Multipath analysis using code-minus-carrier for dynamic testing of GNSS receivers

Blanco-Delgado, Nuria; Haag, Maarten Uijt de

doi:10.1109/icl-gnss.2011.5955254

Cited by 19 publications

(12 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this method, data for all positions were used, as sufficient data are needed to derive the results. However, by adding to the method the process of removing obviously erroneous data [ 20 ], it is possible to obtain more accurate position estimates.…”

Section: Discussionmentioning

confidence: 99%

High Precision Location Estimation in Mountainous Areas Using GPS

Kunisada¹,

Premachandra²

2022

Sensors

View full text Add to dashboard Cite

Outdoor recreation has become popular in recent years, against the backdrop of the new coronavirus epidemic that started in 2020. Mountaineering, in particular, has become a popular pastime for many people as an easy way to experience nature. However, the number of mountaineering accidents is increasing, owing to the inadequate knowledge and equipment for beginners. In particular, the lack of map-reading skills and experience often leads to the selection of wrong trails. The smartphones used for precise location information obtain correction information from radio waves from a base station, and the accuracy of using only the GPS in mountainous areas without radio waves is questionable. In general, the GPS position correction methods in the literature for such situations include complex processing of the GPS radio waves. Some of these methods have been proposed with complex hardware and are difficult to implement with portable hardware. In this study, we develop and demonstrate a method for obtaining accurate location information using GPS without the error correction of radio waves, even in mountainous areas. The multipath is the reason for most of the GPS errors in the mountains. In the mountains, depending on the locations, the correct GPS location can also be received. In the proposed method, the correct GPS data are used to detect the incorrect GPS locations. We present an experimental method for estimating the interrelationship between the GPS longitude and latitude data. Additionally, we demonstrate the effectiveness of our method by showing that the experimental mountain location data presented in this paper are more accurate than the GPS data alone.

show abstract

Section: Discussionmentioning

confidence: 99%

High Precision Location Estimation in Mountainous Areas Using GPS

Kunisada¹,

Premachandra²

2022

Sensors

View full text Add to dashboard Cite

show abstract

“…[14][15][16] Utilizing dual-frequency observations, code-minus-carrier measurements (CMC) can be obtained to estimate code multipath error and evaluate multipath conditions when carrier-phase and codephase measurements are available. 17,18 To eliminate the multipath effects effectively, the correctness and robustness of distinguishing and classifying the direct, NLOS, multipath signals are essential. The strength of the signal which is defined as the carrier to noise (C=N 0 ) value is a traditional signal identification indicator.…”

Section: Introductionmentioning

confidence: 99%

A bagging tree-based pseudorange correction algorithm for global navigation satellite system positioning in foliage canyons

Qin

Wang

et al. 2021

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

Global navigation satellite system is indispensable to provide positioning, navigation, and timing information for pedestrians and vehicles in location-based services. However, tree canopies, although considered as valuable city infrastructures in urban areas, adversely degrade the accuracy of global navigation satellite system positioning as they attenuate the satellite signals. This article proposes a bagging tree-based global navigation satellite system pseudorange error prediction algorithm, by considering two variables, including carrier to noise C/ N0 and elevation angle θe to improve the global navigation satellite system positioning accuracy in the foliage area. The positioning accuracy improvement is then obtained by applying the predicted pseudorange error corrections. The experimental results shows that as the stationary character of the geostationary orbit satellites, the improvement of the prediction accuracy of the BeiDou navigation satellite system solution (85.42% in light foliage and 83.99% in heavy foliage) is much higher than that of the global positioning system solution (70.77% in light foliage and 73.61% in heavy foliage). The positioning error values in east, north, and up coordinates are improved by the proposed algorithm, especially a significant decrease in up direction. Moreover, the improvement rate of the three-dimensional root mean square error of positioning accuracy in light foliage area test is 86% for BeiDou navigation satellite system/global positioning system combination solutions, while the corresponding improvement rate is 82% for the heavy foliage area test.

show abstract

“…The so-called Code-Minus-Carrier (CMC) has been specially used for ground monitoring in Ground Based Augmentation System (GBAS) [8]. Moreover, this technique has been also used to analyse multipath for slow moving objects as in [9]. However, one main problem associated with CMC as shown in [9], is that it is necessary to remove the contribution of the carrier phase integer ambiguity.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, this technique has been also used to analyse multipath for slow moving objects as in [9]. However, one main problem associated with CMC as shown in [9], is that it is necessary to remove the contribution of the carrier phase integer ambiguity. Since this is normally achieved by removing the average value of CMC over a long satellite observation period, it is a problem for mobile users in urban scenarios with constant loss of tracking as we present later in the paper.…”

Section: Introductionmentioning

confidence: 99%

Detection of GNSS Multipath with Time-Differenced Code-Minus-Carrier for Land-Based Applications

Caamano

Crespillo

Gerbeth

et al. 2020

2020 European Navigation Conference (ENC)

View full text Add to dashboard Cite

Ground transportation systems demand accurate and robust localization functions. Satellite navigation is considered a key element in those systems, but its position determination can be highly corrupted in urban environments because of the presence of reflected signals (i.e. multipath). This paper deals with the detection of multipath in the code measurements of GNSS receivers for mobile users in urban scenarios. First, we discuss the different alternatives and limitations to properly isolate multipath autonomously at the receiver based on Code-Minus-Carrier (CMC) techniques in challenging GNSS applications. We then propose a practical methodology to design a suitable multipath detector based on the time difference of CMC. All the analysis and evaluations are supported with real measurements collected in Railway scenarios.

show abstract

Multipath analysis using code-minus-carrier for dynamic testing of GNSS receivers

Cited by 19 publications

References 3 publications

High Precision Location Estimation in Mountainous Areas Using GPS

High Precision Location Estimation in Mountainous Areas Using GPS

A bagging tree-based pseudorange correction algorithm for global navigation satellite system positioning in foliage canyons

Detection of GNSS Multipath with Time-Differenced Code-Minus-Carrier for Land-Based Applications

Contact Info

Product

Resources

About