Abstract
SSR (Secondary Surveillance Radar system) is widely used in civil aviation in air traffic control (ATC) and military identification, the stability and precision of which influences the safety of a flight directly. As the electromagnetic environment of an aircraft is complex, it is urgent to find out which kind of interference influences the SSR mostly. Behavioral modeling is put forward in this paper to analyze the performance of SSR when electromagnetic interference (EMI) exits. By using behavioral models, the influences of pulse noise, narrowband noise and fluctuation noise to SSR could be shown. The simulation results from ADS (Advanced Design System) shows that in time domain the pulse noise which affects in a very short time and the fluctuation noise usually in low level lead to less EMI problem while the in-band narrowband noise leads to EMI problem commonly, which accords with the facts. So it turns out that behavioral modeling is an effective method to analyze EMI problems in circuit-level and system-level.
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