Тип публикации: статья из журнала
Год издания: 2016
Ключевые слова: Antenna array, Doppler shift of the carrier frequency, Information systems, Phase measurements, Positioning, Satellite communications, Virtual antenna array
Аннотация: One of the important elements of the modern infocommunication infrastructure is satellite communications, the main advantage of which is the provision of information and communication services on a very large area. This circumstance led to the unpunished pirate capture of the onboard transponder resources and is a problem of the international community since a pirate can be located in the territory of any state within the coverage area of space communications. The coordinates of a space vehicle, on the board of which a transponder is installed, and its characteristics are well known, what simplifies the task of capturing a frequency resource. The pirate activity leads to a violation of the legitimate user rights, who pays for the leased frequency band, but cannot use it due to the pirate capture, and of the rights of an onboard transponder owner, to whom the pirate does not pay for the utilized resource. This requires the development of methods, software, and hardware to ensure an adequate protection of the information interests of the legitimate users of the satellite communications by positioning an unknown ground station (UGS). The article describes the methods and characteristics of the UGS positioning based on the measurements of Doppler shift and/or phase delay of signals proportional to the time of the radio signal propagation. It is shown that the proposed methods allow for the accuracy of the UGS positioning to a tenth of a degree. © Research India Publications.
Журнал: International Journal of Applied Engineering Research
Выпуск журнала: Vol. 11, Is. 3
Номера страниц: 1739-1745
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