日本語
Hiroshima City University 
Graduate School of Information Sciences 
Dept. of Computer and Network Engineering 

顔写真 Associate Professor 
Takahashi Satoshi 

My website is here.  

Academic degrees
Ph.D.  Tokyo Denki University  2001/03 

Licenses and qualifications
第一級陸上無線技術士  1993/04/12 

Research Areas
Communication/Network Engineering 

Research keywords
digital television 
radio navigation 
electromagnetic applications 
cognitive radios 
radar 
MIMO 
radiowave simulation 
mobile radio propagation 
OFDM 
CDMA 

Bibliography
ゴールドスミス ワイヤレス通信工学 基礎理論からMIMO,OFDM,アドホックネットワークまで  高橋 賢 ほか訳  6章,7章, 付録B, 付録Dを執筆。  丸善株式会社  2007/05 
無線通信技術大全  高橋 賢 分担著、阪田史郎・嶋本 薫 監修  第2章を執筆。  リックテレコム  2007/02 
コンパクト移動通信辞典  小林 岳彦, 高橋 賢  丸善株式会社  2003/09 
移動通信基礎技術ハンドブック  高橋 賢 分担訳, 羽鳥光俊, 小林岳彦監修  1, 2, 4, 5, 6, 7, 8, 12, 14, 15, 16, 18, 21, 22, 24, 32, 33章の翻訳修正と未訳箇所の翻訳を担当。  丸善株式会社  2002/03 
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Papers
Research paper (international conference proceedings)  Only  Majority determination and subcarrier diversity of detecting broadcaster advised emergency wake-up signal for ISDB-T television receivers  Satoshi Takahashi  The 2017 International Symposium on Nonlinear Theory and Its Applications (NOLTA2017)  2017/12  In an emergency, broadcaster would send a special signal to wake up their idle receivers. In ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) digital television, the emergency wake-up signal is sent on one of the control signals. As the control signal is sent over several subcarriers that contain the same information, the subcarrier diversity is possible for reliably determining the signal. Because ISDB-T broadcasting signal carries video contents not only for fixed receptions but also for mobile receptions, this paper focus on determining the wake-up signal for mobile receivers. In this paper, the performance of determining the wake-up signal with the subcarrier frequency diversity is presented. Then, the performance of determining the wake-up signal is presented by misdetections and false alarms. 
Research paper (international conference proceedings)  Only  Detecting broadcaster transmitted earthquake early warning signal with AC Parity for ISDB-T digital television receivers  Satoshi Takahashi  IEICE Information and Communication Technology Forum (IEICE ICTF 2016)  The Institute of Electronics,Information and Communication Engineers  1-4  2016/07  When significant disaster occurs, certain television broadcasters can wake up their receivers with a special signal. Such wake-up televisions are already available in the world. In ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) digital television in Japan, there are two wake up methods: Emer- gency Warning System (EWS) and Earthquake Early Warning (EEW). A wake-up indication of EWS comes from a single bit of the control channel and a method of efficiently detecting the wake up signal with parity variations is known. The EEW wake-up signal, however, contains detailed information messages in addition to the wake-up indication. This paper focuses on determining only the EWS wake-up indication and proposes a method of detecting the indication. 
Research paper (scientific journal)  Only  Detection of EEW wake-Up signal with AC parity for ISDB-T television receivers  Satoshi Takahashi  IEICE Communication Express (ComEX)  The Institute of Electronics,Information and Communication Engineers  5/ 7, 203-208  2016/07  When local meteorological agencies advise an emergency alert, ISDB-T (Integrated Services Digital Broadcasting-Terrestrial) television broadcasters would send a special signal to wake up the receivers. There are two ways of waking up: "Emergency Warning System (EWS)" that advises tsunami and earthquake disasters, and "Earthquake Early Warning (EEW)" that advises significant earthquake disasters. For detecting EWS wake-up indications, the use of the parity has been proposed. The method assumed the broadcasters do not change the message except for the wake-up indication. Because we cannot apply the method to an EEW wake-up indication detection, this letter proposes a method for EEW. 
Research paper (international conference proceedings)  Only  Comparison of two majority determination methods of detecting emergency wake-up trigger for ISDB-T terrestrial digital television receivers  Satoshi Takahashi  The International Wireless Communications & Mobile Computing Conference (IWCMC 2015)  194-198  2015/08 
Research paper (international conference proceedings)  Only  Detection of emergency wake-up trigger signal with TMCC parity and subcarrier frequency diversity for ISDB-T digital television receivers  Satoshi Takahashi  10th Asia-Pacific Symposium on Information and Telecommunication Technologies (APSITT 2015)  1-3  2015/08 
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Research presentations
Oral presentation(invited, special)  [Invited Talk] A method of determining automatic wake-up signal of ISDB-T emergency warning broadcasting  IEICE Technical Report, RCS2017-xx  2017/12  To appear. 
