Japan Geoscience Union Meeting 2015

Presentation information


Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS29] Atmospheric Electricity

Sun. May 24, 2015 11:00 AM - 12:45 PM A01 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Yasuhide Hobara(Graduate School of Information and Engineering Department of Communication Engineering and Informatics, The University of Electro-Communications), Tomoo Ushio(Information and communication engineering department, Osaka University), Chair:Tomoo Ushio(Information and communication engineering department, Osaka University)

11:30 AM - 11:45 AM

[MIS29-10] Digital Beam Forming methods on Observation Result of Phased Array Radar

*Takuro TASHIMA1, Hiroshi KIKUCHI1, Ting Wu1, Shigeharu SHIMAMURA1, Gwan KIM1, Tomoo USHIO1, Hideto GOTO2, Fumihiko MIZUTANI2 (1.Osaka University, 2.Toshiba)

Keywords:Phased Array Radar, Digital Beam Forming, Minimum Mean Square Error method, severe phenomena

We have been developing the Phased Array Radar (PAR) which detects small scale weather phenomena. We adopt Beam Former method (BF) in the way of adaptive digital beam forming (DBF) to sharpen fan beam of elevation angle to about 1 degree. In BF, an antenna pattern is uniform in the radar system, and sidelobe level is high. As a result, a fake echo appears in the observation result in consequence of high building or heavy rain in near region.
On the other hand, in Minimum Mean Square Error method (MMSE), we can turn the null-point to inference signal direction and the mainlobe to desired signal direction. As a result, we can decrease a fake echo. However, a calculation cost of MMSE is about 200 times more expensive than this of BF.
Therefore, we propose faster MMSE method. In this presentation, we show and compare the PAR observation results of radar reflectivity and calculation time with BF, MMSE, and our proposed method.