The talk is going to be given in Japanese.
Time: Friday, April 19, 2024 at 16:45-18:15
Method: Zoom and PandA
– The URL of Zoom will be announced via faculty’s mailing list 3 days
before the colloquium.
– The lecture material will be available in PandA at 16:15 on the day
of the colloquium.
– Note that there will be no recording and streaming of any lectures at this year’s colloquium.
Speaker: Prof. Kentaro Saito (Tottori University)
Title:
Micro-Millimeter bands Radio Propagation and Channel Modeling Research for Beyond 5G system
Abstract:
As the commercial service of the 5G system since 2020, millimeter and
higher frequency band communication technologies are expected to
realize future communication systems with large capacity, low latency,
and massive connectivity. However, the actual communication
performance deeply depends on the radio propagation characteristics,
understanding these characteristics is essential for the system
design. In this lecture, the radio propagation characteristics in the
micro-millimeter band and channel modeling research are introduced.
今回の講演は日本語で行われます．
日時: 2024年 4月 19日(金) 16:45-18:15
手段: ZoomおよびPandA
ZoomのURLは開催3日前に研究科メーリングリストでお知らせします．
講演資料は開催当日の16時15分にPandAに掲載します．
今年度の談話会では，講演の録画・ストリーミング配信は一切行いません．
講演者: 齋藤 健太郎教授（鳥取大学）
講演タイトル:
Beyond 5Gシステムのためのマイクロ-ミリ波帯電波伝搬とチャネルモデリング研究
概要:
2020年の第5世代移動通信システムの商用サービス展開を1つのきっかけとして，
ミリ波帯以上の高周波数帯無線は大容量・低遅延・多数端末接続を実現する
将来移動無線通信システムの実現に無くてはならないものとなっている．
しかし現実には無線通信システムの性能は電波伝搬特性に依存しており，
最適なシステム設計のためには伝搬特性への理解が欠かせない．
本講義ではマイクロ-ミリ波帯電波伝搬特性やチャネルモデリング研究について紹介する．
The talk is going to be given in English.
Time: Friday, May 17, 2024 at 16:45-18:15
Method: Zoom and PandA
– The URL of Zoom will be announced via faculty’s mailing list 3 days
before the colloquium.
– The lecture material will be available in PandA at 16:15 on the day
of the colloquium.
– Note that there will be no recording and streaming of any lectures at this year’s colloquium.
Speaker: Prof. Charles Lin
(Distinguished Professor, Department of Earth Sciences, National Cheng Kung University, Taiwan)
Title: Observations of ionosphere responses to forcing from Sun to Earth’s surface using Taiwan’s satellite missions, FORMOSAT/COSMIC
Abstract:
FORMOSAT7-COSMIC2 Mission, the follow-on mission of FORMOSAT-3/COSMIC, is consist of six satellites equipped with GNSS radio occultation payload, in-situ ion density and velocity meters, and RF beacon transmitters. The constellation launched in June 2019 is situated at the low inclination orbit of 24 degree and the radio occultation observations could cover up to 40 degree latitudes. As the operational mission takes ~5000 observations of occultations, plus 100% duty cycle of ion measurements, it provides an unprecedented opportunity to observe the three-dimensional ionosphere hourly. Taking advantage of this special design of the mission, we have discovered several exciting new phenomena during the three year period. In this presentation, we will show how the minor magnetic storm could create severe ionosphere effects; how the Antartica stratospheric sudden warming oscillated and modify the ionosphere plasma; how the mission help identify the super plasma bubble created by the gigantic volcano eruption; and how the upper atmosphere affected by the rocket launches. All these findings are in the context of coupling the ionosphere to the external forcing sources from Sun to the terrestrial surface.
今回の講演は英語で行われます．
日時: 2024年5月17日(金) 16:45-18:15
手段: ZoomおよびPandA
ZoomのURLは開催3日前に研究科メーリングリストでお知らせします．
講演資料は開催当日の16時15分にPandAに掲載します．
今年度の談話会では，講演の録画・ストリーミング配信は一切行いません．
講演者: Prof. Charles Lin
(台湾・国立成功大学 Distinguished Professor)
講演タイトル: Observations of ionosphere responses to forcing from Sun to Earth’s surface using Taiwan’s satellite missions, FORMOSAT/COSMIC
概要:
FORMOSAT7-COSMIC2 Mission, the follow-on mission of FORMOSAT-3/COSMIC, is consist of six satellites equipped with GNSS radio occultation payload, in-situ ion density and velocity meters, and RF beacon transmitters. The constellation launched in June 2019 is situated at the low inclination orbit of 24 degree and the radio occultation observations could cover up to 40 degree latitudes. As the operational mission takes ~5000 observations of occultations, plus 100% duty cycle of ion measurements, it provides an unprecedented opportunity to observe the three-dimensional ionosphere hourly. Taking advantage of this special design of the mission, we have discovered several exciting new phenomena during the three year period. In this presentation, we will show how the minor magnetic storm could create severe ionosphere effects; how the Antartica stratospheric sudden warming oscillated and modify the ionosphere plasma; how the mission help identify the super plasma bubble created by the gigantic volcano eruption; and how the upper atmosphere affected by the rocket launches. All these findings are in the context of coupling the ionosphere to the external forcing sources from Sun to the terrestrial surface.