What is the communication principle of Beidou short message?

Simply put, "short message" can actually be regarded as a "short message" that people usually use now. A short message can post information of 140 words, and can locate and display the publisher's position. In addition, in the ocean, desert, wild and other places where there is no communication and network, users who have installed the Beidou system terminal can locate their own position and release text information to the outside world. Changzhou Wright Technology has a generation of short message communication module, which can realize two-way communication, and the command terminal provided can carry out one-to-many broadcast transmission, which provides great convenience for various platform applications.

Beidou short message communication principle:

(1) The sender of the short message encrypts the communication application signal containing the ID number of the receiver and the communication content, and then forwards it to the station via satellite;

(2) After receiving the communication application signal, the ground central station decrypts and re-encrypts it, and then adds it to the external broadcast message to continue broadcasting, and broadcasts it to users via satellite;

(3) The receiver user machine receives the outbound signal, demodulates and decrypts the outbound message, and completes a communication.

Similar to the location function, the transmission delay of short message communication is about 0.5 seconds, and the highest communication frequency is 1 second 1 time.