JP6645676B2 - 無線通信システムにおける圧縮された直交周波数分割多重(ofdm)シンボル - Google Patents
無線通信システムにおける圧縮された直交周波数分割多重(ofdm)シンボル Download PDFInfo
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- 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
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- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- 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
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
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- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
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- 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
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- H04L27/2603—Signal structure ensuring backward compatibility with legacy system
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- H—ELECTRICITY
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- 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
- H04L27/2602—Signal structure
- H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences
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Description
本開示は、以下の米国仮特許出願の利益を主張する。 2014年6月11日に申請され、「Compressed OFDM Symbol for Padding」と題された、米国仮特許出願第62/010,787号
2014年7月22日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/027,525号
2014年8月7日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/034,502号
2014年8月26日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/041,858号
2014年9月16日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/051,089号
2014年12月3日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/087,083号
2014年12月19日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/094,825号
2015年4月16日に申請され、「Compressed OFDM Symbol for Padding and Preamble−v6」と題された、米国仮特許出願第62/148,456号
2015年5月29日に申請され、「Compressed OFDM Symbol for Padding and Preamble」と題された、米国仮特許出願第62/168,652号
Claims (16)
- 通信チャネルを介した送信のための物理層データユニット(PHYデータユニット)を生成する方法であって、
前記PHYデータユニットのデータ部分の1又は複数のOFDMシンボルに含まれることになる複数の情報ビットを受信する段階と、
前記1又は複数のOFDMシンボルの最終OFDMシンボルに含められることになる、前記複数の情報ビットの過剰な情報ビットの数を決定する段階と、
過剰な情報ビットの決定された前記数に基づいて、前記最終OFDMシンボル内の境界の境界値を選択する段階と、
1または複数の第1パディングビットを前記複数の情報ビットに追加することで、前記複数の情報ビットが符号化後、前記最終OFDMシンボルの第1部分まで、前記1または複数のOFDMシンボルを満たすようにする段階であって、前記最終OFDMシンボルの前記第1部分が前記最終OFDMシンボル内で前記境界までの前記最終OFDMシンボルの初期部分である、段階と、
前記複数の情報ビットおよび前記複数の第1パディングビットを符号化して複数の符号化ビットを生成する段階と、
(i)前記最終OFDMシンボルに対応する前記複数の符号化ビットに、1又は複数の第2パディングビットを追加する段階、または、(ii)前記最終OFDMシンボルに対応する前記複数の符号化ビットに基づいて生成される複数のコンスタレーションポイントのセットに、1又は複数のパディングコンスタレーションポイントを追加する段階のうち1つを実行することで、前記1又は複数の第2パディングビット、または、前記1又は複数のパディングコンスタレーションポイントが前記最終OFDMシンボルの第2部分を占有するようにする段階であって、前記第2部分は、前記境界の後の前記最終OFDMシンボルの残りの部分である、段階と、
