首页 > 最新文献

IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium最新文献

英文 中文
Observability of integrated navigation system states under varying dynamic conditions and aiding techniques 变动态条件下组合导航系统状态的可观测性及辅助技术
M. Becker, U. Bestmann, A. Schwithal, P. Hecker
The performance of integrated navigation systems not only depends on the quality of the used inertial measurement unit (IMU) and aiding sensor information, but also on the correct observation of the system's state vector. As a classical example, an integration filter shows a good performance if it manages to estimate the sensor errors properly. As the observability varies with the current system states as well as the quality of the aiding information, a meaningful characterization of the system's performance is difficult to obtain. The aim of this paper is to analyze the impact of the influences named above on the observability of the system model that is part of the navigation filter. For linear and linearized systems, e.g. Kalman Filter and Extended Kalman Filter, different measures of observability can be derived from control theory. This paper will show the necessary basic algorithms and methods to evaluate a system's observability. Based on these insights an evaluation of a standard filter model of an integrated navigation system is performed. Therefore, different dynamic conditions as well as aiding information are taken into account. The main focus of this work lies on the examination of real flight data and correlation between system states and their observability. Based on these investigations this paper presents a detailed view on the assessment and first results towards a better characterization of IMU performance.
组合导航系统的性能不仅取决于所使用的惯性测量单元(IMU)和辅助传感器信息的质量,还取决于系统状态向量的正确观测。作为一个经典的例子,如果一个积分滤波器能够正确地估计传感器误差,它就会显示出良好的性能。由于可观测性随系统当前状态和辅助信息质量的变化而变化,因此很难对系统的性能进行有意义的表征。本文的目的是分析上述影响对导航滤波器中系统模型的可观测性的影响。对于线性和线性化系统,如卡尔曼滤波和扩展卡尔曼滤波,可观测性的不同度量可以从控制理论推导出来。本文将展示评估系统可观测性的必要基本算法和方法。在此基础上,对组合导航系统的标准滤波模型进行了评价。因此,需要考虑不同的动态条件和辅助信息。这项工作的主要重点在于检查真实飞行数据和系统状态及其可观测性之间的相关性。在这些研究的基础上,本文对IMU性能的评估和初步结果进行了详细的阐述。
{"title":"Observability of integrated navigation system states under varying dynamic conditions and aiding techniques","authors":"M. Becker, U. Bestmann, A. Schwithal, P. Hecker","doi":"10.1109/PLANS.2010.5507185","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507185","url":null,"abstract":"The performance of integrated navigation systems not only depends on the quality of the used inertial measurement unit (IMU) and aiding sensor information, but also on the correct observation of the system's state vector. As a classical example, an integration filter shows a good performance if it manages to estimate the sensor errors properly. As the observability varies with the current system states as well as the quality of the aiding information, a meaningful characterization of the system's performance is difficult to obtain. The aim of this paper is to analyze the impact of the influences named above on the observability of the system model that is part of the navigation filter. For linear and linearized systems, e.g. Kalman Filter and Extended Kalman Filter, different measures of observability can be derived from control theory. This paper will show the necessary basic algorithms and methods to evaluate a system's observability. Based on these insights an evaluation of a standard filter model of an integrated navigation system is performed. Therefore, different dynamic conditions as well as aiding information are taken into account. The main focus of this work lies on the examination of real flight data and correlation between system states and their observability. Based on these investigations this paper presents a detailed view on the assessment and first results towards a better characterization of IMU performance.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86386028","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
Linear composite code acquisition method for GNSS GNSS线性复合码获取方法
Yao-Cheng Lin, Shau-Shiun Jan
An acquisition method is proposed which increases the capacity of channels and reduces the processing time to acquire multiple GNSS satellites simultaneously. A linear composite method is designed to synthesize a local replica which combines GPS L1 C/A code and Galileo BOC(1,1) code. The simulation results validate the proposed method and the experimental results are found to be consistent with the simulation results.
