovis, L. Presti

{"title":"A spoofing mitigation technique for dynamic applications","authors":"M. Berardo, Esteban Garbin Manfredini, F. Dovis, L. Presti","doi":"10.1109/NAVITEC.2016.7849353","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849353","url":null,"abstract":"Global Navigation Satellite System (GNSS) is becoming pervasive technology, widely used in many fields, like aviation, railway, maritime and road navigation systems. As a consequence an increasing number of applications are being created and it has become necessary to protect the GNSS receiver from malicious attacks, in order to guarantee the reliability of the navigation solution. In this work, a novel algorithm for GNSS spoofing attack detection and mitigation is proposed. This algorithm is a combination of techniques at signal processing level aiming at improving continuity, availability and reliability of the positioning solution. The idea is to detect and raise a warning about the presence of a spoofer while continuing to provide trusted position obtained by using Doppler measurements. A correction process estimates the relative delay between the true signal and the spoofer and unlocks the receiver from the spoofer and re-locks it to the true signal. If the unlocking process is successful, the receiver computes the position using mitigated pseudorange measurements.","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115686171","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: 6

Performance analysis of an absolute phase modulation scheme for GNSS signals GNSS信号绝对相位调制方案的性能分析

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849331

F. Nunes, Jose M. N. Leitao, Fernando M. G. Sousa

引用次数: 4

Pilot-aided GNSS data demodulation performance in realistic channels and urban live tests 导航辅助GNSS数据解调性能在现实信道和城市现场测试

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849359

F. Salgueiro, M. Luise, F. Zanier, P. Crosta

{"title":"Pilot-aided GNSS data demodulation performance in realistic channels and urban live tests","authors":"F. Salgueiro, M. Luise, F. Zanier, P. Crosta","doi":"10.1109/NAVITEC.2016.7849359","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849359","url":null,"abstract":"This paper presents a novel technique to improve data demodulation performance of global navigation satellite system (GNSS) signals with data and pilot signal components (e.g. suitable for Galileo E1B/C open service (OS) signals [1]). This technique is called Pilot-aided data demodulation because it uses the coherence between residual phase errors on the data and the pilot components of the GNSS signal to perform channel estimation. Differently from standard techniques [2], where the carrier phase of the received signal is tracked by means of a phase locked loop (PLL) on the pilot component and such estimation is used to control the data correlators, the pilot aided technique does not necessarily requires a PLL, but it can work as well with a simple and more robust frequency locked loop (FLL) or just with open loop frequency estimation. This is particularly valuable in challenging environments, such as urban scenarios, where the phase lock is hard to be maintained for long periods. The main advantage of this technique is clearly visible in terms of page error rate under fades and multipath. In open sky scenarios and additive white Gaussian noise (AWGN) assumption, it exploits the data plus pilot combination, doubling de-facto the power of the received signal with respect to the single data-less component, but it also introduces additional noise (similar to squaring losses) due to the non-linear operations between data and pilot prompt correlators. The output of such technique can then be used to feed the proper decoder according to the coding scheme adopted in the GNSS navigation message (e.g. Viterbi decoder for E1B).","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128812229","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: 5

Computational performance of a cloud GNSS receiver using multi-thread parallelization 基于多线程并行的云GNSS接收机计算性能研究

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849357

V. Lucas-Sabola, G. Seco-Granados, J. López-Salcedo, J. García-Molina, M. Crisci

{"title":"Computational performance of a cloud GNSS receiver using multi-thread parallelization","authors":"V. Lucas-Sabola, G. Seco-Granados, J. López-Salcedo, J. García-Molina, M. Crisci","doi":"10.1109/NAVITEC.2016.7849357","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849357","url":null,"abstract":"The proliferation of GNSS-based (Global Navigation Satellite Systems) services and applications providing ubiquitous, seamless and secure/reliable positioning is driving the use of high-performance devices. This implies the requirement of a higher computational capability in miniaturized size and low power consumption devices such as smartphones or Smart- City sensors. In this context, a possible alternative is to carry out the computational tasks outside the device, making use of the scalable, secure and nearly unlimited resources of Cloud infrastructure. This work presents the implementation of a Cloud-based GNSS receiver by taking advantage of one of the available Cloud infrastructures, such as Amazon Web Services (AWS). We will provide a review of the most relevant features of AWS for GNSS signal processing, as a case of study for stimulating the use of Cloud infrastructures within the GNSS community, while paving the way for the development of nextgeneration GNSS receivers. Furthermore, parallel computing will be studied to improve the Cloud GNSS receiver performance.","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124373531","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: 3

Gnss signal authenticity verification using carrier phase measurements with multiple receivers Gnss信号真实性验证使用载波相位测量与多个接收机

2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC) Pub Date : 2016-12-01 DOI: 10.1109/NAVITEC.2016.7849323

A. J. Jahromi, A. Broumandan, Geard Lachapelle

{"title":"Gnss signal authenticity verification using carrier phase measurements with multiple receivers","authors":"A. J. Jahromi, A. Broumandan, Geard Lachapelle","doi":"10.1109/NAVITEC.2016.7849323","DOIUrl":"https://doi.org/10.1109/NAVITEC.2016.7849323","url":null,"abstract":"Structural interference signals can severely jeopardize the performance of GNSS receivers which may lead to serious consequences for scores of applications. This type of interference is designed to be very similar to the authentic GNSS signals; therefore, it is very difficult for a conventional receiver to discriminate them from genuine observations. This research focuses on the application of a carrier phase capable dual antenna receiver (or two spatially separated receivers) to allow authenticity verification and reliable measurements classification. Assuming that all counterfeit PRNs originate from the same source, the proposed method identifies fake measurements based on their time invariant carrier phase double differences. The proposed detection procedure is based on a combination of GLRT and graph theory formulated to classify counterfeit and authentic signals and to reduce the authenticity verification time. Simulations and real-data processing results verify that the proposed technique can successfully classify the authentic and counterfeit measurements within a few minutes. The real-world performance of this method has also been verified on carrier phase capable GNSS receivers. The theoretical analyses and processing results show that the performance of this technique improves as the observation interval or receiver antenna spacing increases.","PeriodicalId":228093,"journal":{"name":"2016 8th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123463491","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: 14