Clock Synchronization Algorithm for Pseudolite

Hwang, Seung Jae; Yu, Donghui

doi:10.14257/astl.2013.44.09

Cited by 4 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study shows the simulation results and suggests the algorithm of reduction of possible measurement errors. Hwang and Yu 11,12 proposed an original algorithm for matching clock scales in a pseudolite network and reducing accuracy errors due to the lack of synchronization of individual pseudolites in the network. So et al 13 analyzed and simulated the influence of the troposphere on the accuracy of pseudolite navigation.…”

Section: Reference Analysis and Problem Statementmentioning

confidence: 99%

“…The DOP shows how the mean square error (MSE) of the consumer’s coordinates are greater than the MSE of the pseudorange between the pseudolite and the consumer. Basic models of distance measuring are based on the methods of gradient analysis, 10–12 in which decomposition of the distance function into the Taylor series by discrepancy δ j , ( j = 1 , 2 , 3 , 4 ) can give the following system:…”

Section: Theoretical Approach For the Accuracy Of Dynamic Global Posi...mentioning

confidence: 99%

See 1 more Smart Citation

Model of an alternative navigation system for high-precision weapons

Savchenko

Tolubko

Беркман

et al. 2020

Journal of Defense Modeling & Simulation

View full text Add to dashboard Cite

The article explores the problem of alternative navigation support for high-precision weapons that use guidance based on signals from global navigation systems. It proposes the use of an autonomous navigation system replacing satellite navigation in the case where major Global Positioning System-like systems are unavailable. It suggests the idea and the model of a moving navigation field that can move along the weapon trajectory. The model of accuracy for the pseudolite navigation system uses the least squares method as its basis. The study looks into the accuracy parameters of the moving navigation field. The results of the study show the advantages of a moving field when compared with a stationary navigation field in case of autonomous use. This research also shows the possibility of using an autonomous system for Special Forces, search and rescue operations, and robotic and unmanned aerial, ground, and sea-based vehicles.

show abstract

Section: Reference Analysis and Problem Statementmentioning

confidence: 99%

Section: Theoretical Approach For the Accuracy Of Dynamic Global Posi...mentioning

confidence: 99%

Model of an alternative navigation system for high-precision weapons

Savchenko

Tolubko

Беркман

et al. 2020

Journal of Defense Modeling & Simulation

View full text Add to dashboard Cite

show abstract

“…The simulation was performed and the algorithm of reducing possible measurement errors was proposed. In [10,11] the authors proposed an original algorithm of the coordination of time scales in the network of pseudolites and reducing the errors in accuracy through the lack of synchronization of individual pseudolites in the network. The article [12] analyzed and simulated the impact of troposphere on the accuracy of defining the state vector of the consumer in LRNS.…”

Section: Analysis Of Scientific Literature and The Problem Statementmentioning

confidence: 99%

“…Based on the obtained expressions for geometric factors in general case, the assessment of various variants of setting up LRNS by the accuracy is performed by comparing the values of the variables of an error of determining spatial coordinates based on the ratio ( ) 33 , σ = γ + γ + γ (10) where ij γ are the elements of the matrix q . K…”

Section: G Zu Consists Of Information Links Between the Elements Of mentioning

confidence: 99%

The model of accuracy of a local radio navigation system considering unstable performance of individual elements

Savchenko

Vorobiov

Mykolaichuk

et al. 2016

EEJET

View full text Add to dashboard Cite

ground (GPL) pseudolites, a network of control stations (CS) and a consumer segment (Fig. 1). The GPL network creates a continuous navigation field for consumers above the ground (planes, helicopters and, in fact, air pseudolites). The APL network creates similar field for ground (terrestrial) consumers. As for any navigation system, a topical issue for LRNS is a problem of the accuracy of determining the location of moving objects, and since in addition to the location determining these systems allow defining parameters of speed, then, in general, we can talk about the state vector of the consumer. The given problem acquires even greater relevance for the systems of special purpose (military, emergency services, etc.), which operate under challenging

show abstract

“…10 Whether it is an independent pseudolite system or a system composed of real navigation satellites and pseudolites, the accuracy of time synchronization directly affects the system's performance. 11 At present, the mainstream time synchronization methods include two-way time and frequency transfer 12,13 and GNSS timing receiver for pseudolite timing. 14,15 However, there are few quantitative studies on the time synchronization requirement of pseudolite.…”

Section: Introductionmentioning

confidence: 99%

Time synchronization requirement of global navigation satellite system augmentation system based on pseudolite

Yang

Chen

et al. 2019

Measurement and Control

View full text Add to dashboard Cite

Global navigation satellite systems are widely used across the world because of their continuous/all-weather, global coverage, and high precision positioning. But, three-dimensional positioning accuracy, especially in the vertical direction, remains insufficient because of the geometric distribution of satellites. This is especially true for airborne objects such as unmanned aerial vehicles, civil aviation devices, and missiles. To solve this problem, we adopt a satellite-ground joint positioning system based on a pseudo-satellite (pseudolite). The introduction of ground pseudolites can significantly reduce the vertical dilution of precision and improve positioning accuracy. This method has been proposed in the 1980s. However, we have to ask a question, as long as we add a pseudolite, can the positioning accuracy be improved? The answer is no. Pseudolites can cause time synchronization problems with satellites, and the resulting timing errors of the pseudolite are converted into pseudorange errors, reducing accuracy. Here, we seek to evaluate the impact of the reduced vertical dilution of precision and the increased range errors associated with the introduction of a pseudolite on the ground. We derive a mathematical formula to explain this relationship. We conclude that when the satellite range error and the change in the position dilution of precision associated with a pseudolite are known, we can calculate an approximate limit for the pseudolite timing accuracy to ensure that the use of the pseudolite improves the positioning accuracy. This work should be of great value in guiding engineering practice.

show abstract

Clock Synchronization Algorithm for Pseudolite

Cited by 4 publications

References 0 publications

Model of an alternative navigation system for high-precision weapons

Model of an alternative navigation system for high-precision weapons

The model of accuracy of a local radio navigation system considering unstable performance of individual elements

Time synchronization requirement of global navigation satellite system augmentation system based on pseudolite

Contact Info

Product

Resources

About