Near field broadband PIC processor with improved interference beam

A Postbeamformer Interference Canceler (PIC) processes the signals derived from an array of antennas by forming two beams, a signal beam and an interference beam. This paper presents a method to study the performance of the PIC processor using the improved interference beam (IIB) for near field broadband directional sources. The technique presented in this paper extends the idea of previously published paper for far field beamforming to near field broadband beamforming and does not require the steering delays. A number of examples presented show the effectiveness, performance and capability of distance discrimination and robustness of the proposed broadband beamformer and compare with that using PIC with conventional interference beam (CIB) and with that using optimal element space processor (ESP).