Monitoring method applicable to navigation uploading link
A link and monitoring terminal technology, applied in the field of satellite navigation, can solve problems such as link interference cannot be ruled out, and achieve the effects of strong practicability, simple implementation, and wide application range
Active Publication Date: 2017-03-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
Moreover, usually only the output of the transmitting terminal is measured, that is, the generating unit of the radio frequency signal, and the interference of the subsequent link cannot be ruled out.
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[0024] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:
[0025] The navigation uplink injection link and the connection method of the monitoring terminal are as follows: figure 1 shown. The workflow of the navigation uplink injection link is as follows: the satellite ground management and control center generates the navigation uplink injection message according to the use requirements, and sends it to the launch terminal through the monitoring unit to form a frame into the navigation message up note command; after the launch terminal receives the up note command, Analyze the navigation uplink injection message, and when the verification is correct, perform pseudo-code spread spectrum, carrier modulation, power control, and up-conversion on the navigation uplink injection message to generate a navigation uplink injection signal and send it to the power amplifier. The power-amplified navigation uplink inje...
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The invention discloses a transmission channel delay, transmission signal power, frequency offset, signal-to-noise ratio measurement and uploaded information correctness monitoring method applicable to a satellite navigation uploading link. The specification describes that a monitoring terminal is added at an antenna coupling output end; in cooperation with monitoring software, the transmission channel delay, the uploaded signal transmission power and the signal-to-noise ratio are measured online in real time; uploaded telegraph text information is received and analyzed in real time; furthermore, correctness comparison and error processing of the uploaded telegraph text information are completed; and thus, monitoring on the uploading link is carried out. By means of the monitoring method disclosed by the invention, monitoring is carried out at a transmission end; influence from uploaded telegraph text generation to the whole uploading link at the transmission end on uploaded information is included; ground uploaded information can be comprehensively monitored; and the monitoring method has the characteristics of being simple to realize, high in practicability, wide in application range and high in monitoring precision, and is applied in multiple projects, such as a ground management station of a Beidou satellite navigation system.
Description
technical field [0001] The invention relates to a method for measuring the time delay of an uplink injection link transmission channel, transmission signal power, frequency deviation, signal-to-noise ratio and the correctness of uplink injection information in the field of satellite navigation. Background technique [0002] The navigation uplink injection link is composed of the satellite ground management control center and the uplink injection signal transmission system. The task of the navigation uplink injection system is to regularly inject key navigation messages such as broadcast ephemeris, satellite clock difference and satellite almanac into the satellite to ensure that the user's positioning and timing accuracy is guaranteed in a timely and effective manner. It is the management of the navigation satellite by the ground satellite operation control system. aisle. [0003] The ground navigation uplink injection system not only completes the message injection functio...
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IPC IPC(8): H04B17/10
CPCH04B17/101H04B17/102H04B17/104
Inventor 左兆辉王跃李刚尹继凯
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP