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).

[1]  Michael T. Chryssomallis,et al.  Smart antennas , 2000 .

[2]  Md. Selim Hossain,et al.  A computationally efficient near field broadband beamformer , 2011, 2011 IEEE Third Latin-American Conference on Communications.

[3]  Rafik A. Goubran,et al.  Application of near-field optimum microphone arrays to hands-free mobile telephony , 2003, IEEE Trans. Veh. Technol..

[4]  Presila Israt,et al.  Performance of a broadband beam space antenna array processor with improved interference beam , 2010, 2010 Sixth International conference on Wireless Communication and Sensor Networks.

[5]  Lal C. Godara.  Postbeamformer interference canceler with improved performance , 1989 .

[6]  Josef A. Nossek,et al.  Smart antennas , 2001, Eur. Trans. Telecommun..

[7]  M Palmese,et al.  An Efficient Digital CZT Beamforming Design for Near-Field 3-D Sonar Imaging , 2010, IEEE Journal of Oceanic Engineering.

[8]  Rodney A. Kennedy,et al.  Nearfield beamforming using radial reciprocity , 1999, IEEE Trans. Signal Process..

[9]  Lal C. Godara,et al.  Robust near field broadband beamforming in the presence of steering vector mismatches , 2012, WAMICON 2012 IEEE Wireless & Microwave Technology Conference.

[10]  Huawei Chen,et al.  Self-Calibration-Based Robust Near-Field Adaptive Beamforming for Microphone Arrays , 2007, IEEE Transactions on Circuits and Systems II: Express Briefs.

[11]  Dahai Zhang,et al.  Robust linear matched field processor based on environmental perturbation in shallow water , 2006, 2006 IEEE Antennas and Propagation Society International Symposium.

[12]  Yaowu Chen,et al.  Optimization of the Digital Near-Field Beamforming for Underwater 3-D Sonar Imaging System , 2010, IEEE Transactions on Instrumentation and Measurement.

[13]  Shefeng Yan,et al.  Robust matched field noise suppression for towed line array , 2004, Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600).

[14]  Boaz Rafaely,et al.  Near-Field Spherical Microphone Array Processing With Radial Filtering , 2011, IEEE Transactions on Audio, Speech, and Language Processing.

[15]  O. L. Frost,et al.  An algorithm for linearly constrained adaptive array processing , 1972 .

[16]  M. H. Er.  A New Approach To The Design Of Postbeamformer Interference Canceller , 1990, Conference Proceedings on Engineering in the Ocean Environment.

[17]  Bernard D. Steinberg,et al.  Principles of aperture and array system design: Including random and adaptive arrays , 1976 .