Uplink self-adaptive closed loop power control method for satellite communication system

A technology of satellite communication system and closed-loop power control, which is applied in the field of satellite communication to achieve adaptive uplink power control, improve the quality of satellite communication signals, and resist rain attenuation

Inactive Publication Date: 2010-12-01
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0010] Technical problem: According to the above-mentioned factors that cause interference to the satellite signal link due to various factors in the natural environment, the present invention provides an uplink adaptive closed-loop power control method in a satellite communication system, which

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  • Uplink self-adaptive closed loop power control method for satellite communication system
  • Uplink self-adaptive closed loop power control method for satellite communication system
  • Uplink self-adaptive closed loop power control method for satellite communication system

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Embodiment Construction

[0063] For the convenience of description, we assume the following application examples, such as Figure 7 Shown: The system includes a satellite, an earth station and a ground control center. The earth station continuously sends signals to the satellite for a period of time, and the ground control center implements power control on the earth station.

[0064] The power control algorithm based on binary search growth is used in the ground control center to update the power amplification factor of the earth station at the next moment. Before the system is running, first set the flag position to 0, and set the maximum and minimum power magnifications as the initial settings. The specific steps after the system is running are:

[0065] Step 1. Calculate the bit error rate of the current signal.

[0066] Step 2. Query the database for the previous flag bit value of the earth station.

[0067] Step 3. Update flag bits:

[0068] (1) If the current bit error rate is within the al...

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Abstract

The invention discloses an uplink self-adaptive closed loop power control method, which is applied to a satellite communication system. The interference with a satellite signal link from the factors, such as environment is eliminated by a binary search increasing-based power control algorithm. A ground control center is introduced into the satellite communication system for analyzing the error rate of a signal; and the power amplification factor at the next moment is calculated by adopting the binary search increasing-based power control algorithm, and various interferences, such as surrounding and the like, are quickly and accurately sensed, so interference is eliminated by self-adaptive power control. The satellite communication system at least comprises a geostationary satellite, an earth station, and the ground control center; a signal carrier is transmitted between the earth station and a satellite; and the ground control center manages a plurality of adjacent earth stations and sends power control commands to the plurality of adjacent earth stations to eliminate the interference with the satellite signal link from the factors, such as environment and the like.

Description

technical field [0001] The invention relates to an uplink self-adaptive closed-loop power control method applied to a satellite communication system, in particular to a control method for controlling transmission power based on a bit error rate of a received satellite signal, and belongs to the technical field of satellite communication. Background technique [0002] Satellite communication is the radio communication carried out by multiple earth stations (including land, water surface and atmosphere) on the earth using artificial communication satellites in the air as relay stations. The communication satellite consists of several transponders, several antennas, position and attitude control, telemetry and command, and power supply subsystems. Its main function is to transmit signals from various earth stations. [0003] A number of phenomena can cause signal loss when transmitting through the Earth's atmosphere. These phenomena include: atmospheric absorption (gas effect)...

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Application Information

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IPC IPC(8): H04W52/08H04W52/24
Inventor 孙力娟方玥超肖甫叶晓国王汝传郭剑黄海平
Owner NANJING UNIV OF POSTS & TELECOMM
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