A nested virtual array subband beamforming system is proposed for applications where broadband signal targets are located within the near field of the array. Subband multirate processing and near field beamforming techniques are used jointly for the nested array to improve the performances and reduce the computational complexity. A new noise model, namely the broadband near field spherically isotropic noise model, is also proposed for the optimization design of near field beamformers. It is shown that near field beamforming is essential for better distance discrimination of near field targets, reduced beampattern variations for broadband signals, and stronger reverberation suppression.

Meeting Name

IEEE Sensors, 2003


Electrical and Computer Engineering

Keywords and Phrases

Array Signal Processing; Broadband Near Field Spherically Isotropic Noise Model; Broadband Signal Targets; Computational Complexity; Microsensors; Near Field Targets; Nested Sensor Array; Nested Virtual Array Subband Beamforming System; Noise Model; Optimization Design; Reverberation Suppression; Sensor Fusion; Subband Multirate Processing

Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2003 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2003