提出了一种增加信道容量和减少处理时间的同时获取多颗GNSS卫星的方法。设计了一种结合GPS L1 C/A码和Galileo BOC(1,1)码合成局部副本的线性复合方法。仿真结果验证了该方法的有效性,实验结果与仿真结果吻合较好。
{"title":"Linear composite code acquisition method for GNSS","authors":"Yao-Cheng Lin, Shau-Shiun Jan","doi":"10.1109/PLANS.2010.5507210","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507210","url":null,"abstract":"An acquisition method is proposed which increases the capacity of channels and reduces the processing time to acquire multiple GNSS satellites simultaneously. A linear composite method is designed to synthesize a local replica which combines GPS L1 C/A code and Galileo BOC(1,1) code. The simulation results validate the proposed method and the experimental results are found to be consistent with the simulation results.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87590611","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
The precise INS/GPS geolocation of a vehicle-towed UXO detection system 车辆牵引的未爆弹药探测系统的精确INS/GPS地理定位
Jong Ki Lee, Dana J. Cacamise, C. Jekeli
It is widely known fact that the precise position and orientation is necessary for the UXO detection and discrimination. The primary geolocation system is a dual-frequency GPS receiver integrated with a three dimensional inertial measurement unit (IMU). This study focused on the optimal data processing techniques (wavelet de-noising, nonlinear based filtering, post-processing smoothing) which have been developed and proposed for the high precise geolocation of IMU/GPS system. We mounted two IMUs (HG1700 and HG1900) and one GPS receiver on NRL's vehicle-towed system which already has three Trimble GPS and one IMU (Crossbow 400C). The positions from HG1700 and HG1900 are estimated between control points separated in time by 2 and 4 seconds and compared to 1 Hz GPS control.
众所周知,精确的位置和方位是探测和辨别未爆弹药的必要条件。主定位系统是一个双频GPS接收机,集成了一个三维惯性测量单元(IMU)。针对IMU/GPS系统的高精度地理定位问题,研究了现有的数据处理方法(小波去噪、非线性滤波、后处理平滑)。我们在NRL的车辆牵引系统上安装了两个IMU (HG1700和HG1900)和一个GPS接收器,该系统已经有三个Trimble GPS和一个IMU (Crossbow 400C)。HG1700和HG1900的位置在时间间隔为2秒和4秒的控制点之间估计,并与1 Hz GPS控制进行比较。
{"title":"The precise INS/GPS geolocation of a vehicle-towed UXO detection system","authors":"Jong Ki Lee, Dana J. Cacamise, C. Jekeli","doi":"10.1109/PLANS.2010.5507277","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507277","url":null,"abstract":"It is widely known fact that the precise position and orientation is necessary for the UXO detection and discrimination. The primary geolocation system is a dual-frequency GPS receiver integrated with a three dimensional inertial measurement unit (IMU). This study focused on the optimal data processing techniques (wavelet de-noising, nonlinear based filtering, post-processing smoothing) which have been developed and proposed for the high precise geolocation of IMU/GPS system. We mounted two IMUs (HG1700 and HG1900) and one GPS receiver on NRL's vehicle-towed system which already has three Trimble GPS and one IMU (Crossbow 400C). The positions from HG1700 and HG1900 are estimated between control points separated in time by 2 and 4 seconds and compared to 1 Hz GPS control.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80387733","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
Mosaic aided navigation: Tools, methods and results 马赛克辅助导航:工具、方法和结果
V. Indelman, P. Gurfil, E. Rivlin, H. Rotstein
The on-line construction of an image mosaic or panorama can be exploited to aid the navigation system of an airborne platform. The purpose of the paper is threefold. First, the paper presents some of the tools required for computing a mosaic and using the information collected as a side product within a navigation filter. These tools include a special variation of the Kalman filter and a new formulation of the tri-focal tensor from multi-frame vision. Second, the paper summarizes a general method for fusing the motion information obtained during the mosaicking process and also shows how “loop-closure” can be used to preserve navigation errors at their initial levels. Third, the paper discusses a number of illustrative examples to show how mosaic aiding can indeed result in a substantial improvement of the navigation solution.
