Design of Low Energy Error Correcting Circuits for Communicationsby Environment Adaptive Wordlength Control

• Project/Area Number: 19860001
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: Hokkaido University
• Principal Investigator: OSHIZAWA Shingo Hokkaido University, 大学院・情報科学研究科, 特任助教 (20447080)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,115,000 (Direct Cost: ¥2,710,000、Indirect Cost: ¥405,000); Fiscal Year 2008: ¥1,755,000 (Direct Cost: ¥1,350,000、Indirect Cost: ¥405,000); Fiscal Year 2007: ¥1,360,000 (Direct Cost: ¥1,360,000)
• Keywords: 無線通信 / VLSII設計 / Viterbi復号器 / 低消費電力 / VLSI設計

Research Abstract

通信環境が良好と劣悪な場合で求められる誤り訂正能力が異なることに着目し、通信環境に応じて回路の演算語長を適応的に制御することで誤り訂正回路の消費エネルギー量を削減する手法を開発した。提案手法をViterbi 復号器に回路実装して消費電力解析を行った結果、マルチパスフェージング通信環境において消費電力を最大30%程度削減する効果を確認できた。

Research Products

• [Journal Article] Use of a Variable Wordlength Techniquein an OFDM Receiver to Reduce Energy Dissipation (2008)
  • Author(s): Shingo Yoshizawa, Yoshikazu Miyanaga
  • Journal Title: IEEE Transactions on Circuit and Systems-I : Regular Paper Vol.55, No.9 Pages: 2848-2859
  • Peer Reviewed
• [Journal Article] Yoshikazu Miyanaga, Kobchai Dejhan, "NewPAPR Reduction in OFDM Systems Using Cryptogram Technique and Hybrid of PTS-APPR Methods (2008)
  • Author(s): Chusit Pradabpet, Shingo Yoshizawa
  • Journal Title: IEICE Transactions onFundamentals Vol.E91-A, No.10 Pages: 2973-2979
  • Peer Reviewed
• [Journal Article] VLSI Implementationof a Complete Pipeline MMSE Detector fora 4x4 MIMO-OFDM Receiver (2008)
  • Author(s): Shingo Yoshizawa, Yasushi Yamauchi, Yoshikazu Miyanaga
  • Journal Title: IEICETransactions on Fundamentals Vol.E91-A, No.7 Pages: 1757-1762
  • Peer Reviewed
• [Journal Article] OFDM 方式コグニティブ無線における2 次元動的アーキテクチャを持つパイプライン型FFT プロセッサの設計 (2008)
  • Author(s): 吉澤真吾, 西一斗, 宮永喜一
  • Journal Title: 電子情報通信学会論文誌D Vol.J91-D, No.3 Pages: 687-695
  • Peer Reviewed
• [Journal Article] VLSI Implementation of a Complete Pipeline MMSE Detector for a 4x4 MIMO-OFDM Receiver (2008)
  • Author(s): Shingo Yoshizawa
  • Journal Title: IEICE Transactions on Fundamentals 7 Pages: 1757-1762
  • Peer Reviewed
• [Journal Article] New PAPR Reduction in OFDM Systems Using Cryptogram Technique and Hybrid of PTS-APPR Methods (2008)
  • Author(s): Shingo Yoshizawa
  • Journal Title: IEICE Transactions on Fundamentals 10 Pages: 2973-2979
  • Peer Reviewed
• [Journal Article] Use of a Variable Wordlength Technique in an OFDM Receiver to Reduce Energy Dissipation (2008)
  • Author(s): Shingo Yoshizawa
  • Journal Title: IEEE Transactions on Circuit and Systems-I : Regular Paper 9 Pages: 2848-2859
  • Peer Reviewed
• [Journal Article] OFDM方式コグニティブ無線における2次元動的アーキテクチャを持つパイプライン型FFTプロセッサの設計 (2008)
  • Author(s): 吉澤 真吾
  • Journal Title: 電子情報通信学会論文誌D 3 Pages: 687-695
  • Peer Reviewed
• [Journal Article] 無線OFDMシステムにおける残留IQ インバランスの帰還型補正の一検討 (2007)
  • Author(s): 山内保志, 吉澤真吾, 宮永喜一
  • Journal Title: 電子情報通信学会論文誌A Vol.J90-A, No.11 Pages: 779-787
  • NAID: 110007382488
  • Peer Reviewed
• [Journal Article] VLSI Design of High-Throughput SISO-OFDM and MIMO-OFDM Baseband Transceivers for Wireless LAN Networks (2007)
  • Author(s): Shingo Yoshizawa
  • Journal Title: ECTI Transaction on Electrical Eng., Electronics, and Communications(ECTI-EEC) 2 Pages: 74-81
  • Peer Reviewed
• [Journal Article] 無線OFDMシステムにおける残留IQインバランスの帰還型補正の一検討 (2007)
  • Author(s): 吉澤 真吾
  • Journal Title: 電子情報通信学会論文誌A 11 Pages: 779-787
  • NAID: 110007382488
  • Peer Reviewed
• [Presentation] A Low Power Viterbi Decoder in OFDM Communication Systems (2009)
  • Author(s): Jaeseong Kim, Shingo Yoshizawa, Yoshikazu Miyanaga
  • Organizer: International Symposium on Multimedia and Communication Technology(ISMAC)
  • Place of Presentation: タイ、バンコク
  • Year and Date: 2009-01-23
