Electromagnetic interference to radar receivers due to in-band OFDM communications systems

Radar and communication system interoperability is an ongoing problem that is increasing due to acute spectral crowding. This paper will focus on examining the performance degradation to radar system receivers from OFDM communication signals such as WiMAX and LTE. Specifically, a simulated S-Band long range weather radar will be subjected to OFDM interference and the performance degradation measured. Notional radar systems using both incoherent and coherent radar processing techniques will be examined. The effectiveness of first order interference mitigation techniques, such as notch filtering, will be measured and compared. These types of measurements can aid design engineers and system operators as the OFDM interference becomes more prevalent.