图像拼接或全景图像的在线构建可以用来辅助机载平台的导航系统。这篇论文的目的有三个。首先,本文介绍了计算马赛克所需的一些工具,并将收集到的信息用作导航滤波器中的副产物。这些工具包括卡尔曼滤波器的特殊变体和多帧视觉的三焦张量的新公式。其次,本文总结了一种融合拼接过程中获得的运动信息的一般方法,并展示了如何使用“闭环”将导航误差保持在初始水平。第三,本文讨论了一些说明性的例子,以显示马赛克辅助如何确实可以导致导航解决方案的实质性改进。
{"title":"Mosaic aided navigation: Tools, methods and results","authors":"V. Indelman, P. Gurfil, E. Rivlin, H. Rotstein","doi":"10.1109/PLANS.2010.5507282","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507282","url":null,"abstract":"The on-line construction of an image mosaic or panorama can be exploited to aid the navigation system of an airborne platform. The purpose of the paper is threefold. First, the paper presents some of the tools required for computing a mosaic and using the information collected as a side product within a navigation filter. These tools include a special variation of the Kalman filter and a new formulation of the tri-focal tensor from multi-frame vision. Second, the paper summarizes a general method for fusing the motion information obtained during the mosaicking process and also shows how “loop-closure” can be used to preserve navigation errors at their initial levels. Third, the paper discusses a number of illustrative examples to show how mosaic aiding can indeed result in a substantial improvement of the navigation solution.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80449491","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
Pedestrian dead reckoning system with phone location awareness algorithm 行人航位推算系统与手机位置感知算法
S. Shin, M. Lee, Chan Gook Park, H. Hong
In this paper we present a PDR (Pedestrian Dead Reckoning) system with a phone location awareness algorithm. PDR is a device which provides position information of the pedestrian. In general, the step length is estimated using a linear combination of the walking frequency and the acceleration variance for the mobile phone. It means that the step length estimation accuracy is affected by coefficients of the walking frequency and the acceleration variance which are called step length estimation parameters. Developed PDR is assumed that it is embedded in the mobile phone. Thus, parameters can be different from each phone location such as hand with swing motion, hand without any motion and pants pocket. It means that different parameters can degrade the accuracy of the step length estimation. Step length estimation result can be improved when appropriate parameters which are determined by phone location awareness algorithm are used. In this paper, the phone location awareness algorithm for PDR is proposed.
本文提出了一种基于手机位置感知算法的行人航位推算系统(PDR)。PDR是一种提供行人位置信息的设备。一般来说,步长是使用行走频率和手机加速度方差的线性组合来估计的。这意味着步长估计的精度受到步长估计参数——行走频率系数和加速度方差系数的影响。发达的PDR是假定它嵌入在手机上的。因此,参数可以根据每个手机位置而不同,例如有摆动运动的手,没有任何运动的手和裤子口袋。这意味着不同的参数会降低步长估计的精度。利用手机位置感知算法确定的适当参数,可以改善步长估计结果。提出了一种基于PDR的手机位置感知算法。
{"title":"Pedestrian dead reckoning system with phone location awareness algorithm","authors":"S. Shin, M. Lee, Chan Gook Park, H. Hong","doi":"10.1109/PLANS.2010.5507241","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507241","url":null,"abstract":"In this paper we present a PDR (Pedestrian Dead Reckoning) system with a phone location awareness algorithm. PDR is a device which provides position information of the pedestrian. In general, the step length is estimated using a linear combination of the walking frequency and the acceleration variance for the mobile phone. It means that the step length estimation accuracy is affected by coefficients of the walking frequency and the acceleration variance which are called step length estimation parameters. Developed PDR is assumed that it is embedded in the mobile phone. Thus, parameters can be different from each phone location such as hand with swing motion, hand without any motion and pants pocket. It means that different parameters can degrade the accuracy of the step length estimation. Step length estimation result can be improved when appropriate parameters which are determined by phone location awareness algorithm are used. In this paper, the phone location awareness algorithm for PDR is proposed.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81683555","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: 52
SAR500 - A high-precision high-stability butterfly gyroscope with north seeking capability SAR500 -高精度、高稳定性、具有寻北能力的蝶形陀螺仪
D. Lăpădatu, Bjorn Blixhavn, R. Holm, T. Kvisterøy
This paper describes a novel high-precision, low-noise, high-stability, calibrated and compensated digital oscillatory gyroscope with SPI interface, housed in custom-made ceramic packages. The device is factory-calibrated and compensated for temperature effects to provide high-accuracy digital output over a broad temperature range. Optimized tuning of the excitation and detection frequencies, as well as optimized mechanical and electrical balancing result in low sensitivity to shock and vibrations. By utilizing a unique sealed cavity technology, the vibrating elements of the gyroscope are contained within the low-pressure hermetic environment needed for high Q factors. Further on, improved stability of the device is achieved by full design symmetry, high thermal efficiency and choice of crystalline materials in the entire structure.
