JP2008523713A - アンテナ間の循環および反転による時空間ブロック符号化mimo−ofdmのピーク対平均電力比の低減方法 - Google Patents
アンテナ間の循環および反転による時空間ブロック符号化mimo−ofdmのピーク対平均電力比の低減方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
-
- 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
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0625—Transmitter arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
-
- 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
- H04L27/2614—Peak power aspects
Abstract
Description
なお、非特許文献1〜5が知られている。
M. Tan,Y. Bar-Ness,"OFDM Peak-to-Average Power Ratio Reduction by Combined Symbol Rotation and Inversion with Limited Complexity",Proc IEEE GLOBECOM,(米国),2003年12月,p.605−610 Yung-Lyul Lee他,"Pea-to-Average Power Ration in MIMO-OFDM Systems using Selective Mapping",IEEE Commun. Lett.,(米国),2003年12月,第7巻,p.575−577 G. Wunder,H. Boche,"Peak Value Estimation of Bandlimited Signals from their Samples, Noise Enhancement, and a Local Characterization in the Neighborhood of an Extremum",IEEE Trans. On Signal Processing,(米国),2003年3月,p.771−780 K. F. Lee,D. B. Williams,"A Space-Time Coded Transmitter Diversity Technique for Frequency Selective Fading Channels",Proc. IEEE Sensor Array and Multichannel Signal Processing Workshop,(米国),2000年,p.149−152 S. M. Alamouti,"A Simple Transmit Diversity Technique for Wireless Communications",IEEE J. Select Areas Commun.,(米国),1998年10月,第16巻,p.1451−1458
SS−CARI方式において、まず、サブブロック
RS−CARI方式を用いて、まず、
続く結果において、CCDFを得るために105個のランダムなOFDM系列が生成された。2個の送信アンテナおよびQPSK(quadrature phase shift keying)データシンボルを有するNC=128個のサブキャリアを用いる。送信信号は、L=4の係数によってオーバーサンプリングされる。必要とされる置換数はひどく処理能力を消費するので、低減された複雑さの準最適なSS−CARIおよびRS−CARI方式を用いたシミュレーション結果のみ示す。
Claims (5)
- Y個の送信アンテナを有するMIMO−OFDM(多入力多出力−直交周波数分割多重)システムにおけるSTBC(時空間ブロック符号化) MIMO−OFDM信号のピーク対平均電力比(PAPR)の低減のための信号スクランブル方法であって、
各送信アンテナについて前記STBC MIMO−OFDM信号におけるOFDMシンボルの系列を等しい大きさのM個のサブブロックに分割し、元のOFDMシンボルの系列から[2Y]M個の置換された系列の組を生成するために、全ての送信アンテナにわたってサブブロック単位で循環および反転を実行するステップと、
予め決定された基準に基づいて、生成された前記OFDMシンボルの系列の組から、最良のPAPR特性を有する1つを送信のために選択するステップと、
を含む方法。 - 前記予め決定された基準は、各組においてY個の系列の最大PAPRの値を算出し、最小の最大PAPRを有する組を送信のために選択することによって、[2Y]M個の全ての系列の組についての最大値を特定するステップを含む請求項1に記載の方法。
- 送信のための系列の第1組を得るために各アンテナについて第1サブブロックにCARI(アンテナ間の循環および反転)が実行され、かつ前記PAPRは前記第1組における全ての系列について計算され、かつ最小の最大PAPRを有する組が保持され、
全ての送信アンテナにわたって連続した前記サブブロックについて同じ手順が引き続き実行され、それによって置換数が低減され、前記PAPRが徐々に低減され、最終的な結果としての系列が送信のために選択される請求項1に記載の方法。 - 乱数を用いてV×M次元の行列が生成され、Vは置換の総数であり、前記行列の各成分は、[1,2Y]上に一様に分布するランダムな整数であり、かつ前記M個のサブブロックについて実行される2Y個の予め決定された異なる置換演算を表わし、
V個の異なる前記系列の組を生成し、
最小の最大PAPRを有する系列を送信のために選択し、それによって信号をデスクランブルするために必要なサイドインフォメーションが大きく低減される請求項1に記載の方法。 - 送信アンテナ数Yは2である請求項1に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63423604P | 2004-12-08 | 2004-12-08 | |
US11/013,934 US7339884B2 (en) | 2004-12-08 | 2004-12-16 | STBC MIMO-OFDM peak-to-average power ratio reduction by cross-antenna rotation and inversion |
