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High-performance navigational satellite space signal quality assessment method

A signal quality assessment and navigation satellite technology, which is applied to satellite radio beacon positioning systems, measurement devices, radio wave measurement systems, etc. Integrity effect

Inactive Publication Date: 2013-04-10
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

[0005] However, since the above-mentioned methods only analyze the quality of navigation signals from certain aspects, there is still no relatively complete monitoring and evaluation method system for satellite navigation signal quality at home and abroad, and it is impossible to accurately determine the evaluation parameters and parameters that can fully reflect the quality of space navigation signals. Parameter expression

Method used

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  • High-performance navigational satellite space signal quality assessment method
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  • High-performance navigational satellite space signal quality assessment method

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Embodiment Construction

[0029] The technical solution adopted by the present invention to solve its technical problems mainly comprises the following steps:

[0030] Step 1: Use an antenna with higher gain (antenna gain greater than 20dBi) to receive downlink signals from navigation satellites;

[0031] Step 2: The downlink signal of the navigation satellite is divided into three channels after being amplified with low noise;

[0032] Step 3: Monitoring and evaluation of individual signal elements:

[0033] One of the signals is distributed to standard measuring equipment, and the power, bandwidth, center frequency, modulation characteristics, and waveform characteristics of the signal are monitored in real time.

[0034] The second signal is collected through signal acquisition (for high-precision off-line analysis, the sampling frequency must be greater than or equal to 150MHz, and the number of bits is greater than or equal to 14) and stored in the data disk array.

[0035] The other way is sent...

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Abstract

The invention provides a high-performance navigational satellite space signal quality assessment method. A downlink signal of a navigational satellite is received by an antenna with a high gain at first, the downlink signal of the navigational satellite is amplified by low noises, and the amplified downlink signal is divided evenly into three lines for monitoring and evaluating of individual signals of the signal, and comprehensive analysis and evaluation of the signal are performed finally. The high-performance navigational satellite space signal quality assessment method is capable of evaluating the receiving quality of a downlink signal of the satellite in a high-accuracy, comprehensive and multilevel mode, and being widely applied to analysis and processing of data of other navigational systems.

Description

technical field [0001] The invention relates to a signal evaluation method. Background technique [0002] Satellite navigation signal is one of the most important components of the navigation satellite system, and it is the link between satellites, ground operation and control and users. The quality of satellite navigation signals is directly related to the realization of basic functions, key performances and indicators such as system positioning, timing and speed measurement. Monitoring and evaluation of navigation signal quality is an important means of guaranteeing the integrity of satellite navigation systems. [0003] Because satellite navigation signals are submerged in noise, at present, high-precision signal quality evaluation systems mostly use higher-gain radio frequency receiving systems: Galileo uses 25-meter and 30-meter large-caliber antenna receiving systems to monitor and evaluate the quality of satellite navigation signals; the National Time Service Center ...

Claims

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Application Information

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IPC IPC(8): G01S19/23
Inventor 贺成艳郭际卢晓春王雪
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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