Breaking wave detection and processing based on spectral characteristics of microwave Doppler radars and EMD

被引：0

作者：

Chen Z. ^{[1
,2
]}

Yi S. ^{[1
]}

Zhao C. ^{[1
]}

Chen X. ^{[1
]}

机构：

[1] School of Electronic Information, Wuhan University, Wuhan

[2] Collaborative Innovation Center for Geospatial Technology, Wuhan University, Wuhan

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2016年 / 44卷 / 08期

关键词：

Breaking wave; Detection; Doppler spectrum; EMD (empirical mode decomposition); Sea clutter;

D O I：

10.13245/j.hust.160818

中图分类号：

学科分类号：

摘要：

Microwave Doppler radar take use of backscatter from ocean surface to get ocean information. Breaking waves will interfere radar echo and lead to decrease of radar measurement accuracy. In this paper, threshold was set to detect breaking waves, and the location that waves break was gotten, with the characteristics that amplitude and Doppler frequency of sea clutter Doppler spectrum significantly enhanced when waves break. Processing data that influenced by breaking waves were processed by the way of EMD (empirical mode decomposition) to eliminate error caused by breaking waves. Processing of measured data shows that the detection results are consistent with the fact, and the EMD processing algorithm reduces the error in center frequency estimation and improves the accuracy of inversion algorithm. The effectiveness of this algorithm is verified by measured data. © 2016, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：85 / 88

页数：3

共 5 条

[1]

Hwang P.A., Sletten M.A., Toporkov J.V., Breaking wave contribution to low grazing angle radar backscatter from the ocean surface, Journal of Geophysical Research, 113, C9, pp. 566-568, (2008)

[2]

Harm W.M., Harm G., van Piet G., Et al., Analysis of sea spikes in radar sea clutter data, IEEE Transactions on Geoscience and Remote Sensing, 44, 4, pp. 985-993, (2006)

[3]

Lee P.H.Y., Barter J.D., Lake B.M., Et al., Lineshape analysis of breaking-wave Doppler spectra, IEE Porceedubgs-Radar, Sonar Navig, 145, 2, pp. 135-139, (1998)

[4]

Huang N.E., An Adaptive Data Analysis Method for Nonlinear and Nonstationary Time Series: The Empirical Mode Decomposition and Hilbert Spectral Analysis, (2007)

[5]

Patrick F., Gabriel R., Paulo G., Empirical mode decomposition as a filter bank, IEEE Signal Processing Letters, 11, 2, pp. 112-114, (2004)

← 1 →