本文介绍了一种新型的高精度、低噪声、高稳定、经过校准和补偿的带有SPI接口的数字振荡陀螺仪,该陀螺仪安装在定制的陶瓷封装中。该器件经过工厂校准和温度效应补偿,可在宽温度范围内提供高精度数字输出。优化的激励和检测频率调谐,以及优化的机械和电气平衡导致对冲击和振动的低灵敏度。通过采用独特的密封腔技术,陀螺仪的振动元件被包含在高Q因子所需的低压密封环境中。此外,通过在整个结构中充分对称的设计、高热效率和晶体材料的选择,提高了器件的稳定性。
{"title":"SAR500 - A high-precision high-stability butterfly gyroscope with north seeking capability","authors":"D. Lăpădatu, Bjorn Blixhavn, R. Holm, T. Kvisterøy","doi":"10.1109/PLANS.2010.5507139","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507139","url":null,"abstract":"This paper describes a novel high-precision, low-noise, high-stability, calibrated and compensated digital oscillatory gyroscope with SPI interface, housed in custom-made ceramic packages. The device is factory-calibrated and compensated for temperature effects to provide high-accuracy digital output over a broad temperature range. Optimized tuning of the excitation and detection frequencies, as well as optimized mechanical and electrical balancing result in low sensitivity to shock and vibrations. By utilizing a unique sealed cavity technology, the vibrating elements of the gyroscope are contained within the low-pressure hermetic environment needed for high Q factors. Further on, improved stability of the device is achieved by full design symmetry, high thermal efficiency and choice of crystalline materials in the entire structure.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89489526","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
Continuous indoor navigation with RFID and INS 连续室内导航与RFID和INS
G. Retscher, Q. Fu
Some navigation applications, such as the navigation of blind users, require that a continuous positioning is performed in combined outdoor urban and indoor environments with a certain positioning accuracy. For outdoor urban environments usually GNSS and dead reckoning are employed and has proven to be satisfactory. In indoor environments, however, absolute position determination with an accuracy in the range of 1 to 2 meters is still very challenging. For indoor location determination, a number of different positioning methods have been developed. In our approach, Radio Frequency Identification (RFID) has been selected and investigated. Using RFID most commonly cell-based positioning is performed. Apart from that we have also investigated trilateration and location fingerprinting based on signal strength measurements (i.e., RSSI short for Received Signal Strength Indication) from the RFID tags in the surrounding environment. The disadvantage of these two positioning methods, however, is the required calibration in the off-line or training phase to deduce ranges to the tags from the RSSI measurements in the case of trilateration or the establishment of the RSSI database at known locations throughout the building in the case of location fingerprinting. Therefore we have developed a new location method based on cell-based positioning which makes use of the measured RSSI in the on-line or positioning phase, i.e., the so-called time-based Cell-of-Origin (CoO). Two modifications have been implemented in comparison to common CoO and will be discussed in the paper. The new approach was then be tested in an indoor environment in an office building of the Vienna University of Technology. It could be seen that for a combined positioning of RFID time-based CoO and a low-cost MEMS-based INS positioning accuracies on the 1 to 2 meter level can be achieved. The different experiments performed in the test bed are described and discussed in this contribution.
