A Null Constrained Weight Based on Focused Beam Forming

Abstract:

The performance of acoustic image measurement technique will be affected badly by coherence interference, even unable to get the noise targets image at all. A null weight constrained by zero and first derivative based on focused beam forming is proposed in this paper. The weight can put null on the given positions which are only decided by the interferences positions. The weight also has advantages in high robustness and low computation account which doesnt have to be calculated on real time. Simulations about single and multiple interferences on the condition of different SIR are proposed in the paper. And the results show that the new weight proposed in this paper can get targets image while putting nulls on the coherent interferences position.

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 2137-2142
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.2137
• Online since: February 2014
• Authors: Wei Zhou, Feng Xu
• Keywords: Coherent Terference, Focused Beam Forming, Null Constrained Weight, Underwater Image

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