High-Efficiency Transmission of Linear Modulation Signals with a Saturated Amplifier

• Project/Area Number: 19360170
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: The University of Electro-Communications
• Principal Investigator: YAMAO Yasushi The University of Electro-Communications, 先端ワイヤレスコミュニケーションセンター, 教授 (10436735)
• Project Period (FY): 2007 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2007: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
• Keywords: 移動体通信 / 省エネルギー / 高周波増幅器 / OFDM / Δ-Σ変調器

Research Abstract

In order to break the limit of transmitter power efficiency for linear modulation signals used in broadband mobile communications, a novel transmitter architecture called EPWM ( Envelope Pulse Width Modulation ) transmitter has been proposed. The transmitter can be operated in the saturation region of a power amplifier nd gain maximum power efficiency. However, reducing quantization noise from EPWM rocess is a critical issue. After analyzing characteristics of the noise in detail, an ANC (Amplitude Noise Compensation) method has been proposed and validated to be effective in reducing the noise.

Research Products

• [Journal Article] Quantization Noise and Distortion Analysis of Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification (2010)
  • Author(s): E.M.Umali, K.Kawazoe, Y.Toyama, Y.Yamao,
  • Journal Title: IEICE Trans. Fundamentals, 3-A vol.E9, no.10 Pages: 1724-1734
  • NAID: 10027638095
  • Peer Reviewed
• [Journal Article] Quantization Noise and Distortion Analysis of Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification (2010)
  • Author(s): E.M.UMALI, K.Kawazoe, Y.Yamao
  • Journal Title: IEICE Transaction on Fundamentals on Electronics, Communications and ComputerSciences Volume: VOL.E93-ANo.10 Pages: 1724-1734
  • NAID: 10027638095
  • Peer Reviewed
• [Journal Article] Quantization Noise and Distortion Analysis of Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification (2010)
  • Author(s): E. M. Umali, K. Kawazoe, Y. Toyama, Y. Yamao
  • Journal Title: IEICE Trans. on Fundamentals (掲載予定)
  • NAID: 10027638095
  • Peer Reviewed
• [Journal Article] Quantization Noise and Distortion Analysis of Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification
  • Author(s): E.M.UMALI, K.Kawazoe, Y.Yamao
  • Journal Title: IEICE Transaction on Fundamentals on Electronics, Communications and Computer Sciences (採録決定, 印刷中)
  • NAID: 10027638095
  • Peer Reviewed
• [Journal Article] Quantization Noise and Distortion Analysi s of Envelope Pulse-Width Modulation (EPWM)Transmitters for OFDM Signal Amplification
  • Author(s): E. M. UMALI, K. KAWAZOE, Y. TOYAMA, Y. YAMAO
  • Journal Title: IEICE Transaction on Communications (査読中)
  • Peer Reviewed
• [Presentation] Suppression of Quantization Noise for EPWM Transmitter with 2nd-order Δ-Σ Modulator (2011)
  • Author(s): 横澤真介, 山尾泰
  • Organizer: IEEE VTC2011 -Spring
