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System and method for detecting noise inside GNSS receiver

An internal noise and detection method technology, applied in the field of satellite navigation, can solve problems such as the test that does not involve the satellite navigation signal simulator receiving satellite signals, and achieve the effects of stable and reliable test results, feasible test methods, and accurate test values.

Inactive Publication Date: 2014-07-30
SHANGHAI INST OF MEASUREMENT & TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of GNSS receiver internal noise detection system and method, to solve the problem that the prior art does not relate to the test of satellite navigation signal emulator receiving satellite signal

Method used

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  • System and method for detecting noise inside GNSS receiver
  • System and method for detecting noise inside GNSS receiver
  • System and method for detecting noise inside GNSS receiver

Examples

Experimental program
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Embodiment 1

[0042] Please refer to image 3 and Figure 4 , image 3 It is a simulation device connection diagram of the GNSS receiver internal noise detection method of Embodiment 1 of the present invention; Figure 4It is a flow chart of the GNSS receiver internal noise detection method according to Embodiment 1 of the present invention.

[0043] like image 3 and Figure 4 As shown, firstly, the satellite navigation signal emulator is turned on and preheated. In this embodiment, the preheat is greater than 30 minutes, and the GNSS receiver is powered on at the same time. Next, an external frequency standard signal is connected to the reference input interface of the satellite navigation signal simulator, and the GNSS receiver is connected to the output interface of the satellite navigation signal simulator at the same time. Preferably, the accuracy of the accessed external frequency standard signal is greater than 10 times the frequency accuracy of the satellite navigation signal ...

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Abstract

The invention provides a method and system for detecting noise inside a GNSS receiver. The method comprises the steps that an external frequency standard signal is connected to a reference input interface of a satellite navigation signal simulator, and the GNSS receiver is connected to an output interface of the satellite navigation signal simulator; simulation start time and stop time, navigation frequency points and coordinate longitude and latitude values of the satellite navigation signal simulator are set; the satellite navigation signal simulator is started, the GNSS receiver collects, tracks and solves radio frequency navigation signals generated by the satellite navigation signal simulator, and original observation data are led out and stored after measurement is over; the third step is repeated until all set testing processes are completed, and the received original observation data are led out; data processing software of the GNSS receiver is used for processing the received original observation data, and measurement values of noise inside the GNSS receiver are generated.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a system and method for detecting internal noise of a GNSS receiver based on a satellite navigation signal simulator. Background technique [0002] Entering the 21st century, more and more electronic information technologies have entered our lives, and the information age has arrived. GPS (Global Positioning System, Global Positioning System) technology is also widely used in all walks of life. The establishment of the GPS system has brought great changes to navigation and positioning technology. GPS signals can be used for sea, land and air navigation, and for missiles. Guidance, precise positioning of geodesy and engineering survey, time transmission and speed measurement, etc. [0003] GNSS (Global Navigation Satellite System, Global Navigation Satellite System) receiver interior noise (Receiver Interior Noise Level) is the deviation between GNSS receiver signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 胡立志张裕马志超董莲
Owner SHANGHAI INST OF MEASUREMENT & TESTING TECH
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