Pseudolite systems for close-range navigation: the problem of synchronization<sup>*</sup>

Карцан, И Н; Goncharov, A E; Дмитриев, Д. Е.; Ratuschnyak, V. N.; Ковалев, И В

doi:10.1088/1757-899x/255/1/012011

Cited by 6 publications

(3 citation statements)

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“…При создании беззапросных измерительных станций наземного базирования (БИС-Н) и формировании облика комплекса технических средств (КТС), обеспечивающих их надежное функционирование [1][2][3][4][5], важное значение имеет обоснованный выбор общей схемы источника бесперебойного питания (ИБЭП) в составе КТС БИС-Н. Отметим, что проблемы надежностного проектирования КТС на сегодняшний момент недостаточно полно освещены в научной литературе [6][7][8][9].…”

Section: Introductionunclassified

On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

Kovalev

2023

V International Scientific Conference «mip-v-2023: Modernization, Innovations, Progress»

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In the article, based on the concept of increasing the reliability of the formed image of the complex of technical means for ensuring the operation of an unsolicited measuring station of the network of stations of the ground control complex, a solution is proposed for choosing the general scheme of an uninterruptible power supply as part of a complex of technical means of unsolicited measuring systems. The uninterrupted power supply system is designed to automatically provide a set of technical means for ensuring the operation of a non-demand measuring station with a guaranteed and uninterrupted power supply in accordance with the indicators of reliability, autonomy and quality of electricity specified in the terms of reference. A procedure for selecting the constituent elements of an uninterruptible power supply is proposed, the main stages and composition of the protection means for the power supply network are considered. A block diagram of protection over the power supply network is presented. It is noted that structurally, the uninterruptible power supply should be able to be placed both in a stationary room and in a block container.

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Section: Introductionunclassified

On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

Kovalev

2023

V International Scientific Conference «mip-v-2023: Modernization, Innovations, Progress»

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“…The most important problem in pseudolite technology is time synchronization. 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.…”

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

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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.

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“…The principle is similar with GNSS. However, the time synchronization unit is a complex structure, which increases the cost and complexity of the pseudolites [7].…”

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confidence: 99%

Combination of Asynchronous Array Pseudolites and GNSS for Outdoor Localization

et al. 2019

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Global navigation satellite systems (GNSS) are usually unable to provide location-based service (LBS) in urban canyons, thus the pseudolite positioning system has become an important way to enhance the availability and the accuracy of GNSS in such environments. However, the challenge of the traditional pseudolite positioning system is time synchronization, which requires complex hardware and visibility between pseudolites and reference receiver. Thus, the positioning in the urban environment becomes very difficult and complex. To solve this problem, a new asynchronous array pseudolites system is proposed in this paper. Multi-channel transmitters in array pseudolites system have an identical clock source and are based on an identical 1 pulse per second (1PPS) as well. The clock deviation of pseudolites' pseudorange can be eliminated by making the difference between array channels. The minimum positioning system consisting of one array pseudolite and three navigation satellites is used for positioning experiment in this paper. The results of the simulation verify the effectiveness of the minimum positioning system based on combined positioning. Compared with four navigation satellites, the horizontal positioning accuracy is improved slightly by exploiting the minimum positioning system. INDEX TERMS Array pseudolites, satellite navigation, asynchronous, combined positioning. I. INTRODUCTION

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Pseudolite systems for close-range navigation: the problem of synchronization^*

Cited by 6 publications

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On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

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

Combination of Asynchronous Array Pseudolites and GNSS for Outdoor Localization

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Pseudolite systems for close-range navigation: the problem of synchronization*

Cited by 6 publications

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On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

On the issue of choosing the general scheme of an uninterruptible power supply when designing a complex of technical means of non-request measuring systems

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

Combination of Asynchronous Array Pseudolites and GNSS for Outdoor Localization

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Product

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Pseudolite systems for close-range navigation: the problem of synchronization^*