  • Place of Presentation: Budapest,査読有
  • Year and Date: 2011-03-17
• [Presentation] EPWM送信法における量子化雑音の低減法とその効果 (2011)
  • Author(s): 横澤真介、山尾泰
  • Organizer: 電子情報通信学会無線通信システム研究会
  • Place of Presentation: 横須賀
  • Year and Date: 2011-03-04
• [Presentation] EPWM送信法における量子化雑音の低減法とその効果 (2011)
  • Author(s): 禎澤真介, 山尾泰
  • Organizer: 電子情報通信学会研究技術報告RCS2010-315
  • Place of Presentation: YRP(横須賀市)
  • Year and Date: 2011-03-04
• [Presentation] EPWM送信に用いるΔ-Σ変調器の固定小数点演算化の検討 (2011)
  • Author(s): 岩城晃二、横澤真介、山尾 泰
  • Organizer: 電子情報通信学会総合大会、(CD発行)
  • Year and Date: 2011-03-01
• [Presentation] EPWM送信に用いるΔ-Σ変調器の固定小数点演算化の検討 (2011)
  • Author(s): 岩城晃二, 横澤真介, 山尾泰
  • Organizer: 電子情報通信学会2011年総合大会A-1-30
  • Place of Presentation: 東京都市大(東京)で発表予定であったが、大震災のため発表自体は中止(CD-ROM)
  • Year and Date: 2011-02-28
• [Presentation] Suppression of Quantization Noise for EPWM Transmitter with 2nd-order Δ-Σ Modulator (2011)
  • Author(s): S.Yokozawa, Y.Yamao
  • Organizer: IEEE VTC2011-Spring
  • Place of Presentation: Budapest (Hungary)
• [Presentation] EPWM送信法におけるRFバースト信号の増幅法 (2010)
  • Author(s): 高橋秀一郎、山尾泰
  • Organizer: 電子情報通信学会マイクロ波研究会
  • Place of Presentation: 那覇
  • Year and Date: 2010-11-26
• [Presentation] Quantization Noise Suppression for Envelope Pulse-Width Modulation (EPWM) Transmitters, (2010)
  • Author(s): E.M.Umali, S.Yokozawa, Y.Yamao
  • Organizer: IEEE VTC2010-Fall
  • Place of Presentation: Ottawa,査読有
  • Year and Date: 2010-10-07
• [Presentation] Suppression of Quantization Noise from EPWM Transmitter Generated near Signal Spectrum (2010)
  • Author(s): 横澤真介, 山尾泰
  • Organizer: Proc.of URSI AP-RASC '10
  • Place of Presentation: 査読有
  • Year and Date: 2010-09-25
• [Presentation] 零点を有する2次のΔ-Σ変調器を用いたEPWM送信法における量子化雑音の低減 (2010)
  • Author(s): 横澤真介、山尾泰
  • Organizer: 電子情報通信学会ソサイエティ大会
  • Place of Presentation: 大阪
  • Year and Date: 2010-09-15
• [Presentation] EPWM送信法における量子化雑音の低減法とその効果 (2010)
  • Author(s): 横澤真介, 山尾泰
  • Organizer: 電子情報通信学会2010年ソサイエティ大会B-5-82
  • Place of Presentation: 大阪府立大(堺市)
  • Year and Date: 2010-09-14
• [Presentation] EPWM送信法における搬送波近傍の量子化雑音の低減 (2010)
  • Author(s): 横澤真介、山尾泰
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 仙台
  • Year and Date: 2010-03-16
• [Presentation] Clipping&Filteringを適用したEPWM送信機によるOFDM 信号の発生 (2010)
  • Author(s): 川添浩司、エドウィンウマリ、山尾泰
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 仙台
  • Year and Date: 2010-03-16
• [Presentation] Clipping & Filtering を適用したEPWM送信機によるOFDM信号の発生 (2010)
  • Author(s): 川添浩司, E.M.Umali, 山尾泰
  • Organizer: 電子情報通信学会2010年総合大会B-5-74
  • Place of Presentation: 東北大学 (仙台)
  • Year and Date: 2010-03-16
• [Presentation] EPWM送信法における搬送波近傍の量子化雑音の低減 (2010)
  • Author(s): 横澤真介, 山尾泰
  • Organizer: 電子情報通信学会2010年総合大会B-5-75
  • Place of Presentation: 東北大学 (仙台)
  • Year and Date: 2010-03-16
• [Presentation] Quantization Noise Suppression for Envelope Pulse-Width Modulation (EPWM) Transmitters (2010)
  • Author(s): E.M.Umali, S.Yokozawa, Y.Yamao
