RFI-SIM simulates the RFI environment to estimate the interference from terrestrial emitters into spacecraft, or vice versa. A high-fidelity simulation of the RFI environment has been developed by employing all antenna-related and radar systemrelated parameters of multiple emitters, as well as that of the desired spacecraft.
In the simulation, the real-time analysis of the interference and its effects on error budgets of a desired radar system is taken into account. This provides a reliable tool for radar system design to deal with RFI issues and to evaluate the sensitivity of various parts of a radar system including antenna pattern, RF front-end and digital processing to RFI signals.
The simulator is capable of a highfidelity, complex, and real-time simulation of RFI environment. It is flexible enough to be employed for various scenarios and for several NASA missions. RFI-SIM can perform the following in support of radar system design and performance analyses:
- Error budget analyses due to RFI on a space-borne radar system;
- Sensitivity analysis of the various radar parameters, as well as hardware specs, in the presence of RFI;
- Verification of the radar system design at several stages of RF and digital components in order to evaluate their robustness against RFI;
- Assistance in algorithm development for RFI detection and removal approach;
- Based on the available database, the RFI environment over North America at L-band has been reliably and successfully simulated and validated so it can be used for L-band space-borne radars in the RFI environment; and
- Estimation of the interference from space-borne radars into terrestrial FAA radars regarding FAA compatibility issues.
This work was done by Hirad Ghaemi and Curtis W. Chen of Caltech for NASA’s Jet Propulsion Laboratory.