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Session B4: Interference, Jamming, and Spoofing 2

Beam Steering Adaptive Noise Cancellation with a Controlled Reception Pattern Antenna for GNSS Anti-Jamming
Jacob W. Harris and David M. Bevly, Auburn University
Location: Grand Ballroom GH
Date/Time: Wednesday, Apr. 30, 2:12 p.m.

GNSS signals are vulnerable to both intentional and unintentional interference due to low signal power at the receiver. Much research has been done to address this vulnerability. Controlled Reception Pattern Antenna (CRPA) allow for the alteration of received gain patterns, introducing the possibility to amplify or nullify signals from specific directions. Space-Time Adaptive Processing (STAP) manipulates the received gain pattern, directing nulls in the direction of jamming signals. Nullifying jamming signals is effective for maintaining access to GNSS signals in a contested environment, but not without cost. GNSS information arriving from an azimuth and elevation similar to the jamming signal will be lost or minimized. In this paper, Minimum Variance Distortionless Response (MVDR) Adaptive Noise Cancellation (ANC) is presented as an alternate anti-jamming (AJ) method to STAP in an effort to mitigate the loss or minimization of GNSS information. The analysis will be performed using simulated GPS L1 C/A signals, generated by the Safran Group’s Skydel software, that have been mixed with Additive White Gaussian Noise (AWGN).
Index Terms—Beam Steering, MVDR, CRPA, ANC, STAP, RFI, AWGN.

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