Powered by OpenAIRE graph
Found an issue? Give us feedback
addClaim

This Research product is the result of merged Research products in OpenAIRE.

You have already added 0 works in your ORCID record related to the merged Research product.

Компенсация эффекта Доплера в задаче спутниковой геолокации

выпускная квалификационная работа бакалавра

Компенсация эффекта Доплера в задаче спутниковой геолокации

Abstract

Объект исследования – сигналы в задаче спутниковой геолокации. Цель работы – повышение вероятности обнаружения сигнала в задаче спутниковой геолокации путём применения алгоритма оценки коэффициента Доплера в условиях его изменения. Тема выпускной квалификационной работы: компенсация эффекта Доплера в задаче спутниковой геолокации. Работа посвящена алгоритму оценки и компенсации влияния эффекта Доплера в условии сложного движения источника излучения по поверхности Земли. Сутью разработанного алгоритма является разбиение обрабатываемых сигналов на короткие временные интервалы, в результате чего задача по оценке сложной зависимости доплеровского сдвига частоты сводится к нескольким простым задачам оценки линейной зависимости частотного смещения с последующей компоновкой результатов. Для оценки работоспособности алгоритма была разработана модель, позволяющая для заданных спутников и траектории движения источника излучения рассчитать зависимость доплеровского смещения частоты. Для нескольких таких зависимостей было проведено сравнение результатов разработанного алгоритма с результатами более простых способов борьбы с эффектом Доплера. В результате было выявлено, что использование разработанного алгоритма способствует повышению вероятности обнаружения сигнала на фоне шума. Использовались открытые образовательные ресурсы и программы поиска и анализа информации. Применено программное обеспечение MATLAB.

The object of the study is signals in the problem of satellite geolocation. The aim of the work is to increase the probability of detecting a signal in a satellite geolocation problem by applying an algorithm for estimating the Doppler coefficient under conditions of its change. The topic of the final qualifying work: compensation of the Doppler effect in the problem of satellite geolocation. The work is devoted to an algorithm for estimating and compensating the effect of the Doppler effect in the condition of complex motion of a radiation source on the Earths surface. The essence of the developed algorithm is the splitting of the processed signals into short time intervals, as a result of which the task of estimating the complex dependence of the Doppler frequency shift is reduced to several simple tasks of estimating the linear dependence of the frequency shift with subsequent arrangement of the results. To assess the efficiency of the algorithm, a model was developed that allows calculating the dependence of the Doppler frequency shift for given satellites and the trajectory of the radiation source. For several such dependencies, the results of the developed algorithm were compared with the results of simpler ways to combat the Doppler effect. As a result, it was revealed that the use of the developed algorithm contributes to an increase in the probability of detecting a signal against a background of noise. Open educational resources and information search and analysis programs were used. MATLAB software has been applied.

Keywords

корреляционная обработка, иммитационное моделирование, АБГШ, AWGN, satellite geolocation, simulation modeling, correlation processing, Doppler effect, эффект Доплера, спутниковая геолокация

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Beta
sdg_colorsSDGs:
Related to Research communities
Upload OA version
Are you the author of this publication? Upload your Open Access version to Zenodo!
It’s fast and easy, just two clicks!