一些导航应用,如盲人用户的导航,需要在城市室外和室内环境相结合的情况下进行连续定位,并具有一定的定位精度。对于室外城市环境,通常采用GNSS和航位推算,并且已被证明是令人满意的。然而,在室内环境中,在1到2米的范围内确定绝对位置仍然是非常具有挑战性的。为了确定室内位置,已经开发了许多不同的定位方法。在我们的方法中,选择并研究了射频识别(RFID)。使用RFID最常见的是基于小区的定位。除此之外,我们还研究了基于周围环境中RFID标签的信号强度测量(即RSSI,即接收信号强度指示的缩写)的三边测量和位置指纹识别。然而,这两种定位方法的缺点是,在三边测量的情况下,需要在离线或训练阶段进行校准,以从RSSI测量值推断出标签的范围,或者在位置指纹的情况下,需要在整个建筑物的已知位置建立RSSI数据库。因此,我们开发了一种新的基于cell-based positioning的定位方法,该方法利用在线或定位阶段测量的RSSI,即所谓的基于时间的Cell-of-Origin (CoO)。与普通CoO相比,本文进行了两项修改,并将在本文中进行讨论。这种新方法随后在维也纳科技大学的一栋办公楼的室内环境中进行了测试。可以看出,将基于RFID时间的CoO与基于低成本mems的INS结合定位,可以实现1 ~ 2米级别的定位精度。在这个贡献中描述和讨论了在试验台进行的不同实验。
{"title":"Continuous indoor navigation with RFID and INS","authors":"G. Retscher, Q. Fu","doi":"10.1109/PLANS.2010.5507242","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507242","url":null,"abstract":"Some navigation applications, such as the navigation of blind users, require that a continuous positioning is performed in combined outdoor urban and indoor environments with a certain positioning accuracy. For outdoor urban environments usually GNSS and dead reckoning are employed and has proven to be satisfactory. In indoor environments, however, absolute position determination with an accuracy in the range of 1 to 2 meters is still very challenging. For indoor location determination, a number of different positioning methods have been developed. In our approach, Radio Frequency Identification (RFID) has been selected and investigated. Using RFID most commonly cell-based positioning is performed. Apart from that we have also investigated trilateration and location fingerprinting based on signal strength measurements (i.e., RSSI short for Received Signal Strength Indication) from the RFID tags in the surrounding environment. The disadvantage of these two positioning methods, however, is the required calibration in the off-line or training phase to deduce ranges to the tags from the RSSI measurements in the case of trilateration or the establishment of the RSSI database at known locations throughout the building in the case of location fingerprinting. Therefore we have developed a new location method based on cell-based positioning which makes use of the measured RSSI in the on-line or positioning phase, i.e., the so-called time-based Cell-of-Origin (CoO). Two modifications have been implemented in comparison to common CoO and will be discussed in the paper. The new approach was then be tested in an indoor environment in an office building of the Vienna University of Technology. It could be seen that for a combined positioning of RFID time-based CoO and a low-cost MEMS-based INS positioning accuracies on the 1 to 2 meter level can be achieved. The different experiments performed in the test bed are described and discussed in this contribution.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89751698","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: 27
Impact of satellite coverage in single-frequency precise heading determination 卫星覆盖对单频精确航向确定的影响
João Reis, J. Sanguino, A. Rodrigues
When using the signal from the Global Positioning System for precise estimation of the heading of a vehicle, the main challenge is finding the integer ambiguities that the carrier phase measurements contain. Using the known distance between the antennas, this process may return improved results, which can be even further enhanced if careful selection of observable data, the measurement from each satellite, is applied. This paper presents a study of the overall influence of the number of used observables in the precision and stability of the heading estimation solution. The presented conclusions provide clear guidance on how to elect which observables are the most beneficial to the solution.