  • Organizer: IEEE VTC2010-Fall
  • Place of Presentation: Ottawa (Canada)
• [Presentation] Suppression of Quantization Noise from EPWM Transmitter Generatednear Signal Spectrum (2010)
  • Author(s): S.Yokozawa, Y.Yamao
  • Organizer: URSI AP-RASC'10
  • Place of Presentation: 富山国際会議場(富山)
• [Presentation] Suppression of Quantization Noise for EPWM Transmitter by Costrolling Phase Modulator Output Amplitude (2010)
  • Author(s): S.Yokozawa, E.M.Umali, Y.Yamao
  • Organizer: TriSAI2010
  • Place of Presentation: 北京郵電大学(北京)
• [Presentation] Quantization Noise Suppression for Envelope Pulse-Width Modulation (EPWM) Transmitters (2010)
  • Author(s): E. M. Umali, S. Yokozawa, Y. Yamao
  • Organizer: IEEE VTC2010-Fall
  • Place of Presentation: Ottawa
• [Presentation] Clipping&Filteringを施したOFDM信号のEPWM送信雑音特性 (2009)
  • Author(s): 川添浩司、Edwin M.UMALI、山尾泰
  • Organizer: 電子情報通信学会無線通信システム研究会
  • Place of Presentation: 奈良
  • Year and Date: 2009-10-16
• [Presentation] Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification (2009)
  • Author(s): E.M.Umali, K.Kawazoe, Y.Toyama, Y.Yamao
  • Organizer: IEEE VTC2009-Spring
  • Place of Presentation: Barcelona,査読有
  • Year and Date: 2009-08-28
• [Presentation] Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification (2009)
  • Author(s): E. M. Umali, K. Kawazoe, Y. Toyama, Y. Yamao
  • Organizer: IEEE VTC2009-Spring
  • Place of Presentation: Barcelona
• [Presentation] Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification (2009)
  • Author(s): E.M.Umali, K.Kawazoe, Y.Toyama, Y.Yamao
  • Organizer: IEEE VTC2009-Spring
  • Place of Presentation: Barcelona, Spain
• [Presentation] Noise Characteristics of OFDM Signal Generated by EPWM Transmitter with Clipping and Filtering (2009)
  • Author(s): K.Kawazoe, E.M.Umali, Y.Yamao
  • Organizer: TriSAI 2009
  • Place of Presentation: 電気通信大学 (東京)
• [Presentation] Clipping & Filtering を用いたOFDM信号のEPWM送信雑音特性 (2009)
  • Author(s): 川添浩司, E.M.Umali, 山尾泰
  • Organizer: 電子情報通信学会 研究技術報告 RCS2009-130
  • Place of Presentation: ATR (奈良)
• [Presentation] 零点を有する2次のΔ-Σ変調器を用いたEPWM送信機のOFDM信号送信時の雑音特性 (2008)
  • Author(s): 川添浩司、外山義和、Edwin M.UMALI、山尾泰
  • Organizer: 電子情報通信学会無線通信システム研究会
  • Place of Presentation: 東京
  • Year and Date: 2008-12-18
• [Presentation] Generation of OFDM Signal with Envelope Pulse-Width Modulation (EPWM) Transmitter employing 2nd-order Delta-Sigma Modulator (2008)
  • Author(s): K.Kawazoe, Y.Toyama, E.M.Umali, Y.Yamao
  • Organizer: IEEE APWCS2008
  • Place of Presentation: Sendai,査読有
  • Year and Date: 2008-08-22
• [Presentation] 包絡線パルス幅変調(EPWM)送信法によるOFDM 信号の発生 (2008)
  • Author(s): 川添浩司、外山義和、エドウィンウマリ、山尾泰
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 北九州
  • Year and Date: 2008-03-21
• [Presentation] 包絡線パルス幅変調(EPWM)送信法によるOFDM信号の発生 (2008)
  • Author(s): 川添浩司, 外山義和, E. M. Umali, 山尾泰
  • Organizer: 電子情報通信学会 2008年総合全国大会
  • Place of Presentation: 北九州
  • Year and Date: 2008-03-21
