A self-calibration method of rdss navigation signal simulator based on frequency conversion
A navigation signal and frequency conversion technology, which is applied in the field of navigation systems, can solve problems such as zero value deviation, troubles in use and maintenance, troubles in obtaining precision machines, etc., and achieve the effects of saving difficulties and costs, improving accuracy, and improving calibration accuracy
Active Publication Date: 2021-11-16
HUNAN SATELLITE NAVIGATION INFORMATION TECH CO LTD
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Problems solved by technology
However, it is very troublesome to obtain the precise machine of RDSS user equipment. It is necessary to take a user equipment with very stable performance indicators to the authoritative organization for user equipment calibration for measurement and calibration
Moreover, some indicators of precision machines will vary with external factors such as time, space, temperature, humidity, and microwave anechoic room. Its use and maintenance are very troublesome, and there are often deviations in zero values. These processes have no effective self-calibration means to check
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[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] A self-calibration method of RDSS navigation signal simulator based on frequency conversion, by changing the signal system of the exit module to the inbound signal system, the process is as follows figure 2 As shown, it specifically includes the following steps:
[0023] S1. Add an inbound calibration mode to the outbound module of the RDSS navigation signal simulator.
[0024] When the RDSS navigation signal simulator enters the calibration mode, change the outbound signal system of the RDSS navigation signal simulator to the inbound system of the RDSS user equipment, and the information content carried by the outbound signal is the inbound information content. The frequency point, link and radio frequency channel of the outbound signal are consistent with the original outbound signal.
[0025] S2. In the inbound calibratio...
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The invention discloses a self-calibration method for an RDSS navigation signal simulator based on frequency conversion, which specifically includes the following steps: adding an inbound calibration mode to the outbound module of the RDSS navigation signal simulator; The inbound calibration signal at the exit of the simulator is automatically calibrated; the calibration index of the S / L transponder and its RF cable is calibrated using a general-purpose instrument; the calibrated S / L transponder and the RF cable are connected Go to the outbound and inbound ports of the RDSS navigation signal simulator to be calibrated; start the RDSS navigation signal simulator to enter the inbound calibration process, detect and measure the outbound signal indicators of the inbound system of the entire link ; Automatically analyze the inbound function module indicators, and perform automatic calibration value correction. The invention can simultaneously complete the calibration of all inbound indicators, the calibration process is fully automated, the calibration result is safe and reliable, the calibration process is simple, and the calibration efficiency and precision are improved.
Description
technical field [0001] The invention relates to the technical field of navigation systems, in particular to a calibration method for a signal simulator. Background technique [0002] Now there are four major navigation systems in the world, namely GPS in the United States, GLONASS in Russia, Galileo in the European Union, and Beidou in China. The three major foreign systems are passive positioning methods, while China’s Beidou system not only supports passive positioning methods, but also supports active positioning methods, so its navigation signal simulator also has this difference, which is divided into RNSS navigation signal simulator and RDSS navigation signal simulator two. Among them, the RNSS navigation signal simulator simulates the satellite navigation signal arriving at the user antenna interface, while the RDSS navigation signal simulator not only needs to simulate the satellite navigation signal arriving at the user antenna interface, but also needs to receive ...
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IPC IPC(8): G01S19/23
CPCG01S19/235
Inventor 张勇虎姜果平严雷徐兰霞戴景杰伍俊
Owner HUNAN SATELLITE NAVIGATION INFORMATION TECH CO LTD