UACE: A New Method of Improving the Azimuth Resolution in the Forward-looking Sonar by Doppler Beam Sharpening Technique

Session:
Acoustic imaging
Paper:
A New Method of Improving the Azimuth Resolution in the Forward-looking Sonar by Doppler Beam Sharpening Technique
Author(s):
Haoran Wu, Jinsong Tang, Heping Zhong
Abstract:
DBS (Doppler beam sharpening) is a technique to improve radar azimuth resolution. This paper introduces the technology field of sonar, to promote forward-looking sonar azimuth resolution. 1, The DBS signal model is established, and the relationship between the theoretical azimuth resolution and the wavelength, the length of the array, the azimuth angle and the range is analyzed. 2,The incompatibility of the DBS technology in forward-looking sonar is compared with the DBS technology in radar , and the beam dwell time is improved by the method constrained beam width.3,To ensure the signal coherent superposition in one unit of range resolution unit, the range migration correction with the variable range is used.4,The correspondence between the frequency and the angle is established, to calibrate the coordinate position of the target. Finally, the simulation results show that the DBS technique can effectively improve the azimuth resolution of the forward-looking sonar.
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