Single-mode satellite communication terminal with multi-antenna interface, and method

Abstract

The invention discloses a single-mode satellite communication terminal with a multi-antenna interface, and a method. The terminal comprises a first antenna access circuit, a second antenna access circuit, a single-mode communication main control module and a channel selection circuit. The single-mode communication main control module selects whether to connect one antenna access circuit on the multi-antenna interface as a communication channel according to antenna line state information. The channel selection circuit is used for determining whether to connect the selected one antenna access circuit as a communication channel or not under the action of the single-mode communication main control module. The selected one antenna access circuit is the first antenna access circuit or the secondantenna access circuit. According to the embodiment of the invention, the whole single-mode satellite communication terminal can support the access of multiple antennas to realize multi-channel communication, and establishes the channel selection circuit between multiple antenna access circuits and the single-mode communication main control module to control the signal of only one antenna to enter the main control module, and the function of transmitting and receiving signals of the single-mode satellite communication terminal is realized based on the antenna.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a single-mode satellite communication terminal and method with multiple antenna interfaces. 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 E...

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. Power supply, also need to maintain good conductivity on the active antenna access circuit

However, the satellite communication system supported by this single antenna cannot simply realize that more than two antennas can be connected to the single-mode satellite communication system at the same time at present, that is, the expansion of the single antenna to the multi-antenna mode can support a satellite communication system, although In the patent application No. 201510479615.1, a multi-antenna satellite positioning receiving method is involved. Its essence is to communicate with the satellite positioning unit in turn through multiple antennas connected, and then compare the average value of the carrier-to-noise ratio for a period of time. Finally, the receiving antenna with the largest average value of the carrier-to-noise ratio is extracted and the satellite positioning unit is connected. This multi-antenna first guarantees that multiple antennas have been connected to the satellite communication terminal, and multiple antennas will be connected successively in the initial working mode. work, which leads to a relatively large energy consumption of the entire satellite communication terminal. Although it can finally ensure that one antenna enters the connected state to provide satellite communication signals for the entire system, it does not specifically overcome how to have antenna access in multi-antenna interface mode. Or when there is no antenna access, the technical idea to be solved is proposed, that is, the implementation basis of the patent application No. 201510479615.1 is to ensure the communication working state under the condition of multi-antenna access. If only one antenna can work, then in the end only It can be completed by relying on the working antenna. If multiple antennas can work, it needs to rely on all working antennas to be in the working state to form a final communication channel. After the antennas involved in the prior art are fixedly connected, It cannot adapt to the possibility of re-connecting the antenna in a complex environment, and it cannot perform switching control for specific changes in the antenna line status. How to ensure that multiple antenna interfaces can be used when there are antennas connected or not connected to the antenna The communication control of the single-mode satellite communication system also needs to be solved and overcome by the present invention

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