An antenna autotracking system for Ka band intersatellite links

Giubilei, R.; Badessi, S.

doi:10.2514/6.1992-2046

Cited by 1 publication

(3 citation statements)

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“…In the following we illustrate the previous theory for SNR computation, making some simplifying assumptions for the IF filter characteristics and check the results via a computer simulation. Moreover, the pointing detector characteristic is derived for realistic beam characteristics 1,7 and the meansquare pointing error is derived for a set of typical system parameters. 1…”

Section: Study Casementioning

confidence: 99%

“…Moreover, the pointing detector characteristic is derived for realistic beam characteristics 1,7 and the meansquare pointing error is derived for a set of typical system parameters. 1…”

Section: Study Casementioning

confidence: 99%

“…The application which motivated this work concerns the pointing of an antenna on-board a geosynchronous (GEO) satellite towards a spacecraft in low earth orbit (LEO), in order to maintain an intersatellite link (ISL) for data relay purposes. 1 A very popular example of such a type of link involves the US space shuttle, which uses the satellites of the tracking and data relay satellite system (TDRSS) to establish a communication link with ground. The analysis described in this paper has been carried out in the frame of the European data relay and technology mission (DRTM) programme of ESA, however, it can be extended to any system with similar characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a satellite antenna tracking loop driven by BPSK modulated signals

Giubilei

1997

Int. J. Satell. Commun.

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The subject of this paper is an antenna tracking system used to maintain an antenna on board a geosynchronous (GEO) satellite, pointed towards a low earth orbit (LEO) satellite. The tracking system uses the BPSK modulated signals transmitted from the LEO satellite. The signal is received by an electronically switched antenna beam. A suitable processing of the received signal level then generates an error voltage which drives a tracking loop. The measurement of the received signal level is implemented by a power detector. Analysis of the antenna tracking algorithm is carried out and the performance is given in terms of linearized mean-square tracking error. The mean-square tracking error is related to the antenna beam parameters, to the closed loop bandwidth and to the statistics of the power measurement process. In particular, it is shown that a key parameter for the tracking loop performance is the signal-to-noise ratio (SNR) at the power detector output, which is inversely proportional to the variance of the pointing error, and a theory has been developed to find an accurate expression for the SNR.

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Section: Study Casementioning

confidence: 99%

“…Moreover, the pointing detector characteristic is derived for realistic beam characteristics 1,7 and the meansquare pointing error is derived for a set of typical system parameters. 1…”

Section: Study Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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