Multi-core beamformers: Derivation, limitations and improvements

► Multi-core beamformer methods known as DCBF and eDCBF are explored. ► Expressions relating true sources to the DCBF/eDCBF reconstructions are derived. ► Location bias of the DCBF and eDCBF source search algorithms is analyzed. ► Rigorous requirements for the applicability of both methods are formulated. ► Performance in non-ideal practical situations is examined.