Estimation of Multibeam Phase Difference Using Variable Bandwidth Filter

摘要：

This paper deals with an improved processing for differential phase estimation of multibeam echosounder. In order to decreases noise and increase phase difference measurement precision the low pass filter is often used. In traditional method the filter bandwidth is fixed which often selected by experience. The main drawback of this fix bandwidth filter is that it does not concern the change of seabed backscattered signals, when the seabed circumstance changes, this filter become unsuitable. Moreover the signal to noise ratio of interferometric signals in different beams of one swath is largely different, using same filter on each beam of entire swath is obviously incorrect. Here we propose to use variable bandwidth filter on different beam signals, the parameter of filter is determined by sea depth, beam angle and noise level. The performance of this new method is illustrated by data from a 300-kHz multibeam echosounder.

关键词： phase difference estimation bathymetry error multibeam echosounder adaptive filter

作者: Bin Yao Yile Zhang Haisen Li Chao Xu You Li

作者单位: National Laboratory of Underwater Acoustic Technology Harbin Engineering UniversityHarbin,Heilongjia National Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin,Heilongji

会议类型: 国际会议

会议名称: 2010 IEEE信息与自动化国际会议(ICIA 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1-5

在线出版日期: 2010-06-20（万方平台首次上网日期，不代表论文的发表时间）