Temporal domain processing for a synthetic aperture array

Seungil Kim; Dae Hee Youn; Chungyong Lee

doi:10.1109/JOE.2002.1002487

Temporal domain processing for a synthetic aperture array

Seungil Kim, Dae Hee Youn, Chungyong Lee

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

A method for the synthesis of an aperture with improved bearing resolution and signal gain is described. The proposed method temporally synthesizes data from an overlap correlator, which is obtained by aperture domain averaging of phase differences. Previous studies, such as extended towed array measurements (ETAM), had a restriction in that the overlapped hydrophones between successive measurements of a towed array were required to have identical positions in space. In this paper, however, it is shown that the phase correction factors can be estimated without restriction on the positions of the overlapped hydrophones. This implies that the proposed method is able to utilize more snapshots to extend the towed array. Simulation results showed that the proposed method resulted in higher estimation accuracy than ETAM. In addition, the effects of coherency and other systematic errors on the proposed method were examined.

Original language	English
Pages (from-to)	322-327
Number of pages	6
Journal	IEEE Journal of Oceanic Engineering
Volume	27
Issue number	2
DOIs	https://doi.org/10.1109/JOE.2002.1002487
Publication status	Published - 2002 Apr

Bibliographical note

Funding Information:
Manuscript received October 18, 2000; revised March 14, 2001. This work was supported in part by the Underwater Acoustics Research Center under Project UA-22. The authors are with the Department of Electrical and Electronic Engineering, Younsei University, Seoul 120-749, Korea. Publisher Item Identifier S 0364-9059(02)00654-4.

All Science Journal Classification (ASJC) codes

Ocean Engineering
Mechanical Engineering
Electrical and Electronic Engineering

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10.1109/JOE.2002.1002487

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title = "Temporal domain processing for a synthetic aperture array",

abstract = "A method for the synthesis of an aperture with improved bearing resolution and signal gain is described. The proposed method temporally synthesizes data from an overlap correlator, which is obtained by aperture domain averaging of phase differences. Previous studies, such as extended towed array measurements (ETAM), had a restriction in that the overlapped hydrophones between successive measurements of a towed array were required to have identical positions in space. In this paper, however, it is shown that the phase correction factors can be estimated without restriction on the positions of the overlapped hydrophones. This implies that the proposed method is able to utilize more snapshots to extend the towed array. Simulation results showed that the proposed method resulted in higher estimation accuracy than ETAM. In addition, the effects of coherency and other systematic errors on the proposed method were examined.",

author = "Seungil Kim and Youn, {Dae Hee} and Chungyong Lee",

note = "Funding Information: Manuscript received October 18, 2000; revised March 14, 2001. This work was supported in part by the Underwater Acoustics Research Center under Project UA-22. The authors are with the Department of Electrical and Electronic Engineering, Younsei University, Seoul 120-749, Korea. Publisher Item Identifier S 0364-9059(02)00654-4.",

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AU - Youn, Dae Hee

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Y1 - 2002/4

N2 - A method for the synthesis of an aperture with improved bearing resolution and signal gain is described. The proposed method temporally synthesizes data from an overlap correlator, which is obtained by aperture domain averaging of phase differences. Previous studies, such as extended towed array measurements (ETAM), had a restriction in that the overlapped hydrophones between successive measurements of a towed array were required to have identical positions in space. In this paper, however, it is shown that the phase correction factors can be estimated without restriction on the positions of the overlapped hydrophones. This implies that the proposed method is able to utilize more snapshots to extend the towed array. Simulation results showed that the proposed method resulted in higher estimation accuracy than ETAM. In addition, the effects of coherency and other systematic errors on the proposed method were examined.

AB - A method for the synthesis of an aperture with improved bearing resolution and signal gain is described. The proposed method temporally synthesizes data from an overlap correlator, which is obtained by aperture domain averaging of phase differences. Previous studies, such as extended towed array measurements (ETAM), had a restriction in that the overlapped hydrophones between successive measurements of a towed array were required to have identical positions in space. In this paper, however, it is shown that the phase correction factors can be estimated without restriction on the positions of the overlapped hydrophones. This implies that the proposed method is able to utilize more snapshots to extend the towed array. Simulation results showed that the proposed method resulted in higher estimation accuracy than ETAM. In addition, the effects of coherency and other systematic errors on the proposed method were examined.

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Temporal domain processing for a synthetic aperture array

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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