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Method for analyzing working performance of damaged satellite-earth data transmission antenna

A digital transmission antenna and analysis method technology, applied in transmission monitoring, transmission system, electrical components, etc., can solve problems such as lack of performance evaluation, overall loss of antenna channel margin analysis and evaluation, etc., to facilitate evaluation, avoid damage and The effect of unnecessary losses

Active Publication Date: 2015-03-25
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Abstract
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Problems solved by technology

In the above analysis methods of working efficiency after antenna damage, the overall loss of the antenna and the channel margin in the use of satellite communication are not analyzed and evaluated, and there are still deficiencies in the evaluation of the use efficiency of the antenna after damage

Method used

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  • Method for analyzing working performance of damaged satellite-earth data transmission antenna
  • Method for analyzing working performance of damaged satellite-earth data transmission antenna
  • Method for analyzing working performance of damaged satellite-earth data transmission antenna

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Effect test

Embodiment

[0071] The relevant technical indicators of the preset satellite-ground data transmission antenna are as follows:

[0072] Carrier frequency: 8390MHz (X-band)

[0073] Modulation method: QPSK

[0074] System bit error rate: 10 -7

[0075] Code rate: 150Mbps

[0076] Satellite ground height: 700km

[0077] Ground reception elevation angle: 5°

[0078] Coding method: convolutional coding

[0079] Satellite transmission power: 2W

[0080] Satellite Antenna Gain: 28dB

[0081] The work efficiency analysis of the damaged digital transmission antenna is as follows:

[0082] 1) Digital channel satellite-ground link

[0083] The link calculation formula when using error correction coding is as follows:

[0084] [ E b N 0 ] = [ P EIRP ] + [ Q ...

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Abstract

A method for analyzing the working performance of a damaged satellite-earth data transmission antenna comprises the steps of (1) calculating the equivalent isotropic radiated power (EIRP) of a satellite according to the output power of a satellite transmitter, satellite antenna gain and the transmission channel loss value; (2) calculating the maximum slant range R of signal transmission according to the mean terrain level of a satellite and the minimum elevation of a ground receiving antenna; (3) calculating the free space loss Lf of a signal according to the downlink carrier frequency of the satellite data transmission signal and R; (4) calculating all transmission losses L of the data transmission signal according to the atmosphere loss, the directivity loss of the receiving antenna, the polarization loss and atmosphere value of the receiving antenna and Lf; (5) calculating the bit signal to noise ratio of a received signal by means of the coding gain, the transmission code rate, the coding rate and the link margin; (6) calculating the bit signal to noise ratio actually needed by the received signal according to bit error rate requirements so as to obtain the channel margin, wherein if the margin is positive, the overall performance of the damaged data transmission antenna can still meet the requirements of a system, and the working performance of the data transmission antenna is affected otherwise.

Description

technical field [0001] The invention relates to an antenna work performance analysis method, in particular to a work performance analysis method after a satellite-to-earth digital transmission antenna is damaged. Background technique [0002] The standard parabolic data transmission antenna commonly used in satellite communication is composed of reflector, feed source, orthogonal mode coupler, uplink and downlink filters, feed source support, antenna pointing mechanism, back reinforcement structure and antenna support structure. The antenna reflection surface is widely used is a carbon / epoxy panel aluminum honeycomb sandwich structure composite reflector antenna. The reflective surface of the composite parabolic antenna is a carbon fiber honeycomb sandwich structure formed by curing the inner skin, honeycomb core, outer skin and through embedded blocks through J-47B, C, and D adhesives at medium temperature. After the antenna body is solidified and molded, the rear embedded...

Claims

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Application Information

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IPC IPC(8): H04B17/15H04B17/309
Inventor 张晓莹李志张志民尹建凤庞羽佳
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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