Angular Resolution Improvement of Ocean Surface Current Radar Based on the Khatri-Rao Product Array Processing

被引：3
|
作者：
Yamada, Hiroyoshi [1 ]
Ozawa, Naoki [1 ]
Yamaguchi, Yoshio [1 ]
Hirano, Keizo [2 ]
Ito, Hiroyuki [2 ]
机构：
[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
[2] Nagano Japan Radio Co Ltd, Nagano 3182288, Japan
来源：
IEICE TRANSACTIONS ON COMMUNICATIONS | 2013年 / E96B卷 / 10期
关键词：
ocean surface current radar; DOA estimation; Khatri-Rao product; angular resolution improvement; ORDER STATISTICS;
D O I：
10.1587/transcom.E96.B.2469
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Ocean surface current radar is a Doppler radar to observe oceanographic information using the Bragg scattering resonance mechanism. In this paper, we consider angular resolution improvement of the radar. The radar employs an antenna array with FMICW operation, then it can resolve angular distribution by Digital Beam Forming (DBF) and distance by Fourier transform of the beat signal obtained by the FMICW radar. In order to obtain sufficient angular resolution, large array length or aperture with increasing the number of elements is needed, that is often difficult to realize in the HF/VHF ocean surface current radar. In this paper we propose to apply the Khatri-Rao (KR) product array processing to the radar. To verify effectiveness of the KR product array processing in angular resolution enhancement for the ocean surface current radar, we apply the KR product array to actual experimental data set of the radar, and show that the method is available to angular resolution enhancement and Doppler spectrum improvement.
引用
收藏
页码：2469 / 2474
页数：6
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