An Efficient Destructive Interference Based on Side Lobe Suppression Method in SONAR Beamforming

Vijayan Pillai S; Santhanakrishnan T; Rajesh R

doi:10.3849/aimt.01429

Authors

Vijayan Pillai S Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence
Santhanakrishnan T Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence 0000-0003-1583-9530
Rajesh R Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence

DOI:

https://doi.org/10.3849/aimt.01429

Abstract

A novel beamforming technique that resembles the principle of interference is proposed for sonar arrays to suppress the side lobes while the main lobe is kept intact. It uses two window functions. The first one is a rectangular function that produces a primary beam pattern. A secondary new window function is derived and its beam pattern is steered such that the null or trough of the main lobe of the new window coincides with the peak or crest of the first side lobe of the rectangular window and so on to other major side lobes. Pattern multiplication was used to get a final beam pattern. The approach is simulated and verified through a sonar array with 24 hydrophone sensors.

Author Biographies

Vijayan Pillai S, Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence

Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence, Government of India Thrikkakara P.O. Kochi-682021. Scientist-H, DIRECTOR
Santhanakrishnan T, Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence

Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence, Government of India Thrikkakara P.O. Kochi-682021 Kerala, India. Scientist-F
Rajesh R, Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence

Naval Physical and Oceanographic Laboratory Defence Research and Development Organisation Ministry of Defence, Government of India Thrikkakara P.O. Kochi-682021. Scientist-F

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