Data Acquisition And Processing In Digital Private Network Wireless Communication

With the development of wireless communication technology and digital signal processing technology,the advantages of digital are more and more obvious.Private network wireless communication have been transforming into digitization.In this area,the typical application is digital interphone.At present our country is promoting digital intercom system construction,and issued the relevant policies,which greatly promote and encourage the process of our country's special digital wireless mobile communication system.Therefore this research has certain practical significance and market value.Digital private mobile radio(dPMR)is a digital walkie-talkie standard which released by the European telecommunications standards institute.It's a very common air interface of digital mobile communication.By virtu of its advanced features,it is very suitable for civilian field of digital interphone.This research proposes an embedded foundation design scheme about data acquisition and processing of private network wireless communication based on dPMR,and completes the design and implementation of the software system on the basis of a high-performance low-power low-cost hardware platform and the theoretical basis of data acquisition and digital signal processing technology.The major research contents are as follows:1,the research of dPMR standard protocol and the theory of digital signal processing.2,introducing the structure of the hardware platform we have chosen.And And analyzing the performance and characteristics of each component unit.3,Layered software platform was designed and implemented,it consists of device driver layer and application layer module.The device driver layer is designed to serve the upper application.It's the bridge between application layer module and hardware,therefore they are detailedly designed in this research.The major function of the software we designed is to realize and control the basic link of digital wireless communication with the outside world,including voice input,voice output,rf transmitting and rf receiving.