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Valid carrier-to-noise ratio attenuation C waveband compatibility assessment method based on code tracking sensitivity coefficient

A technology of sensitivity coefficient and equivalent carrier-to-noise ratio, applied in radio wave measurement system, satellite radio beacon positioning system, measurement device, etc., can solve problems such as inaccurate compatibility evaluation

Inactive Publication Date: 2013-10-23
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

Since ignoring the code tracking link may lead to inaccurate compatibility evaluation, it is necessary to introduce the influence of the interference signal on the code tracking link in the effective carrier-to-noise ratio model, so as to establish a complete compatibility evaluation model—based on the effective Carrier-to-noise ratio

Method used

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  • Valid carrier-to-noise ratio attenuation C waveband compatibility assessment method based on code tracking sensitivity coefficient
  • Valid carrier-to-noise ratio attenuation C waveband compatibility assessment method based on code tracking sensitivity coefficient
  • Valid carrier-to-noise ratio attenuation C waveband compatibility assessment method based on code tracking sensitivity coefficient

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Embodiment 1

[0035] This example gives the effective carrier-to-noise ratio attenuation based on the code tracking sensitivity coefficient when there is interference among GPS L1C / A, GPS L1C, Galileo E1OS, and BeiDou B1C signals.

[0036]Since the C-band has not been put into use and there is no definite navigation signal, it is assumed that the very typical signal GPS L1C / A in the L1 band and the interoperable signals GPS L1C, Galileo E1OS, and BeiDou B1C in the L1 band are moved to the C-band and the signals are analyzed. Compatibility between.

[0037] Step 1: Start the system and establish the space constellation simulation module. According to GNSS frequency configuration, constellation configuration including constellation orbit and number of satellites, transmit power, signal bandwidth, satellite antenna gain, signal polarization mode and other parameters, a constellation simulation module for GPS, Galileo, and BeiDou compatibility evaluation is established.

[0038] Step 2: Calcul...

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Abstract

The invention relates to the technical field of satellite navigation, and provides a valid carrier-to-noise ratio attenuation C waveband compatibility assessment method based on the code tracking sensitivity coefficient. A space constellation simulation module is built, so that the CT_SSC is calculated, the signal reception power is solved, the lumping power is solved, the equivalent noise power spectral density is solved, the maximum equivalent noise power spectral density at each position is calculated, the equivalent carrier-to-noise ratio attenuation is calculated, and the valid carrier-to-noise ratio attenuation C waveband compatibility assessment based on the code tracking sensitivity coefficient is completed. The valid carrier-to-noise ratio attenuation C waveband compatibility assessment method gives consideration to compatibility assessment inaccuracy possibly caused by a code tracking link, influences of interference signals on the code tracking link are introduced in a valid carrier-to-noise ratio model, the valid carrier-to-noise ratio attenuation can shield individual differences caused by differences of useful signals, systems and receivers, and therefore the variable quantity caused by the interference can be assessed. Therefore, results assessed by the valid carrier-to-noise ratio attenuation C waveband compatibility assessment method have higher comparability and operability.

Description

technical field [0001] The invention relates to a detection method in the technical field of satellite navigation, which is used for Global Navigation Satellite Systems (GNSS for short) C-band compatibility evaluation method based on effective carrier-to-noise ratio attenuation of code tracking sensitivity coefficient. Background technique [0002] In the context of limited L-band spectrum resources, the existence of many satellite navigation systems makes navigation services crowded. Therefore, the C-band with a frequency range of 5010MHz-5030MHz has become a candidate frequency band for global satellite navigation services. However, before any new frequency band is put into use, evaluate the compatibility of satellite navigation signals in this frequency band (compatibility means that when two or more systems work at the same time, they will not cause conflicts, as opposed to single system work. produce significant performance degradation) is an important research topic. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/30
Inventor 战兴群刘美红戴超
Owner SHANGHAI JIAO TONG UNIV
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