Design and implementation of airborne telemetry transmission system

In order to ensure the safety of flight test,the telemetry parameters that influence the safety of flight need to be sent to ground real-time monitoring system.In this paper,a telemetry system based on PCM frame structure was designed according to the standard of IRIG106.The compositions,working principle,design requirements and parameter calculation of the telemetry transmission system were mainly introduced,including the power spectral density,frame structure,carrier frequency of transmitter,cable transmission and microwave propagation.An example was given to expatiate.The flight test showed the system was applicable for real-time monitoring with good stability and reliability.