Design And Implementation Of A Universal S-Band Telemetry Receiverr

Telemetry receiver is an important component of the state parameters of the measured target to obtain the flight information of the missile,UAV and other flight information,according to the parameters of the data to analyze the performance status of the target,especially when the failure of the flight line can be analyzed to provide the basis for the fault.At present,the telemetry transmitter used in fixed frequency,corresponding to the telemetry ground station is also set as a fixed frequency point in the previous test area,can meet the requirements of the use,with the current phase of the pilot area of the increasing number of flight,the more the fixed frequency point is not satisfied with a large number of tests to be subject to the same frequency control of multi frequency telemetry transmitter / receiver in recent years began to emerge in large numbers.The transmitter can be allowed to set frequency points at a certain frequency interval in the S band,and the frequency points can be flexibly adjusted during the work process.Corresponding to the telemetry receiver also to O Obihiro,multi frequency stability in the direction of high stability.In this paper,we design a universal telemetry receiver with multi frequency points,large dynamic and high sensitivity in the S band 100 MHz band S band.Based on the combination of the existing technology and innovation,the project uses a more mature super heterodyne two mixing receiving system,in which the gain control part of the receiving channel is used,and a new three stage gain control method is adopted to improve the dynamic range of the receiver.In the implementation of the frequency synthesizer,the design requirements of large bandwidth and small step are realized by using a more advanced frequency synthesizer based on direct digital frequency synthesizer and phase locked loop,and the technical parameters of the system are simulated and calculated.Through the research of this paper,the realization method of the large dynamic,multi frequency point and high sensitivity receiver is mastered,and the development and testing of the hardware is completed,.A number of research results can be transplanted to radar,communication and other areas of the receiver,the subject of the study of the receiver has been used in the author's unit of multiple projects,changes in the past each project to configure the state of the telemetry receiver,improve the efficiency of the telemetry receiver and universal,the broad application prospects.