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Satellite beam power backoff

A technology of power back-off and power back-off value, applied in the field of satellite communication, can solve the problems of non-coverage and gap of NGSO satellite communication system

Active Publication Date: 2017-12-01
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While disabling an NGSO satellite's beam in this manner may enable the NGSO satellite to meet the EPFD constraints, this may result in unnecessary coverage gaps for the NGSO satellite communication system (e.g., when only a portion of the NGSO satellite's beam interferes with the GSO during satellite transmission)

Method used

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  • Satellite beam power backoff
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  • Satellite beam power backoff

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Embodiment Construction

[0032]Exemplary embodiments described in this application may allow a constellation of NGSO satellites to comply with various EPFD constraints (eg, the ITU's EPFD constraints) without disabling beams transmitted from the NGSO satellites. As described in more detail below, the power level of one or more beams that may be transmitted from the NGSO satellite may be dynamically adjusted according to a beam power backoff schedule. In some aspects, the beam power backoff schedule may specify a beam power backoff value as a function of time and / or satellite position (e.g., latitude on Earth), and may allow a maximum allowable power levels without violating various EPFD limits (eg, ITU's EPFD percentile limits).

[0033] Aspects of the disclosure are described in the following description and associated drawings directed to specific examples. Alternative examples may be devised without departing from the scope of the present disclosure. Additionally, well-known elements will not be ...

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Abstract

A method and apparatus for a non-geosynchronous orbit (NGSO) satellite to comply with equivalent power flux density (EPFD) limits are disclosed. The example implementations may allow a constellation of NGSO satellites to comply with EPFD limits without disabling beams transmitted from the NGSO satellites. The power level of one or more beams to be transmitted from the NGSO satellites may be dynamically adjusted according to a beam power back-off schedule. In some aspects, the beam power back-off schedule may specify beam power back-off values as a function of latitude on Earth, and may allow for maximum allowable power levels for beams transmitted from the NGSO satellites without violating any of the EPFD percentile limits.

Description

Background technique [0001] Various aspects described in this application relate to satellite communications, and more particularly, to compliance with international regulations governing satellite communications. [0002] A conventional satellite-based communication system includes a gateway and one or more satellites for relaying communication signals between the gateway and one or more user terminals. Gateways are earth stations that have antennas for sending signals to and receiving signals from communication satellites. Gateways use satellites to provide communication links for connecting user terminals to other user terminals or users of other communication systems such as the public switched telephone network, the Internet, and various public and / or private networks. Satellites are orbiting receivers and transponders for relaying information. [0003] A satellite can receive signals from and transmit signals to a user terminal provided the user terminal is within the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/204H04W52/24H04W72/04
CPCH04B7/18543H04B7/2041H04W52/243H04W72/046H04W72/0473
Inventor 张丹M·I·居雷尔利S·纳加拉贾D·瓦西洛夫斯基J·T·德特曼G·W·马什Q·吴
Owner QUALCOMM INC
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