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Emergency communications , digital radio power control based on the location information of the analysis and implementation of the physical layer

Author: LiXiang
Tutor: ZhangLuYong
School: Beijing University of Posts and Telecommunications
Course: Electronics and Communication Engineering
Keywords: Power Control Digital radio ARM GPS
CLC: TN914
Type: Master's thesis
Year: 2010
Downloads: 45
Quote: 0
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Abstract


With the digitization of communications equipment , traditional analog radio is also going digital road . The era of analog radio high power state can only work a few hours will become a thing of the past ; digital radio it smart digital processing , advanced communications technology support , makes it possible to achieve long working hours , plus on its own built-in GPS function , based on the position information to the control of the level of power , so that the radio can reach the people 's ideal state of use , while improving the working life of the entire system , to provide to the user a more prolonged outdoor job reliable protection. This article is a location-based information for emergency communications , digital radio power control physical layer analysis and implementation of the research in this article have been studied mainly on the following aspects : Motorola's digital radio MOTOTRBO introduction, describes the MOTOTRBO technology principle , the appearance of the structure of the walkie-talkie , and PC interface cable diagram , and some auxiliary software configuration. Second, walkie-talkie power control and simulation. Describes the advantages and disadvantages of high and low power switch , and the computer simulation . Third, the development of the walkie-talkie option board . Description ARM7 structure - based development environment , the hardware circuit schematic and PCB plans to achieve and ARM implementation of the program . Location information tracking software developed on the PC to achieve . After application on the PC with the remote intercom connection , the remote radio can be real-time position information Return on the PC , PC can automatically change the power based on the position information transmission command to the remote radio , the present study , using the VC development language environment and use the google map map and google map development language . , The actual measurement results .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication systems ( transmission system)
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