[M-IS26_29PO1] 大気電気学

[MIS26-P03] MMSE法を適用した偏波機能を持つ二次元フェーズドアレイレーダの開発

*菊池 博史¹、Wu Ting¹、牛尾 知雄¹、商 進¹、金 寛¹、後藤 秀人²、水谷 文彦² (1.大阪大学、2.東芝)

キーワード：フェーズドアレイレーダ, MMSE法

We have been developing a polarimetric 2-D phased array weather radar which detects small scale phenomena such as tornadoes and downbursts. In this paper, we compare Beam Former method (BF), which is a conventional method in Digital Beam Forming signal processing of array antenna, with Minimum Mean Square Error method (MMSE), which is our proposed method, and discuss simulation results estimated by each method. In BF, antenna pattern is uniform and unique in the radar system, and its sidelobe level is high. As a result, if there are obstacles, for example high building, or very heavy rain area, the observation results of array antenna is imprecision in the region near them. In contrast, we can turn the null-point to interference wave direction at the same time we turn the mainlobe to the desired signal direction in MMSE.