Signal synchronization method, device and system for satellite communication system
A satellite communication system and signal synchronization technology, applied in the field of satellite communication, can solve problems such as increasing the complexity of satellite communication system design, and achieve the effect of reducing complexity
Active Publication Date: 2020-01-10
CHINA ELECTRONICS TECH GRP NO 7 RES INST
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[0005] Based on this, it is necessary to provide a signal synchronization method, device and system for a satellite communication system for the problem that the signal synchronization method of the traditional TtT single-hop relay mode increases the complexity of the satellite communication system design
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.
[0040] see figure 1 As shown, it is a schematic flowchart of a signal synchronization method for a satellite communication system according to an embodiment of the present invention. The signal synchronization method of the satellite communication system in this embodiment, comprises the following steps:
[0041]Step S110: Obtain the first transmission delay of the feeder link of the satellite communication system, and obtain the second transmission delay of the user link of the satellite communication system; wherein, the feeder link is between the ground gateway stati...
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The present invention relates to a method, a device and a system for signal synchronization of a satellite communication system. The method comprises: obtaining the first transmission delay of the feed link of a satellite communication system and the second transmission delay of the user link of the satellite communication system, obtaining a time sequence regulation value according to the difference of the first transmission delay and the second transmission delay, transmitting the time sequence regulation value to a communication terminal, and regulating a signal emission time sequence according to the time sequence regulation value through the communication terminal. A LTE downlink transmission channel is ground gateway station-satellite-communication terminal, the TtT uplink transmission channel of the communication terminal is communication terminal-satellite, and for a receiver of the satellite after regulation, the subframe boundaries of the TtT uplink transmission and the LTE downlink transmission are aligned to satisfy the signal synchronization requirement of the TtT and LTE transmission modes with no need for improvement of a TtT physical layer so as to reduce the complexity of the satellite communication system design while realizing signal synchronization.
Description
technical field [0001] The invention relates to the technical field of satellite communication, in particular to a signal synchronization method, device and system of a satellite communication system. Background technique [0002] The mobile communication system based on geosynchronous orbit satellites (hereinafter referred to as the satellite communication system) has the incomparable wide coverage characteristics of the terrestrial mobile communication system, but the propagation delay much higher than that of the terrestrial mobile communication system also brings many challenges to the system design . Especially for voice services with high real-time requirements, the design of the satellite communication system needs to consider minimizing the negative impact of the long delay of the satellite communication channel on the voice services. [0003] Each wireless node in the satellite communication system relies on satellite relay for communication. In order to reduce the...
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IPC IPC(8): H04B7/185H04W56/00H04J3/06
CPCH04B7/18513H04B7/18582H04J3/0682H04W56/0045
Inventor 刘为温文坤张景闵铁锐
Owner CHINA ELECTRONICS TECH GRP NO 7 RES INST