当使用来自全球定位系统的信号来精确估计车辆的航向时,主要的挑战是找到载波相位测量包含的整数模糊性。利用天线之间的已知距离,这一过程可能会得到改进的结果,如果仔细选择可观测数据,即每颗卫星的测量结果,甚至可以进一步增强。本文研究了观测数对航向估计解的精度和稳定性的总体影响。所提出的结论为如何选择哪些观测值对解决方案最有利提供了明确的指导。
{"title":"Impact of satellite coverage in single-frequency precise heading determination","authors":"João Reis, J. Sanguino, A. Rodrigues","doi":"10.1109/PLANS.2010.5507316","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507316","url":null,"abstract":"When using the signal from the Global Positioning System for precise estimation of the heading of a vehicle, the main challenge is finding the integer ambiguities that the carrier phase measurements contain. Using the known distance between the antennas, this process may return improved results, which can be even further enhanced if careful selection of observable data, the measurement from each satellite, is applied. This paper presents a study of the overall influence of the number of used observables in the precision and stability of the heading estimation solution. The presented conclusions provide clear guidance on how to elect which observables are the most beneficial to the solution.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74706130","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: 10
First responder location and tracking using Synthetic Aperture Navigation 使用合成孔径导航定位和跟踪第一响应者
L. Haas, M. Harlacher
The Synthetic Aperture Navigation (SAN) signal processing algorithm identifies the desired line of sight (LOS) signal component by exploiting user motion. As implied by the name, it forms a synthetic aperture along the user trajectory by taking multiple snapshots of signal correlation with the replica waveform over some period of time as the user moves. The synthetic aperture serves as an array, which enables beamforming with a single-element antenna. Fundamentally, this method discriminates between different signal components (e.g., line of sight and multipath) by their directions of arrival. SAN places the antenna array gain on the desired signal component and places nulls on all other components. This operation is applied to data from all correlators in the receiver, thus effectively providing the receiver discriminator with nearly multipath-free measurements. SAN is even able to produce a quality line of sight (LOS) measurement when the LOS component is much weaker than multipath.
合成孔径导航(SAN)信号处理算法通过利用用户运动来识别期望的视线信号分量。顾名思义,它通过在用户移动的一段时间内对与复制波形相关的信号进行多次快照,沿着用户轨迹形成一个合成孔径。合成孔径作为阵列,使波束形成与单元件天线。从根本上说,这种方法根据不同的信号分量(例如,视线和多路径)的到达方向来区分它们。SAN将天线阵列增益放在所需的信号分量上,并在所有其他分量上放置null。该操作适用于来自接收机中所有相关器的数据,从而有效地为接收机鉴别器提供几乎无多径的测量。SAN甚至能够在视线(LOS)组件比多路径弱得多的情况下产生高质量的视线(LOS)测量。
{"title":"First responder location and tracking using Synthetic Aperture Navigation","authors":"L. Haas, M. Harlacher","doi":"10.1109/PLANS.2010.5507250","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507250","url":null,"abstract":"The Synthetic Aperture Navigation (SAN) signal processing algorithm identifies the desired line of sight (LOS) signal component by exploiting user motion. As implied by the name, it forms a synthetic aperture along the user trajectory by taking multiple snapshots of signal correlation with the replica waveform over some period of time as the user moves. The synthetic aperture serves as an array, which enables beamforming with a single-element antenna. Fundamentally, this method discriminates between different signal components (e.g., line of sight and multipath) by their directions of arrival. SAN places the antenna array gain on the desired signal component and places nulls on all other components. This operation is applied to data from all correlators in the receiver, thus effectively providing the receiver discriminator with nearly multipath-free measurements. SAN is even able to produce a quality line of sight (LOS) measurement when the LOS component is much weaker than multipath.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80711339","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: 9
Channels combining techniques for a novel two steps acquisition of new composite GNSS signals in presence of bit sign transitions 信道组合技术用于在位符号转换的情况下两步获取新的合成GNSS信号
K. Sun, L. Presti
In this paper, the problem of acquiring new composite Global Navigation Satellite System (GNSS) signals of the next generation systems (such as Galileo and GPS modernization) is addressed and analyzed, focusing the majority of the attention to the problem of managing the higher sign reversal transition rate due to the navigation message in the data channel and to the secondary code in the pilot channel. It must be considered that in case of the Galileo E1 Open Service (OS) signals, in each period of the primary spreading sequence the presence of a potential sign reversal can reduce the correlation gain. Moreover, the sign transition present on the block of samples being processed produces a Cross Ambiguity Function (CAF) peak splitting along the Doppler axis of the search space matrix constructed during the acquisition stage and it may lead to a wrong Doppler estimate. Here, a new two steps acquisition method has been proposed in order to cope with the CAF peak impairments. Due to the availability of data and pilot components separately broadcast in the new composite GNSS signals, in order to overcome the power loss problem and also to mitigate the CAF peak splitting impairments, novel non-coherent and differentially coherent channels combining techniques based on two steps acquisition scheme have been proposed for jointly combining data and pilot components to recover all the transmitted power from both channels. The proposed two steps channels combining acquisition techniques have been deeply characterized from a statistical point of view. Monte Carlo simulation campaigns have been performed on the simulated Galileo E1 OS signals to evaluate the performances of the proposed acquisition techniques in order to support the theoretical analysis.
