Based On Mode S, Ads-b System

Automatic Dependent Surveillance technique is based on satellites orientation and aerostat surveillance technique of land to air data link communication. The concept if ADS originate from the aerostat navigation with no radar surveillance, and use satellites for surveillance.The we had the concepte of Automatic Dependent Surveillance of Broadcasting based on ADS. Then we used it in the places without radar surveillancing. Compared with tranditional radar, ADS-B has the advantage of low cost and high precision, and has a bright futhuer in high density of flight areal. Many countries have sped up in research and application in ADS-B. ADS-B is an main part in new navigator systems, and is of great value for research.In my paper, I will introduce an ADS-B data decoder designing based on DSP and FPGA. Then I penetrate into the algorithms and the implement of ADS-B systems.