Design of Mobile Phone Back Clip for Field Emergency Communication Based on Beidou Short Message

Aiming at the problems of poor communication reliability and poor emergency ability of communication terminals such as walkie-talkies and satellite phones, which are mainly used at present, due to limited signal coverage in the field, a field rescue terminal with reliable communication and strong emergency ability is developed. The main work of this paper is to develop the field emergency communication back clip, transmit the multimedia data in the mobile phone to the back clip through the self-made program, then send it out through the Beidou short message system, and transmit it to Tianjin Central Station by GEO satellite in space segment. After receiving and processing the signal, the multimedia information is obtained and then transmitted to the receiver, i.e. the rescue party, to greatly improve the success rate of rescue. It has important application value.