前記1または複数のOFDMシンボルを生成する段階であって、(i)前記最終OFDMシンボルに対応する符号化された前記複数の情報ビットと、(ii)前記最終OFDMシンボルの前記第1部分内の符号化された前記複数の第1パディングビットと、(iii)前記最終OFDMシンボルの前記第2部分内の前記1又は複数の第2パディングビットまたは前記1又は複数のパディングコンスタレーションポイントとを含めるように前記最終OFDMシンボルを生成する段階と、
少なくとも前記1または複数のOFDMシンボルを含めるように前記PHYデータユニットを生成する段階と
を有する方法。 - 前記最終OFDMシンボルは、第1サイズの逆デジタルフーリエ変換(IDFT)に対応するロングOFDMシンボルであり、前記境界値を選択する段階は、仮想ショートOFDMシンボル内のデータビット数の整数倍のセットから前記値を選択する段階であって、前記仮想ショートOFDMシンボルは、前記第1サイズの分数である第2サイズの逆デジタルフーリエ変換(IDFT)に対応する、段階を含む、請求項1に記載の方法。
- 前記PHYデータユニットを生成する段階は更に、選択された前記境界値が閾値を超える場合に前記データ部分の後に信号拡張フィールドを含める段階であって、前記信号拡張フィールドの期間は選択された前記境界値に基づいて決定される、段階を含む、請求項1に記載の方法。
- 前記PHYデータユニットのプリアンブルに含まれることになる信号フィールドを生成する段階であって、前記信号フィールドは、選択された前記境界値のインジケーションを含む、段階と、
前記信号フィールドを含めるように前記PHYデータユニットの前記プリアンブルを生成する段階と、
前記プリアンブルを更に含めるように前記PHYデータユニットを生成する段階と
を更に有する、請求項3に記載の方法。 - 前記信号フィールドを生成する段階は、拡張信号フィールドが前記PHYデータユニット内に含まれているかどうか示すためのインジケーションを更に含むように前記信号フィールドを生成する段階を含む、請求項4に記載の方法。
- 前記複数の情報ビットおよび前記複数の第1パディングビットを符号化して複数の符号化ビットを生成する段階は、1または複数のバイナリ畳み込み符号(BCC)エンコーダを使用して前記複数の情報ビットおよび前記複数の第1パディングビットを符号化する段階を含む、請求項1に記載の方法。
- 前記複数の情報ビットおよび前記複数の第1パディングビットを符号化して、複数の符号化ビットを生成する段階は、1または複数の低密度パリティチェック(LDPC)エンコーダを使用して前記複数の情報ビット、および、前記複数の第1パディングビットを符号化する段階を含む、請求項1または6に記載の方法。
- 前記複数の符号化ビットに、前記1又は複数の第2パディングビットを追加する段階は、Y個の最終符号化ビットを反復する段階を含み、Yはゼロより大きな正の整数である、請求項1、6または7に記載の方法。
- 物理層データユニット(PHYデータユニット)のデータ部分の1又は複数のOFDMシンボルに含められることになる複数の情報ビットを受信する段階と、
前記1又は複数のOFDMシンボルの最終OFDMシンボル内に含まれることになる、複数の情報ビットの過剰な情報ビットの数を決定する段階と、
前記過剰な情報ビットの決定された数に基づいて前記最終OFDMシンボル内の境界の境界値を選択する段階と、
1または複数の第1パディングビットを前記複数の情報ビットに追加することで、前記複数の情報ビットが、符号化された後で、前記最終OFDMシンボルの第1部分まで前記1または複数のOFDMシンボルを満たすようにする段階であって、前記最終OFDMシンボルの前記第1部分は、前記最終OFDMシンボル内の前記境界までの、前記最終OFDMシンボルの初期部分である、段階と、
前記複数の情報ビットおよび前記複数の第1パディングビットを符号化することで複数の符号化ビットを生成する段階と、
(i)前記最終OFDMシンボルに対応する前記複数の符号化ビットに、1又は複数の第2パディングビットを追加する段階、または、(ii)前記最終OFDMシンボルに対応する前記複数の符号化ビットに基づいて生成される複数のコンスタレーションポイントのセットに、1又は複数のパディングコンスタレーションポイントを追加する段階のうち1つを実行することで、前記1又は複数の第2パディングビットまたは、前記1又は複数のパディングコンスタレーションポイントが前記最終OFDMシンボルの第2部分を占有するようにする段階であって、前記第2部分は、前記境界の後の、前記最終OFDMシンボルの残りの部分である、段階と、
前記1または複数のOFDMシンボルを生成する段階であって、(i)前記最終OFDMシンボルに対応する、符号化された前記複数の情報ビットと、(ii)前記最終OFDMシンボルの前記第1部分内の符号化された前記複数の第1パディングビットと、(iii)前記最終OFDMシンボルの前記第2部分内の前記1又は複数の第2パディングビット、または前記1又は複数のパディングコンスタレーションポイントとを含むように前記最終OFDMシンボルを生成する段階を含む、段階と、
少なくとも前記1または複数のOFDMシンボルを含むように前記PHYデータユニットを生成する段階と
