Beam forming for first adjacent cancellation

Abstract

A communications device includes aspects for improving reception of transmissions with first-adjacent co-channel interference signals corresponding to digitally-modulated side-bands of in-band on-channel (IBOC) broadcasted signals. The communications device may include a radio frequency (RF) signal-reception circuit including two RF-signal paths driven in response to signals received via at least two respective antennas, and configured to respond to signals carried in the respective RF-signal paths by providing pre-processed RF output signals. The communications device may further include a beam-forming circuit driven in response to signals received at the at least two respective antennas and configured and arranged to facilitate first-adjacent interference cancellation (FAC). The communications device can also include an interference-cancelling circuit configured and arranged to reduce the first-adjacent co-channel interference signals by combining a beam-forming output signal provided by the beam-forming circuit with the pre-processed RF output signals as part of a maximum ratio combining (MRC) process.