The Design And Implementation Of Broadband Communication Terminal

For future information construction requirements communication equipment must be efficient mobile communication capability and multimission operational capability,and real-time communication security ability,communication equipment will directly affect the performance of communication system effectiveness,affect the completion of information,as a result,both at home and aboard has been devoted to the study of communication equipment.At present,miniaturization,standardization,systematism research have become urgent problems for communications equipment,and multi-channel,multi-mode,multi-channel,the connectivity of communications equipment research has become a development trend of wireless communication.The study of this paper is the broadband handheld communication terminal design and implementation,focuses on the development trend and requirements of information system equipment technology in the next five to ten years,independently developed a multiband,multimode communication terminal.This communication terminal which has the characteristics of small size,low power consumption,wide frequency range and easy to carry,relates to the field of ultrashort waves.Through the efforts of the past two years,the project has completed the prototype development.Broadband communication terminal uses the software radio design thinking,applicability and flexibility through modular design to build the strong architecture,realizes the miniaturization design requirements,expanded the spectrum,covers the VHF and UHF communication frequencies,in active service helps to solve unit types of communications equipment,operation and maintenance such complicated questions.This paper analyzes the current situation and development trend of ultrashort wave communication equipment at home and abord.The main evaluation indexes of ultrashort wave communication equipment are determined.The design scheme of the whole machine is presented,the superheterodyne tansciever structure is adopted,and the digital processing scheme of low intermediate frequency is combined.The main performance indexes of the whole machine are demonstrated and analyzed in detail.According to the results of the demonstration,the distribution and principle design of each module are completed.The design of receiver design,high resolution,low noise frequency synthesizer design and broadband power amplifer design are analyzed.Connect combination module structure of miniaturization,miniaturization,flexible and human-computer interaction dictionaries design idea,realize the miniaturization of machine design and electromagnetiac compatibility design,and through the performance test,meet the design requirements.Work of this paper mainly form the miniaturization design,this paper gives a broadband handheld communication terminal design train of thought,the terminal design,circuit design and structure design of communication equipment practitioners have certain reference significance,at the same time,also provide a reference for different structure forms of communication equioment.