Angular Resolution Improvement of Ocean Surface Current Radar Based on the Khatri-Rao Product Array Processing
| Autor: | Hiroyoshi Yamada, Hiroyuki Ito, Naoki Ozawa, Keizo Hirano, Yoshio Yamaguchi |
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| Rok vydání: | 2013 |
| Předmět: |
Computer Networks and Communications
Surface ocean Computer science Ocean surface current radar Khatri-Rao Product Array processing DOA estimation law.invention law Product (mathematics) angular resolution improvement Angular resolution Electrical and Electronic Engineering Radar Physics::Atmospheric and Oceanic Physics Software Remote sensing |
| Zdroj: | IEICE Transactions on Communications. :2469-2474 |
| ISSN: | 1745-1345 0916-8516 |
| DOI: | 10.1587/transcom.e96.b.2469 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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