Narrowband main beam interference mitigation algorithms for space-time adaptive processing

We investigate space-time adaptive processing (STAP) algorithms that can mitigate narrowband main beam interference. It will be shown, through simulations for direct sequence code phase estimation, that only a form of three possible Capon beamformer implementations can do the required mitigation. Alternatively, a novel time coherent combining beamformer can be used. Both algorithms have to function in a single sample per symbol or chip mode in order to avoid mutual correlation that decreases the performance.