• [Presentation] New PTS Method with Coded Side Information Technique for PAPR Reduction in OFDM Systems (2008)
  • Author(s): Chusit Pradabpet, Shingo Yoshizawa, Yoshikazu Miyanaga, Sorawat Chivapreecha, Kobchai Dejhan
  • Organizer: IEEE International Symposiumon Communications and Information Technologies (ISCIT)
  • Place of Presentation: ラオス、ビエンチャン
  • Year and Date: 2008-10-28
• [Presentation] Evaluation andImplementation of Quasi-Cyclic LDPC Codesfor IEEE802.11n Based MIMO-OFDM System (2008)
  • Author(s): Xiaonan Shi, Shingo Yoshizawa, Yoshikazu Miyanaga,
  • Organizer: IEEE Conference on Soft Computing inIndustrial Applications (SMCia)
  • Place of Presentation: 北海道室蘭市
  • Year and Date: 2008-06-26
• [Presentation] Reconfigurable Two-Dimensional Pipeline FFT Processor in OFDM Cognitive Radio Systems (2008)
  • Author(s): Shingo Yoshizawa, Kazuto Nishi, Yoshikazu Miyanaga
  • Organizer: IEEE International Symposium on Circuits and Systems (ISCAS)
  • Place of Presentation: アメリカ、シアトル
  • Year and Date: 2008-05-29
• [Presentation] A Complete Pipelined MMSE Detection Architecture in a 4x4 MIMO-OFDM Receiver (2008)
  • Author(s): Shingo Yoshizawa, Yasushi Yamauchi,Yoshikazu Miyanaga,
  • Organizer: IEEE, International Symposium on Circuits and, Systems (ISCAS)
  • Place of Presentation: アメリカ、シアトル
  • Year and Date: 2008-05-23
• [Presentation] Reconfigurable Two-Dimensional Pipeline FFT Processor in OFDM Cognitive Radio Systems (2008)
  • Author(s): Shingo Yoshizawa
  • Organizer: IEEE International Symposium on Circuits and Systems (ISCAS)
  • Place of Presentation: アメリカ・シアトル
  • Year and Date: 2008-05-20
• [Presentation] A Complete Pipelined MMSE Detection Architecture in a 4x4 MIMO-OFDM Receiver (2008)
  • Author(s): Shingo Yoshizawa
  • Organizer: IEEE International Symposium on Circuits and Systems (ISCAS)
  • Place of Presentation: アメリカ・シアトル
  • Year and Date: 2008-05-19
• [Presentation] Performance Evaluation of Quasi-Cyclic LDPC Codes for IEEE802.11n Based MIMO-OFDM Systems (2008)
  • Author(s): Xiaonan Shi, Shingo Yoshizawa,Yoshikazu Miyanaga
  • Organizer: IEEE International Symposium on Communications, Control and Signal Processing (ISCCSP)
  • Place of Presentation: マルタ
  • Year and Date: 2008-03-13
• [Presentation] A Channel Estimation Method Using DCT-Based Decision Feedback in OFDM Communications (2008)
  • Author(s): Shingo Yoshizawa
  • Organizer: TESA International Conference on Embedded Systems and Intelligent Technology(ICESIT)
  • Place of Presentation: タイ,バンコク
  • Year and Date: 2008-02-27
• [Presentation] A DCT-based Decision Feedback Channel Estimation Method in OFDM Communication Systems under Fast Fading Environment (2007)
  • Author(s): Akeo Sato, Shingo Yoshizawa, Yoshikazu Miyanaga
  • Organizer: IEICE International Workshop on Smart Info-Media Systems in Bangkok (SISB)
  • Place of Presentation: タイ、バンコク
  • Year and Date: 2007-11-02
• [Presentation] A Study of Dynamic Reconfigurable FFT Processor for OFDM Based Cognitive Radio (2007)
  • Author(s): Kazuto Nishi, Shingo Yoshizawa, Yoshikazu Miyanaga
  • Organizer: IEEE International Symposium on Communications and Information Technologies
  • Place of Presentation: オーストラリア、シドニー
  • Year and Date: 2007-10-18
• [Presentation] Dynamic Reconfigurable Architecture for a Low-Power Despreader in VSF-OFCDM Systems (2007)
  • Author(s): Shingo Yoshizawa
  • Organizer: IEEE International Syamposium on Circuits and Systems (ISCAS)
  • Place of Presentation: アメリカ,ニューオリンズ
  • Year and Date: 2007-05-23
• [Presentation] Use of a Variable Wordlength Technique in an OFDM Receiver to Reduce Energy Dissipation (2007)
  • Author(s): Shingo Yoshizawa
  • Organizer: IEEE International Symposium on Circuits and Systems(ISCAS)
  • Place of Presentation: アメリカ,ニューオリンズ
  • Year and Date: 2007-05-22