The Design And Research Of Control System For VHF Communication Radio

VHF radio station possesses extensive military applications as well as civil, being of great value in research and development,such as power,water,meteorology,petroleum, forestry,exploration,coal mine,railway and so on,in order to realize the digital signal transmission of communications,remote sensing,telemetry,regional warning system and so on.The subject comes from the cooperation project "the design of MIS system" of a railway company.The author is responsible for debugging the whole radio and joint debugging with the baseband board, inclde the system debugging, and participates in every circuit module's design and component's custom.The radio station is made up of tansmitter and receiver,all the Phase-Locked-Loop(PLL) frequency synthesis, Voltage-Controlled-Oscillator(VCO) and the radio's logic control are crucial to the system.The paper begins with the analysis of receiver parameters and the structure of system,and link budget, and the theory of designing PLL frequency synthesizer and VCO, lists the related circuit and debugging methods.Then the joint test between RF radio and base band is discussed in detail,and the debugging methods as well as the bit error rate solutions are emphatically given.Finally the paper studys the radio station's logical control analysis and the system monitoring design, discusses the phase-locked loop register establishment and how to use the MCU to carry on the logical control to the phase-locked loop,and how to carry on the system monitoring to the radio station.In the article summary, the progress and some experiences of the project are given, and puts forward the proposals to the further consummation of the project.