Trade-Off between Bandwidth and Number of Array Elements in the Performance Enhancement of Passive Fathometer

• 作者: E. H. Huntington Jahangir Alam M. R. Frater
• 来源期刊: 声学期刊(英文)
• 学科: 医学
• 关键词: PASSIVE Fathometer CROSS-CORRELATION SNR RESOLUTION BANDWIDTH ARRAY Processing
• 年，卷（期）: 2013,（2）
• 页码范围: 16-24
• 页数: 9页
• 分类号: R73

摘要

Improved signal to noise ratio (SNR) and resolution of the ambient noise cross-correlation function (NCF) between two points help in the estimation of bottom profile of the ocean. One of the main requirements of the improvement of the SNR and resolution is collection of a large amount of data. These large amounts of data can be achieved by recording a large bandwidth ambient noise or using an array of hydrophones. This paper evaluates the performance of the array processing and compares it to the large bandwidth technique in terms of SNR and resolution of NCF. It is shown that the large bandwidth technique gives better SNR and resolution compared to the array processing technique under certain conditions. The outcome of this article finds application in the enhanced estimation of the passive fathometer.