PCT/US2005/000284 WO2006062528A1 (en) | 2004-12-08 | 2005-01-06 | Stbc mimo-ofdm peak-to-average power ratio reduction by cross-antenna rotation and inversion |
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JP2008523713A true JP2008523713A (ja) | 2008-07-03 |
JP4511602B2 JP4511602B2 (ja) | 2010-07-28 |
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JP2007545433A Active JP4511602B2 (ja) | 2004-12-08 | 2005-01-06 | アンテナ間の循環および反転による時空間ブロック符号化mimo−ofdmのピーク対平均電力比の低減方法 |
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US (2) | US7339884B2 (ja) |
EP (1) | EP1829259B1 (ja) |
JP (1) | JP4511602B2 (ja) |
KR (1) | KR100916870B1 (ja) |
CN (1) | CN101073217B (ja) |
WO (1) | WO2006062528A1 (ja) |
Cited By (4)
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JP2008522560A (ja) * | 2004-12-02 | 2008-06-26 | ニュージャージー インスティテュート オブ テクノロジー | Paprの低減のための方法、及び/またはシステム |
JP2011097353A (ja) * | 2009-10-29 | 2011-05-12 | Nippon Hoso Kyokai <Nhk> | Ofdm信号送信装置 |
JP2015073296A (ja) * | 2014-11-19 | 2015-04-16 | 富士通セミコンダクター株式会社 | スプリアス測定装置及びそれを利用した受信装置,通信システム |
KR101603477B1 (ko) * | 2015-06-09 | 2016-03-21 | 연세대학교 원주산학협력단 | 다중안테나 sc-fdma 시스템을 위한 신호검출 방법 및 장치 |
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US8787873B1 (en) | 2011-11-04 | 2014-07-22 | Plusn Llc | System and method for communicating using bandwidth on demand |
MX359006B (es) | 2013-11-26 | 2018-09-12 | Plusn Llc | Sistema y método para agregación de portadoras de radiofrecuencia. |
CN103795674B (zh) * | 2014-01-22 | 2017-02-01 | 浙江师范大学 | 一种降低mimo‑ofdm系统的papr的方法 |
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CN109194603B (zh) * | 2018-11-21 | 2019-06-14 | 济南大学 | 降低mimo-ofdm系统峰均功率比的导向交织方法 |
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JP2008522560A (ja) * | 2004-12-02 | 2008-06-26 | ニュージャージー インスティテュート オブ テクノロジー | Paprの低減のための方法、及び/またはシステム |
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JP2011097353A (ja) * | 2009-10-29 | 2011-05-12 | Nippon Hoso Kyokai <Nhk> | Ofdm信号送信装置 |
JP2015073296A (ja) * | 2014-11-19 | 2015-04-16 | 富士通セミコンダクター株式会社 | スプリアス測定装置及びそれを利用した受信装置,通信システム |
KR101603477B1 (ko) * | 2015-06-09 | 2016-03-21 | 연세대학교 원주산학협력단 | 다중안테나 sc-fdma 시스템을 위한 신호검출 방법 및 장치 |
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EP1829259A4 (en) | 2012-01-11 |
JP4511602B2 (ja) | 2010-07-28 |
EP1829259A1 (en) | 2007-09-05 |
CN101073217A (zh) | 2007-11-14 |
USRE41433E1 (en) | 2010-07-13 |
EP1829259B1 (en) | 2018-09-12 |
US20060120268A1 (en) | 2006-06-08 |
CN101073217B (zh) | 2011-11-16 |
KR20070112366A (ko) | 2007-11-23 |
WO2006062528A1 (en) | 2006-06-15 |
KR100916870B1 (ko) | 2009-09-09 |
US7339884B2 (en) | 2008-03-04 |
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