A novel approach to adaptive beamforming for multi-path broadband signals

A novel approach for broadband beamforming in the presence of multi-path signals is proposed based on a frequency invariant transformation. In this approach, the received array signals are first processed by a frequency invariant beamforming network and then a traditional narrowband adaptive beamformer is applied to its output. It is shown that with the proposed structure, the cancellation of the desired signal is reduced greatly and a significantly improved output SINR is achieved.