Towards development of autofocusing schemes for phase compensation of synthetic aperture sonars

Autor:	V. Tonard, M. Brussieux
Rok vydání:	2002
Předmět:	Ping (video games) Beamforming Synthetic aperture radar Motion compensation Engineering Optics business.industry Acoustics Phase noise Synthetic aperture sonar business Sonar Compensation (engineering)
Zdroj:	Oceans '97. MTS/IEEE Conference Proceedings.
DOI:	10.1109/oceans.1997.624097
Popis:	This article is dedicated to the phase compensation problem associated with synthetic aperture sonar beamforming. Array movements during the time of synthesis and medium heterogeneity have to be compensated at a degree of accuracy of a fraction of wavelength to achieve the full resolution expected from theory. We present a phase noise correction scheme based on 2D correlations of conventional beam signals coming from adjacent pings. Successful compensation of ping to ping lateral displacement amplitudes up to 75 /spl lambda/ have been achieved by the proposed method on DUBM-42 actual sonar data (the DUBM-42 is a French Navy owned high resolution side looking imaging sonar at 400 kHz).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::08af1e96f7168ebc3b0d1cb3e49aaaa2 https://doi.org/10.1109/oceans.1997.624097 Zobrazit plný text záznamu