Design And Implementation Of Function Verification Module Of 1090MHz Channel Monitoring System

In order to explore the actual use of 1090 MHz channel and ensure the development and application of ADS-B system,the function verification module of monitoring system of 1090 MHz channel is designed and implemented.Through the acquisition and analysis of the main signals in the 1090 MHz channel,the channel occupancy rate of the main signals in the channel and the relevant parameters reflecting the channel quality can be obtained,so as to verify the feasibility and effectiveness of the channel monitoring project.The main research contents are as follows:Firstly,the channel model is established according to the types and characteristics of the main signals in the channel,and the software simulation of signal acquisition and statistical analysis is realized on the MATLAB platform.The design scheme of function verification of channel monitoring is determined according to the software simulation results.Secondly,the acquisition function of other types of signals is added on the basis of the existing ADS-B receiving module.The hardware circuit system dedicated to the verification module of channel monitoring function was rebuilt to realize the high-speed data transmission interface and other functions,after the comprehensively considering of system requirements.In order to evaluate the quality of the signal intuitively and analyze the relevant parameters statistically,a PC based upper computer software system was developed,which realized the real-time display of the main signal waveform in the channel and the statistical analysis of related parameters,and realized the remote control function of the whole system.Finally,the performance parameters of the system are tested,and it is verified that the sensitivity of the signal acquisition module conforms to the requirements of civil aviation related standards,and the designed functions of the system have been achieved.Through the actual test run of the system,the monitoring and evaluation of the local 1090 MHz channel are realized.Through the operation test in real environment,the feasibility and effectiveness of the channel monitoring project are verified,and the function verification of the 1090 MHz channel monitoring system is achieved.