本文对下一代系统(如伽利略和GPS现代化)的新合成全球导航卫星系统(GNSS)信号的获取问题进行了讨论和分析,重点关注由于数据信道中的导航电文和导频信道中的辅助码而导致的较高的符号反转转换率的管理问题。必须考虑到,在伽利略E1开放服务(OS)信号的情况下,在主扩频序列的每个周期中,潜在的符号反转的存在会降低相关增益。此外,在被处理的样本块上存在的符号转移会沿着采集阶段构建的搜索空间矩阵的多普勒轴产生交叉模糊函数(CAF)峰分裂,这可能导致错误的多普勒估计。本文提出了一种新的两步获取方法来处理CAF峰值损伤。考虑到新合成GNSS信号中数据和导频分量分别广播的可行性,为了克服功率损耗问题和减轻CAF分峰损伤,提出了一种基于两步采集方案的非相干和差分相干信道合并技术,将数据和导频分量联合起来,恢复两个信道的全部发射功率。从统计的角度对所提出的两步信道组合采集技术进行了深入的分析。为了支持理论分析,对模拟的伽利略E1 OS信号进行了蒙特卡罗仿真活动,以评估所提出的采集技术的性能。
{"title":"Channels combining techniques for a novel two steps acquisition of new composite GNSS signals in presence of bit sign transitions","authors":"K. Sun, L. Presti","doi":"10.1109/PLANS.2010.5507213","DOIUrl":"https://doi.org/10.1109/PLANS.2010.5507213","url":null,"abstract":"In this paper, the problem of acquiring new composite Global Navigation Satellite System (GNSS) signals of the next generation systems (such as Galileo and GPS modernization) is addressed and analyzed, focusing the majority of the attention to the problem of managing the higher sign reversal transition rate due to the navigation message in the data channel and to the secondary code in the pilot channel. It must be considered that in case of the Galileo E1 Open Service (OS) signals, in each period of the primary spreading sequence the presence of a potential sign reversal can reduce the correlation gain. Moreover, the sign transition present on the block of samples being processed produces a Cross Ambiguity Function (CAF) peak splitting along the Doppler axis of the search space matrix constructed during the acquisition stage and it may lead to a wrong Doppler estimate. Here, a new two steps acquisition method has been proposed in order to cope with the CAF peak impairments. Due to the availability of data and pilot components separately broadcast in the new composite GNSS signals, in order to overcome the power loss problem and also to mitigate the CAF peak splitting impairments, novel non-coherent and differentially coherent channels combining techniques based on two steps acquisition scheme have been proposed for jointly combining data and pilot components to recover all the transmitted power from both channels. The proposed two steps channels combining acquisition techniques have been deeply characterized from a statistical point of view. Monte Carlo simulation campaigns have been performed on the simulated Galileo E1 OS signals to evaluate the performances of the proposed acquisition techniques in order to support the theoretical analysis.","PeriodicalId":94036,"journal":{"name":"IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80972600","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: 9
期刊
IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1