By exploiting the spatial diversity among different signals, anti-jamming communications can be accomplishing using antenna arrays. In this paper, we discuss the self-recovery problem for antenna array wireless systems after the communication link is broken due to abrupt environmental changes. In particular, we derive a novel approach that can extract the desired signal from heavy interference without using a priori spatial information of the desired signal or jamming sources. We show how this new method can be modified to handle intersymbol interference and demonstrate its effectiveness using computer simulations. Results from field experiments show that the new approach can reliably reject interference or jamming sources and recover the desired signal under 0 dB C/I.
['Murat Torlak', 'Guanghan Xu', 'Hui Liu']
A self-recovery scheme in anti-jamming communications