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Off-line frame plan burst synchronization method and system

A burst synchronization and planning technology, applied in the field of satellite reconnaissance, can solve the problems of sudden time deviation, deviation, and inability to obtain wireless signal transmission delay, and achieve the effect of low cost and simple system implementation.

Pending Publication Date: 2022-04-15
SICHUAN RUNZE JINGWEI INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Since this system belongs to the reconnaissance system, the transmission delay of the wireless signal cannot be obtained by means of distance measurement. At the same time, the system and the satellite ground station to be reconnaissance are generally not located at the same location, resulting in the burst time received by the system and the frame plan. There is a deviation in the described burst moment
In addition, system clock drift can also cause sudden time deviations

Method used

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  • Off-line frame plan burst synchronization method and system
  • Off-line frame plan burst synchronization method and system
  • Off-line frame plan burst synchronization method and system

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Embodiment Construction

[0061] The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0062] Since the satellite network we want to monitor is not designed by ourselves, we usually need to use various signal analysis tools to extract signal characteristic parameters, such as: unique code, decoding specifications, scrambling code specifications and frame plan specifications, and then According to these parameters to design our demodulation equipment. In the traditional satellite monitoring system, the adaptive carrier receiving equipment can only traverse all the specifications during decoding to decode the correct data. The overall receiving symbol rate of such equipment is low (reason: the receiving symbol rate is heavily dependent on the speed of the decoder, if multiple decoders are used, a lot of logic resources will be added), and the CRC indication must be carried in the baseband fra...

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Abstract

The invention discloses an off-line frame plan burst synchronization method and system, and the method achieves burst frame receiving synchronization based on an off-line frame plan, and comprises the following steps: obtaining ideal occurrence moments of all bursts in a frame period, and forming an ideal occurrence moment sequence; actual occurrence moments of all bursts in one frame period of the ith frame are measured, and an actual occurrence moment sequence is formed; according to the ideal occurrence time sequence and the actual occurrence time sequence of the ith frame, calculating to obtain a burst receiving correction value delta i of the ith frame; and correcting the burst receiving moment of the (i + 1) th frame by using the burst receiving correction value delta i to realize burst frame receiving synchronization. According to the synchronization method, burst receiving synchronization is realized based on the off-line frame plan, burst frame receiving synchronization is realized without receiving master station signaling, and TDMA small station data detection and receiving can be realized.

Description

technical field [0001] The disclosure belongs to the technical field of satellite reconnaissance, and in particular relates to an off-line frame plan burst synchronization method and system. Background technique [0002] Satellite communication is simply the communication between radio communication stations on the earth (including the ground and the lower atmosphere) using satellites as relays. The satellite communication system consists of two parts: satellites and earth stations. The characteristics of satellite communication are: the communication range is large; as long as it is within the range covered by the radio waves emitted by the satellite, communication can be carried out from any two points; it is not easily affected by land disasters (high reliability); as long as the earth station circuit is set It can be opened immediately (the circuit is opened quickly); at the same time, it can be received in multiple places, and it can economically realize broadcasting a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04B7/212H04W56/00H04L7/00H04J3/06
Inventor 杨国巍王远庆
Owner SICHUAN RUNZE JINGWEI INFORMATION TECH CO LTD