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.
Y. R. Zheng et al., "A Nested Sensor Array Focusing on Near Field Targets," Proceedings of IEEE Sensors, 2003, Institute of Electrical and Electronics Engineers (IEEE), Jan 2003.
The definitive version is available at http://dx.doi.org/10.1109/ICSENS.2003.1279062
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
Article - Conference proceedings
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