Oral presentation(invited, special)  symmetric memoryless binary channel approximation for automatic wake-up signal transmission channel in ISDB-T emergency warning broadcasting  ITEJ Technical Report, BCT2017-76  2017/09  In emergency, the way of waking up television receivers by sending a special signal from the broadcaster has been realized. However, such mobile receivers would miss or wrongly detect the wake-up signal due to reception bit errors. On the other hand, it should be argued whether such receivers would continue waiting for the wake-up signal all the time or not, since a disaster would rarely occur. In this report, reception performance of the wake-up signal is analyzed calculating the mutual information to be obtained from a such wake-up receiver. 
Oral presentation(general)  Analysis of capture effect with characteristic function method for digital modulated signals  ITE Winter Annual Convention, 13C-3  2017/08  In general, receiving several radiowave signals interferes each other at a receiver. Under certain conditions, however, a signal having the largest magnitude controls the output at the demodulator in the receiver. The report analyses the capture effect of two digital modulation signals in terms of Rayleigh fading power fluctuation with the characteristic function method. 
Oral presentation(general)  A low-power reception method of ISDB-T emergency wake-up signal with TMCC parity  ITE Annual Convention, 13C2  2017/08  This report proposes a method of reducing the power consumption of dedicated emergency wake-up receiver for ISDB-T broadcasting signals. Both the misdetection and false alarm probabilities increase as decreasing the reception power, then the receiver tends to wrong results. The proposal reduces the power consumption by determining these probabilities. 
Oral presentation(general)  A low-power reception method of emergency wake-up signal based on TMCC parity agreement for ISDB-T mobile television receivers  IEICE Technical Report, CQ2017-59  2017/08  In ISDB-T terrestrial digital television systems, it is possible to wake up television receivers with the special signal sent from the broadcaster when in emergency. A method of reliably determining the wake-up signal has been proposed using the parity of TMCC, a control signal and also used for the wake-up signal. This report proposes decreasing the receiver power consumption by determining the reliability of the wake-up signal. The reliability is obtained comparing the bit sequence of reception TMCC with the bit sequence associated with a condition of the wake-up signal. 
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Intellectual property rights
Patent  緊急地震速報信号の受信装置及び受信方法  特願2015-125736  2015/06/23 
Patent  緊急警報放送信号の受信装置及び受信方法  特願2013-117319  2013/05/15  特開2014-225853  2014/12/04 
Patent  通信システム、通信方法、基地局、および移動局  特許公開2005-252964  2005/09/15 
Patent  音声およびデータサービス用無線通信システム  特許公開2003-283408  2003/10/03 
Patent  端末に対して送信する信号の伝送速度または送信電力を変化させる無線通信装置およびその信号送信方法  特許公開2003-163632  2003/06/06 
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Prizes
電子情報通信学会通信ソサイエティ活動功労賞(通信方式研究会幹事に対する貢献)  2016/09 
電子情報通信学会通信ソサイエティ活動功労賞(論文査読に対する貢献)  2016/09 
電子情報通信学会通信ソサイエティ活動功労賞(論文査読に対する貢献)  2012/09 
電子情報通信学会通信ソサイエティ活動功労賞(論文査読に対する貢献)  2009/09 
電子情報通信学会通信ソサイエティ活動功労賞(論文査読に対する貢献)  2006/09 
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Allotted class
解析学I演習 
情報基礎数学 
通信方式 
情報理論 
集積回路 
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Social activities
Local arrangement of technical committee of radio communication systems  2017/12-2017/12 
Reviewer of 2017 Asia-Pacific Microwave Conference (APMC 2014)  2017/05-2018/04 
Associate editor of special section on wideband systems of IEICE Transactions  2017/04-2018/03 
Technical Program Committee (TPC) member of International Conference on Communications (ICC 2017)  2017/01-2017/12 
Technical Program Committee (TPC) member of International Conference on Control, Electronics, Renewable Energy, and Communications (ICCEREC 2017)  2017/01-2017/12 
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Memberships of academic societies
The Institute of Electronics, Information, and Communication Engineers  1989/04-Present 
The Institute of Image Information and Television Engineers  2010/06-Present 
The Institute of Electrical and Electronics Engineers, Inc.  1995/04-Present 
The Information Processing Society of Japan  1990/04-Present 
Society of Information Theory and its Applications  2003/04-2008/03 
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Open lecture
ひろしまコンピュータサイエンス塾〜情報科学ってスゴイ〜  Open lecture  2012/01-2012/01  講座「通信」 
広島市研究公開  Others  2009/12-2009/12  移動無線通信、電波応用工学 
ひろしまコンピュータサイエンス塾〜情報科学ってスゴイ〜  Others  2009/12-2009/12  講座「通信」 
EXPO '09広島  Others  2009/11-2009/11  移動無線通信、電波応用 
リエゾンフェスタ  Open lecture  2009/09-2009/09 
オープンキャンパス  Open lecture  2009/08-2009/08 
リエゾンフェスタ  Open lecture  2008/09-2008/09 
オープンキャンパス  Open lecture  2008/08-2008/08 
リエゾンフェスタ  Open lecture  2007/09-2007/09 
オープンキャンパス  Open lecture  2007/08-2007/08 
公開講座  Open lecture  2006/11-2006/11  移動通信の光と影 
リエゾンフェスタ  Open lecture  2006/09-2006/09 
オープンキャンパス  Open lecture  2006/08-2006/08 
公開講座(連続講義)  Open lecture  2005/12-2005/12  電子メールは、相手に気兼ねなくメッセージを送ることができ、記録を残すことができることから、最も広く使われている道具の一つになったといえます。その一方で迷惑メールが急増し、不愉快な思いをすることも多くなりました。そこで、この講座では、インターインターネットや携帯電話のつながる仕組みや、メールが届く仕組み、社会的背景を考察することで迷惑メールを撃退する方法を探ります。 
オープンキャンパス  Open lecture  2005/08-2005/08 
基礎から学ぶ情報科学  Public lecture  2005/08-2005/08  完全撃退!迷惑メール 1. なぜ私のところに迷惑メールが来るの? 2. ネットは大人になってから? 3. これでわかったメールとネット 
模擬授業  Public lecture  2005/06-2005/06  携帯電話と暗号 
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