電気学会論文誌C(電子・情報・システム部門誌)
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
複素型適応ラインエンハンサによるウインドプロファイラの視線方向速度推定
山下 勝己増田 悦久
著者情報
ジャーナル フリー

2002 年 122 巻 3 号 p. 441-447

詳細
抄録

A 1.3 GHz-pulse Doppler radar called a lower atmospheric wind profiler (LAWP) was developed by Communications Research Laboratory in 1990. The LAWP can measure lower atmospheric winds between 100 m and 3 km above the ground. However, the influence of ground clutter on LAWP measurements severely degrades the reliavility of wind velocity estimation, because LAWP detects very weak signals from clear air. On the other hand, Li has proposed a complex notch filter (CNF) by which sinusoidal signals in a quadrature sampling system can be detected. This filter is suitable for detecting complex signals, but it is very difficult to estimate an exact wind velocity by CNF, because of the influence of ground clutter and the fluctuating target. The purpose of this paper is to estimate the exact wind velocity under the above-mentioned ill conditions. The proposed signal processing consists of a complex notch filter and a complex adaptive line enhancer. Passing the received signal through the notch filter, the target signal is obtained. Then, passing this signal through the complex adaptive line enhancer, the wind velocity will be exactly estimated. The validity of this method is demonstrated by real data provided by LAWP.

著者関連情報
© 電気学会
前の記事 次の記事
feedback
Top