Zhurnal Radioelektroniki - Journal of Radio Electronics. ISSN 1689-1719. 2020. No. 2
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DOI  10.30898/1684-1719.2020.2.4

UDC 621.396.67.012.12: 621.396.4

 

Electronic stabilization of the beams of a satellite communications system using a sparse network of ground beacons

 

 P. V. Romanov 1, Yu. I. Choni 1, A G. Romanov 2

1 Kazan National Research Technical University named after A. N. Tupolev - KAI, 10, K.Marx St., Kazan, Tatarstan 420111, Russia

2 JSC "Academician M.F. Reshetnev Information Satellite Systems", 52, Lenin Street, Zheleznogorsk, Krasnoyarsk region, 662972, Russia

The paper is received on February 6, 2020

Abstract. Today, multi-beam reflector antennas are widely used to meet the strict requirements on the power budget for satellite telecommunications systems. They form hundreds of needle-like beams that cover the required area. Even relatively small distortions in the shape of the antenna reflector, for example, due to uneven thermal heating, lead to unacceptable disturbance in the orientation of the beams. To maintain the stability of the reflector surface, complex mechanical systems are used.

If not alternative, then an additional system of beams stabilization can focus them on ground beacons located in the centers of the corresponding zones. This realizes adaptive adjustment of the cluster weighting coefficients (CWC) based on beacon signals received. A CWC correction algorithm is proposed to maintain the required beam orientation under conditions when the beacon can be offset from the desired direction up to the periphery of the corresponding zone. The effectiveness of this method of stabilization of the beams is demonstrated. The possibility of reducing the number of ground beacons is discussed, the implementation of which requires the approximation of the CWC from the signals of the surrounding clusters. The results of simulation of the multi-beam reflector antenna of typical geometry show that the restoration of the CWC of intermediate clusters is achieved with an accuracy at which the beam orientation is maintained within 7% of its width.

Key words: satellite multi-beam antenna, reflector surface distortions, compensation, cluster, weighting coefficients, a ground beacon.

References

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For citation:

Romanov P.V., Choni Yu.I., Romanov A.G. Electronic stabilization of the beams of a satellite communications system using a sparse network of ground beacons. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 2. Available at http://jre.cplire.ru/jre/feb20/4/text.pdf
DOI  10.30898/1684-1719.2020.2.4