Study on intelligent signal processing for noise reduction of plasma wave instruments onboard scientific satellite

2014 Fiscal Year Final Research Report

• Project/Area Number: 24654157
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Space and upper atmospheric physics
• Research Institution: Kanazawa University
• Principal Investigator: KASAHARA Yoshiya 金沢大学, 総合メディア基盤センター, 教授 (50243051)
• Co-Investigator(Kenkyū-buntansha): GOTO Yoshitaka 金沢大学, 電子情報学系, 准教授 (30361976)
• Co-Investigator(Renkei-kenkyūsha): KOJIMA Hirotsugu 京都大学, 生存圏研究所, 准教授 (10215254)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 宇宙科学 / 計測工学 / 磁気圏・電離圏 / 情報通信工学 / 人工衛星 / 科学衛星 / 電波受信器 / 電磁感受耐性

Outline of Final Research Achievements

In order to obtain high-quality data from plasma wave instruments onboard scientific satellite, it is important to reduce artificial noise radiated from the other instruments implemented in the satellite. In the present research project, we studied several digital signal processing methods to suppress these artificial noises to achieve precise observation of plasma waves.
We performed the following three topics: (1) data processing algorithm for identification and suppression of interference noise mixed in the observed wave data, (2) signal processing algorithms by which significant wave phenomena are automatically recognized and extracted, and (3) direction finding method of plasma waves from the observation data contaminated by artificial noise. We applied these methods to the observation data obtained by Akebono and Kaguya spacecraft, and demonstrated that our proposed techniques are effective for the plasma wave measurements.

Free Research Field

電波情報工学