• [Presentation] Power Spectral Analysis of the Envelope Pulse-Widt Modulation (EPWM) Transmitter for High Efficiency Amplification of OFDM Signals. (2008)
  • Author(s): E.M.Umali, Y.Toyama, Y.Yamao
  • Organizer: IEEE VTC2008-Spring
  • Place of Presentation: Singapore,査読有
  • Year and Date: 2008-03-13
• [Presentation] OFDM信号に対するDoherty,拡張DohertyおよびEPWM送信機の電力効率 (2008)
  • Author(s): 外山義和, E. M. Umali, 山尾泰
  • Organizer: 電子情報通信学会 無線通信システム研究会
  • Place of Presentation: 広島
  • Year and Date: 2008-01-25
• [Presentation] Generation of OFDM Signal with Envelope Pulse-Width Modulation (EPWM) Transmitter employing 2nd-order Delta-Sigma Modulator (2008)
  • Author(s): K. Kawazoe, Y. Toyama, E. M. Umali, Y. Yamao
  • Organizer: IEEE APWCS2008
  • Place of Presentation: Sendai
• [Presentation] Power Spectral Analysis of the Envelope Pulse-Width Modulation (EPWM) Transmitter for High Efficiency Amplification of OFDM Signals (2008)
  • Author(s): E. M. Umali, Y. Toyama, Y. Yamao
  • Organizer: IEEE VTC2008-Spring
  • Place of Presentation: Singapore
• [Presentation] Power Spectral Analysis of the Envelope Pulse-Width Modulation (EPWM)Transmitter for High Efficiency Amplification of OFDM Signals (2008)
  • Author(s): E. M. UMALI, Y. TOYAMA, Y. YAMAO
  • Organizer: IEEE VTC2008-Spring
  • Place of Presentation: Singapore
• [Presentation] In-Band Noise Analysis and Peak-Clipping Effect on Envelope Pulse-Width Modulation (EPWM) Transmitter (2008)
  • Author(s): E. M. UMALI, K. KAWAZOE, Y. TOYAMA, Y. YAMAO
  • Organizer: 電子情報通信学会 研究技術報告RCS2008-68
  • Place of Presentation: 札幌
• [Presentation] 零点を有する2次の-Δ-Σ変調器を用いたEPWM送信機の雑音特性 (2008)
  • Author(s): 川添浩司, 外山義和, E. M. UMALI, 山尾泰
  • Organizer: 電子情報通信学会 ソサイエテイ大会B-5-38
  • Place of Presentation: 川崎
• [Presentation] 零点を有する2次-Σ変調器を用いたEPWM送信機のOFDM信号送信時の雑音特性 (2008)
  • Author(s): 川添浩司, 外山義和, エドウィン ウマリ, 山尾泰
  • Organizer: 電子情報通信学会 研究技術報告RCS2008-155
  • Place of Presentation: 東京
• [Presentation] Delta-Sigma Envelope Pulse-Width Modulation (EPWM) Transmitter for High Efficiency Linear Amplification (2007)
  • Author(s): E. M. Umali, Y. Toyama and Y. Yamao
  • Organizer: 電子情報通信学会 無線通信システム研究会
  • Place of Presentation: 東京
  • Year and Date: 2007-11-08
• [Presentation] Power Efficiency Analysis for OFDM Signal Amplification with Doherty, Extended Doherty and EPWM Transmitters (2007)
  • Author(s): Y.Yamao, Y.Toyama, E.M.Umali
  • Organizer: ICT Triangle Forum 2007
  • Place of Presentation: Beijing.
  • Year and Date: 2007-09-20
• [Presentation] Power Efficiency Analysis for OFDM Signal Amplification with Doherty, Extended Doherty and EPWM Transmitters (2007)
  • Author(s): Y. Yamao, Y. Toyama, E. M. Umali
  • Organizer: ICT Triangle Forum 2007
  • Place of Presentation: Beijing
• [Remarks]
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• [Remarks]
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• [Remarks]
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