JP2009527181A - 直交周波数分割多重化システムにおけるダイバーシティ利得を提供する先符号化方法、及びこれを用いる送信装置及び方法 - Google Patents
直交周波数分割多重化システムにおけるダイバーシティ利得を提供する先符号化方法、及びこれを用いる送信装置及び方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 29
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- 238000004891 communication Methods 0.000 description 14
- 239000013256 coordination polymer Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
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- 238000005562 fading Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
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Abstract
【選択図】図3
Description
(2k+1)nπ/M …(1)
ここで、n=0,1,...,(M−1)、k=1,2,...,Mである。
knπ/4 …(2)
ここで、n=0,1、k=1,5である。
110 直列/並列(S/P)変換器
120 先符号化器
130 逆離散フーリエ変換(IDFT)部
140 サイクリックプレフィックス挿入部(CPI)
150 無線周波数(RF)部
200 受信器
210 RF部
220 CP除去部(CPR)
230 離散フーリエ変換(DFT)部
240 等化器
250 並列/直列(P/S)変換器
Claims (14)
- 直交周波数分割多重化(OFDM)システムにおけるダイバーシティ利得を提供する送信装置であって、
入力された送信信号を並列信号に変換する直列/並列変換器と、
所定の周波数オフセットを有する前記並列信号を先符号化する先符号化器と、
前記先符号化された信号の逆離散フーリエ変換(IDFT)を遂行する逆離散フーリエ変換器と、
前記IDFT信号を上方変換し、該上方変換された信号を無線網に出力する無線周波数(RF)部と、を備えることを特徴とする送信装置。 - 前記周波数オフセットは、前記IDFT器のカーネルの基本ベクトルが拡張されないように設定されることを特徴とする請求項1に記載の送信装置。
- 前記基本ベクトルのコンスタレーション上の信号点は、前記周波数オフセットに従って次の式のように表現されることを特徴とする請求項2に記載の送信装置。
(2k+1)nπ/M
ここで、n=0,1,...,(M−1)、k=1,2,...,Mであり、Mは、前記先符号化器のサイズを示す。 - 前記先符号化器のサイズMが2である場合に、前記基本ベクトルのコンスタレーション上の信号点は、次の式のように表現されることを特徴とする請求項3に記載の送信装置。
knπ/4
ここで、n=0,1、k=1,5である。 - 前記送信信号は、直交振幅変調(QAM)信号であることを特徴とする請求項1に記載の送信装置。
- 直交周波数分割多重化(OFDM)システムにおけるダイバーシティ利得を提供する送信方法であって、
入力された送信信号を並列信号に変換するステップと、
所定の周波数オフセットを有する前記並列信号を先符号化するステップと、
前記先符号化された信号の逆離散フーリエ変換(IDFT)を遂行するステップと、
前記IDFT信号を上方変換し、該上方変換された信号を無線網に出力するステップと、を有することを特徴とする送信方法。 - 前記周波数オフセットは、前記IDFTのためのカーネルの基本ベクトルが拡張されないように設定されることを特徴とする請求項8に記載の送信方法。
- 前記基本ベクトルのコンスタレーション上の信号点は、前記周波数オフセットに従って次の式のように表現されることを特徴とする請求項9に記載の送信方法。
(2k+1)nπ/M
ここで、n=0,1,...,(M−1)、k=1,2,...,Mであり、Mは、前記先符号化を遂行するための先符号化器のサイズを示す。 - 前記先符号化器のサイズMが2である場合に、前記基本ベクトルのコンスタレーション上の信号点は、次の式のように表現されることを特徴とする請求項10に記載の送信方法。
knπ/4
ここで、n=0,1、k=1,5である。 - 前記送信信号は、直交振幅変調(QAM)信号であることを特徴とする請求項8に記載の送信方法。
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Application Number | Priority Date | Filing Date | Title |
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US77735606P | 2006-02-28 | 2006-02-28 | |
US60/777,356 | 2006-02-28 | ||
KR10-2006-0049393 | 2006-06-01 | ||
KR1020060049393A KR101260836B1 (ko) | 2006-02-28 | 2006-06-01 | 직교 주파수 분할 다중 시스템에서 다이버시티 이득을 제공하는 선 부호화 방법 및 이를 이용한 송신 장치 및 방법 |
PCT/KR2007/001034 WO2007100216A1 (en) | 2006-02-28 | 2007-02-28 | Pre-coding method for providing diversity gain in orthogonal frequency division multiplexing system and transmission apparatus and method using the pre-coding method |
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JP2009527181A true JP2009527181A (ja) | 2009-07-23 |
JP5206969B2 JP5206969B2 (ja) | 2013-06-12 |
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KR20070113967A (ko) * | 2006-05-26 | 2007-11-29 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기 |
TWI343200B (en) * | 2006-05-26 | 2011-06-01 | Lg Electronics Inc | Method and apparatus for signal generation using phase-shift based pre-coding |
KR20080026010A (ko) * | 2006-09-19 | 2008-03-24 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩을 이용한 데이터 전송 방법 및이를 구현하는 송수신 장치 |
KR20080076683A (ko) * | 2007-02-14 | 2008-08-20 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩 방법 및 이를 지원하는 송수신기 |
KR20090030200A (ko) | 2007-09-19 | 2009-03-24 | 엘지전자 주식회사 | 위상천이 기반의 프리코딩을 이용한 데이터 송수신 방법 및이를 지원하는 송수신기 |
US7965641B2 (en) * | 2008-02-14 | 2011-06-21 | Lingna Holdings Pte., Llc | Robust cooperative spectrum sensing for cognitive radios |
CN102160311B (zh) * | 2008-09-18 | 2015-03-11 | 三菱电机株式会社 | 发送装置以及接收装置 |
CN102204140A (zh) * | 2008-10-31 | 2011-09-28 | 夏普株式会社 | 发送装置、接收装置以及通信系统 |
US8798471B2 (en) * | 2009-10-13 | 2014-08-05 | Xieon Networks S.A.R.L. | Method for processing data in an optical network element and optical network element |
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