A multi-mode satellite communication terminal and method with multi-antenna lines

Abstract

The invention discloses a multi-mode satellite communication terminal with multiple antenna lines and a method thereof. The multi-mode satellite communication terminal includes: a first antenna access line, a second antenna access line, a multi-mode switching control module and a channel selection circuit Under the action of the multi-mode switching control module, whether to connect the selected antenna access line as a communication channel, the selected antenna access line is the first antenna access line or the second antenna access line. The embodiment of the present invention enables the entire multi-mode satellite communication terminal to support multiple antenna line access to realize multi-channel communication, and a channel selection circuit is built between multiple antenna access lines and the multi-mode switching control module to control only The signal of one antenna can enter the main control module of each standard, based on this antenna, the functions such as signal transmission and reception of multi-mode satellite communication terminals can be realized.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a multi-mode satellite communication terminal and method with multiple antenna lines. Background technique [0002] The satellite system uses satellites to provide users with positioning, navigation, surveying and mapping, monitoring, and timing services. Satellite positioning has the characteristics of full-time, all-weather, high-precision, continuous real-time navigation, positioning and timing, so it plays a vital role in economic development, social construction and management, scientific research, disaster assessment and prevention and control, and military fields. Its role is related to national defense security and all aspects of people's lives. At present, there are four global positioning satellite systems (GNSS) in the world: GPS (Global Positioning System) of the United States, GLONASS (Global Navigation Satellite System) of Russia, Galileo of Europe ...

AI Technical Summary

Problems solved by technology

In the current actual mode, one antenna is connected to the main control module under a communication system, and the antenna connected to one interface is connected to the main control module to realize the communication, and finally depends on the only antenna to receive satellite positioning signals. Currently, most If a satellite communication terminal uses a passive antenna for satellite communication, and the passive antenna is easily limited by the length of the coaxial cable, the communication rate will be reduced or the communication will fail in a complex geographical environment; The antenna needs to be inserted into the active interface on the satellite communication terminal. If the interface on the entire active antenna is damaged or pulled out, the communication terminal will not be able to receive satellite communication signals based on the active antenna, and the active antenna depends on the active interface from the active interface. For power supply, it is also necessary to maintain good conductivity on the active antenna access line

[0004] The existing multi-mode satellite communication terminals are more common in dual-mode satellite communication terminals. figure 1 and figure 2 It shows a schematic structural diagram of a multi-mode satellite communication terminal. There are two types of satellite communication main control modules in this dual-mode satellite communication terminal, as well as antenna access circuits for each standard, and antenna connection circuits for each standard. The incoming line can be a dual-mode antenna access line, or two single-mode antenna access lines, that is, when each antenna is connected to a dual-mode satellite communication terminal, each antenna needs to meet the multi-mode The communication function requirements under the satellite communication terminal are currently unable to simply realize the simultaneous access of two antenna access lines to the multi-mode satellite communication system, that is, the expansion of the single-antenna line to the multi-antenna line mode can support the multi-mode satellite communication system. The antenna of the existing multi-mode satellite communication system should be connected to the antenna access line by a multi-mode antenna (generally a multi-mode active antenna), so as to realize the signal sending and receiving function for each system of the multi-mode satellite communication terminal , to ensure that the main control module under each standard in the multi-mode satellite communication terminal can normally send and receive satellite signals externally, and different single-standard antennas (such as multiple passive antennas) can also be connected to the antenna access line to realize multi-mode The signal sending and receiving function of each standard of the multi-mode satellite communication terminal ensures that the main control module of each standard in the multi-mode satellite communication terminal can normally send and receive satellite signals to the outside world. It can be seen that if only one antenna line can work, then the final It can only rely on the only one antenna working line to complete external transmission and reception of satellite signals, and after each line involved in the prior art is fixedly connected to the antenna, it cannot be adapted to re-connect another antenna based on a different antenna in a complex environment. The possibility of line access, which makes it impossible for multi-mode satellite communication terminals to perform switching control in response to changes in the status of specific antenna lines. How to ensure that multiple antenna lines can be applied to multi-mode with or without antenna access The communication control of the satellite communication system needs the present invention to solve and overcome

Images