Emergency Communications, Location-based Digital Radio Power To Control The Physical Layer Analysis And Study

With a variety of communications equipment become digital, traditional analog radio was also changed to digital. The time that analog radio in high-power mode can only work a few hours will be over, digital radio has superior digital processing, advanced communications technology support, enable digital radio to work longer time, combined with the digital radio built-in GPS function, based on location information to control the power, enable radio to get people's target, while increasing the working life of the whole system, provide a reliable outdoor work protection. This paper was based on emergency communication location information digital radio power control research.This paper mainly the following aspects were studied:1. Motorola company's digital radio introduction of MOTOTRBO, describes the principles of MOTOTRBO technology, radio appearance of the structure, its connection with the PC, there are some auxiliary software for the radio configuration.2. Radio power control research and simulation. Describe Benefits of control power. Show results of simulation.3. Radio option board development. Because the remote power control is required to install the auxiliary board for the radio control panel, so this section describes that based on the structure of ARM7 development environment, the hardware circuit diagram schematic, PCB and ARM program.4. The development of location information tracking software. Using PC applications connect the remote radio, remote radio can send real-time location information to PC, according to location information, PC can automatically send a command to OB, enable remote radio to change the power, so this section describes location application development on VC language, which also uses the google map, and google map language.5. Test result.