Sensitivity testing method of spaceborne wireless receiving system under complex electromagnetic environment

A technology for system sensitivity and wireless reception, which is applied in the field of sensitivity testing of satellite wireless reception systems, can solve problems such as receiver performance changes, saturation, and sensitivity reduction, and achieve the effects of avoiding limitations, reducing complexity, and improving effectiveness

Active Publication Date: 2010-04-07
AEROSPACE DONGFANGHONG SATELLITE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this is far from the actual use state of the satellite in orbit (for the antenna to receive the signal and transmit it to the receiver). Noise and clutter and other unwanted interference signals are received, and interference signals entering the receiver may change the performance of the receiver, such as saturation, sensitivity reduction, etc.
Therefore, there are certain limitations when using wired testing

Method used

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  • Sensitivity testing method of spaceborne wireless receiving system under complex electromagnetic environment
  • Sensitivity testing method of spaceborne wireless receiving system under complex electromagnetic environment
  • Sensitivity testing method of spaceborne wireless receiving system under complex electromagnetic environment

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as image 3 , 4 As shown, it includes two steps: the wireless calibration of the sensitivity level when the wireless receiving system is not equipped with a star, and the sensitivity test under the wireless receiving system with a star.

[0034] The wireless calibration steps of the sensitivity level when the wireless receiving system is not equipped with satellites are as follows:

[0035] a In the wireless state, each wireless receiving system is tested separately;

[0036] b Set the test signal of the signal source, such as the signal is set to spread spectrum modulation, the amplitude is 20dBm, and the bandwidth is 3kHz;

[0037] c Select a certain number of frequency points in different frequency bands, which must include boundary frequency points, such as L-band 1.2GHz ~ 1.3GHz, select frequency points 1.2GHz, 1.22GHz, 1.24GHz, 1.26GHz, 1.28GHz, 1.3GHz;

[0038] d During the test of each frequency point, the turntable is stepped according to a certain step a...

Embodiment 2

[0050] Such as image 3 , 5 , 6, including three steps: wireless calibration of the sensitivity level when the wireless receiving system is not equipped with a satellite, calibration of the uplink loss when the wireless receiving system is installed with a satellite, and sensitivity testing of the wireless receiving system with a satellite.

[0051] The wireless calibration steps of the sensitivity level when the wireless receiving system is not equipped with satellites are as follows:

[0052] a In the wireless state, each wireless receiving system is tested separately;

[0053] b Set the test signal of the signal source, such as the signal is set to BPSK modulation, the amplitude is 15dBm, and the bandwidth is 50kHz;

[0054] c Select a certain number of frequency points in different frequency bands, which must include boundary frequency points, such as X-band 10.2GHz to 10.3GHz, select frequency points 10.2GHz, 10.22GHz, 10.24GHz, 10.26GHz, 10.28GHz, 10.3GHz;

[0055] d ...

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Abstract

The invention relates to a sensitivity testing method of a spaceborne wireless receiving system under complex electromagnetic environment, mainly comprising the steps of sensitivity level wireless calibration when the wireless receiving system is non-spaceborne and the sensitivity test when the wireless receiving system is spaceborne. In the method, the sensitivity defined by power flow density is converted into the sensitivity defined by power level, so as to avoid complicated procedures when the whole satellite is tested along all the directions of a rotary table and greatly simplify the sensitivity test under the complex electromagnetic environment when the wireless receiving system is spaceborne. Furthermore, the testing method in the invention is carried out in a wireless way, so as to lead the test result to be close to the practical condition of on-orbit running of the satellite, test the effect of interference transmitted out by spaceborne electronic equipment on the wireless receiving system and test the effect of the interference radiated out from the spaceborne electronic equipment on the wireless receiving system, thereby improving the effectiveness of the sensitivity test under the complex electromagnetic environment when the wireless receiving system is spaceborne.

Description

technical field [0001] The invention relates to a sensitivity testing method of a satellite wireless receiving system, in particular to a sensitivity testing method of a satellite wireless receiving system in a complex electromagnetic environment based on the wireless calibration of the sensitivity level under the condition that the wireless receiving system is not equipped with a satellite. Background technique [0002] System sensitivity is one of the most important technical indicators of satellite wireless receiving system, and the test of system sensitivity is one of the most important and most commonly applicable methods to evaluate the performance of wireless receiving system. A definition method of system sensitivity is: the power flow density (dBW / m 2 ) as the basis to define the sensitivity of the system. [0003] The system sensitivity test based on the power flow density of the wireless receiving system itself is usually carried out in a wireless way, such as f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04B17/29
Inventor 杨争光陶成华郑泽星李红宝李延东
Owner AEROSPACE DONGFANGHONG SATELLITE
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