Adaptive Space-Time Algorithm Using Frost's and Maximin

Current state-of-the-art in global positioning system (GPS) anti-jam technology has relied on a phase array antenna that consists of $N$ antenna elements and a processing unit that performs a phase-destructive sum of any intentional and unintentional jamming up to $N-1$ signals. If this limitation is exceeded, then the GPS signal will degrade rapidly and become buried in the noise. Hence, alternative anti-jamming technologies have been sought recently. This paper describes an anti-jam method that can suppress more than $N-1$ jamming signals with a significant reduction in size, weight, and power (SWaP) and no degradation under additive white Gaussian noise (AWGN).