JP2010501144A - 適用される周波数ドメイン拡散によりシンボルベースランダム化された直交周波数分割多重(ofdm)を利用したデータ通信システム及び方法 - Google Patents
適用される周波数ドメイン拡散によりシンボルベースランダム化された直交周波数分割多重(ofdm)を利用したデータ通信システム及び方法 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
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
- H04J13/0048—Walsh
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- Signal Processing (AREA)
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Abstract
Description
Claims (10)
- 固定的又は可変的なシンボルレートに基づき直交周波数分割多重(OFDM)通信信号を構成するため、互いに直交する複数のサブキャリアにデータシンボルを変調及びマッピングする変調・マッピング回路であって、変調回路と、パイロット及びPAPR(Peak−to−Average Power Ratio)キャリアを挿入する回路と、マトリックス演算により各キャリアを逆高速フーリエ変換(IFFT)にマッピングするサブキャリアマッピング回路とを有する変調・マッピング回路と、
傍受及び検出確率を低下させ、周波数毎のパワー(dB/Hz/sec)を低下させ、瞬間的な信号対ノイズ比を維持しながら要求される送信パワーを低下させるためのOFDMシンボルレートにより各サブキャリアを周波数ホッピングするため、暗号化アルゴリズムに基づき前記変調・マッピング回路に対して擬似ランダム信号を生成するよう前記変調・マッピング回路と動作する擬似ランダム信号生成手段と、
周波数ドメイン上に前記複数のサブキャリアを拡散するよう前記変調・マッピング回路に動作接続される周波数ドメイン拡散回路と、
を有するデータ通信装置。 - 前記周波数ドメイン拡散回路は、Walsh変換を適用し、前記周波数ドメイン上に前記複数のサブキャリアを拡散するよう動作するWalsh変換回路を有する、請求項1記載の装置。
- 前記Walsh変換回路は、前記Walsh変換とシンボルの入力ベクトルとを乗算するよう動作する、請求項2記載の装置。
- 前記周波数ドメイン拡散回路から信号を受信するよう設けられる逆高速フーリエ変換(IFFT)回路をさらに有する、請求項1記載の装置。
- 前記擬似ランダム信号生成手段は、連続するOFDMシンボルが同一周波数によりサブキャリアを送信しないように、前記暗号化アルゴリズムに基づき擬似ランダム信号を生成するよう動作する、請求項1記載の装置。
- 固定的又は可変的な直交周波数分割多重(OFDM)シンボルレートに基づきOFDM通信信号を構成するため、互いに直交する複数のサブキャリア上に通信データを分散するステップと、
通信データを変調し、パイロット及びPAPR(Peak−to−Average Power Ratio)キャリアを挿入し、マトリックス演算により各キャリアを逆高速フーリエ変換(IFFT)にマッピングすることによって、傍受及び検出確率を低下させ、周波数毎のパワー(dB/Hz/sec)を低下させ、瞬間的な信号対ノイズ比を維持しながら要求される送信パワーを低下させるためのOFDMシンボルレートにより各サブキャリアを周波数ホッピングするステップと、
周波数ドメイン上に前記複数のサブキャリアを拡散するステップと、
前記周波数ホッピングされたサブキャリアを含む通信信号により前記通信データを送信するステップと、
を有するデータ通信方法。 - 前記周波数ドメイン上に前記複数のサブキャリアを拡散するためWalsh変換を適用するステップをさらに有する、請求項6記載の方法。
- Walsh変換とシンボルの入力ベクトルとを乗算するステップをさらに有する、請求項7記載の方法。
- IFFT前に周波数拡散関数を適用するステップをさらに有する、請求項6記載の方法。
- 連続するOFDMシンボルが同一周波数によりサブキャリアを送信しないように、暗号化アルゴリズムに基づき擬似ランダム信号を生成するステップをさらに有する、請求項6記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/464,854 | 2006-08-16 | ||
US11/464,854 US7649951B2 (en) | 2006-08-16 | 2006-08-16 | System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with applied frequency domain spreading |
PCT/US2007/076072 WO2008022239A1 (en) | 2006-08-16 | 2007-08-16 | System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (ofdm) with applied frequency domain spreading |
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JP2010501144A true JP2010501144A (ja) | 2010-01-14 |
JP5025730B2 JP5025730B2 (ja) | 2012-09-12 |
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JP2009524795A Expired - Fee Related JP5025730B2 (ja) | 2006-08-16 | 2007-08-16 | 適用される周波数ドメイン拡散によりシンボルベースランダム化された直交周波数分割多重(ofdm)を利用したデータ通信システム及び方法 |
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Country | Link |
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US (1) | US7649951B2 (ja) |
EP (1) | EP2064849B1 (ja) |
JP (1) | JP5025730B2 (ja) |
KR (1) | KR101077412B1 (ja) |
CN (1) | CN101518005B (ja) |
CA (1) | CA2660793C (ja) |
TW (1) | TWI363542B (ja) |
WO (1) | WO2008022239A1 (ja) |
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CN101518005B (zh) | 2015-05-27 |
TW200822644A (en) | 2008-05-16 |
KR20090042965A (ko) | 2009-05-04 |
JP5025730B2 (ja) | 2012-09-12 |
CN101518005A (zh) | 2009-08-26 |
WO2008022239A1 (en) | 2008-02-21 |
WO2008022239B1 (en) | 2008-04-03 |
KR101077412B1 (ko) | 2011-10-26 |
US20080043812A1 (en) | 2008-02-21 |
EP2064849A1 (en) | 2009-06-03 |
CA2660793A1 (en) | 2008-02-21 |
US7649951B2 (en) | 2010-01-19 |
EP2064849B1 (en) | 2016-06-22 |
TWI363542B (en) | 2012-05-01 |
CA2660793C (en) | 2013-02-19 |
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