を実行する1または複数の集積回路を有するネットワークインタフェースデバイスを備える装置。 - 前記最終OFDMシンボルは、第1サイズの逆デジタルフーリエ変換(IDFT)に対応するロングOFDMシンボルであり、前記1または複数の集積回路は、仮想ショートOFDMシンボル内のデータビットの数の整数倍のセットから前記境界値を選択し、前記仮想ショートOFDMシンボルは、前記第1サイズの分数である第2サイズの逆デジタルフーリエ変換(IDFT)に対応する、請求項9に記載の装置。
- 前記1または複数の集積回路は、選択された前記境界値が閾値を超える場合、前記データ部分の後に信号拡張フィールドを更に含めるべく、前記PHYデータユニットを生成し、前記信号拡張フィールドの期間は選択された前記境界値に基づいて決定される、請求項9に記載の装置。
- 前記1または複数の集積回路が更に、
前記PHYデータユニットのプリアンブルに含まれることになる信号フィールドを生成する段階であって、前記信号フィールドは、選択された前記境界値のインジケーションを含む、段階と、
前記信号フィールドを含めるように前記PHYデータユニットの前記プリアンブルを生成する段階と、
前記プリアンブルを更に含めるように前記PHYデータユニットを生成する段階と
を実行する、請求項11に記載の装置。 - 前記1または複数の集積回路が更に、拡張信号フィールドが前記PHYデータユニット内に含まれているかどうか示すインジケーションを更に含めるべく前記信号フィールドを生成する、請求項11または12に記載の装置。
- 前記1または複数の集積回路が、1または複数のバイナリ畳み込み符号(BCC)エンコーダを使用して前記複数の情報ビットおよび前記複数の第1パディングビットを符号化する、請求項9に記載の装置。
- 前記1または複数の集積回路が、1または複数の低密度パリティチェック(LDPC)エンコーダを使用して前記複数の情報ビットおよび前記複数の第1パディングビットを符号化する、請求項9または14に記載の装置。
- 前記最終OFDMシンボルに対応する前記複数の符号化ビットに、前記1又は複数の第2パディングビットを追加する段階は、ゼロより大きな正の整数であるY個の最終符号化ビットを反復することを含む請求項9、14または15に記載の装置。
Applications Claiming Priority (19)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201462010787P | 2014-06-11 | 2014-06-11 | |
US62/010,787 | 2014-06-11 | ||
US201462027525P | 2014-07-22 | 2014-07-22 | |
US62/027,525 | 2014-07-22 | ||
US201462034502P | 2014-08-07 | 2014-08-07 | |
US62/034,502 | 2014-08-07 | ||
US201462041858P | 2014-08-26 | 2014-08-26 | |
US62/041,858 | 2014-08-26 | ||
US201462051089P | 2014-09-16 | 2014-09-16 | |
US62/051,089 | 2014-09-16 | ||
US201462087083P | 2014-12-03 | 2014-12-03 | |
US62/087,083 | 2014-12-03 | ||
US201462094825P | 2014-12-19 | 2014-12-19 | |
US62/094,825 | 2014-12-19 | ||
US201562148456P | 2015-04-16 | 2015-04-16 | |
US62/148,456 | 2015-04-16 | ||
US201562168652P | 2015-05-29 | 2015-05-29 | |
US62/168,652 | 2015-05-29 | ||
PCT/US2015/035401 WO2015191901A1 (en) | 2014-06-11 | 2015-06-11 | Compressed ofdm symbols in a wireless communication system |
Publications (2)
Publication Number | Publication Date |
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JP2017523660A JP2017523660A (ja) | 2017-08-17 |
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US20200145268A1 (en) | 2020-05-07 |
US10958492B2 (en) | 2021-03-23 |
CN106716945A (zh) | 2017-05-24 |
JP2017523660A (ja) | 2017-08-17 |
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CN106664281A (zh) | 2017-05-10 |
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US20180248727A1 (en) | 2018-08-30 |
EP3155778A1 (en) | 2017-04-19 |
US9768996B2 (en) | 2017-09-19 |
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