JP4914497B2 - 多入力多出力(mimo)システムにおいてデータを送信する方法およびシステム - Google Patents
多入力多出力(mimo)システムにおいてデータを送信する方法およびシステム Download PDFInfo
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- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
- H03M13/1105—Decoding
- H03M13/1131—Scheduling of bit node or check node processing
- H03M13/114—Shuffled, staggered, layered or turbo decoding schedules
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- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
- H03M13/1148—Structural properties of the code parity-check or generator matrix
- H03M13/116—Quasi-cyclic LDPC [QC-LDPC] codes, i.e. the parity-check matrix being composed of permutation or circulant sub-matrices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
- H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
- H03M13/1148—Structural properties of the code parity-check or generator matrix
- H03M13/118—Parity check matrix structured for simplifying encoding, e.g. by having a triangular or an approximate triangular structure
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
- H03M13/356—Unequal error protection [UEP]
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/007—Unequal error protection
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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
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- Error Detection And Correction (AREA)
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- Detection And Prevention Of Errors In Transmission (AREA)
Description
Claims (10)
- 多入力多出力(MIMO)システムにおいてデータを送信する方法であって、
複数の入力データストリームを受け取るステップと、
前記入力データストリームの低密度パリティ検査(LDPC)符号化をパリティ検査行列を使用して実行するステップであって、前記パリティ検査行列が、前記入力データストリームのうちの対応するストリームそれぞれを符号化するための複数のパリティ検査部分行列を備えている、前記ステップと、
LDPC符号化された前記入力データストリームを複数のアンテナを通じて送信するため時空間符号化を実行するステップと、を含んでおり、
前記入力データストリームの前記LDPC符号化を実行する前記ステップが、1つまたは複数の接続行列を生成するステップ、を含んでおり、接続行列のそれぞれが、前記入力データストリームのうちの1つのデータストリームの情報を、前記入力データストリームのうちの別の1つのデータストリームの符号化に注入するものであり、
前記入力データストリームのうちの前記1つのデータストリームのための前記パリティ検査部分行列に基づく最低のパリティ検査保護レベルが、前記1つの入力データストリームの、割り当てられているパリティ検査保護レベルに等しい、またはそれより低い場合、前記接続行列のそれぞれがゼロ行列であり、そうでない場合、前記接続行列のそれぞれが、ゼロ行列ではない行列であり、
接続行列それぞれについて、前記割り当てられているパリティ検査保護レベルが、前記最低のパリティ検査保護レベルよりもkレベルだけ高い場合、前記接続行列それぞれが、行列C (k) を構築するステップであって、m=r i であり、l=n i であり、r i が、前記入力データストリームのうちの前記1つのデータストリームのパリティ検査ビットの数であり、n i が、前記入力データストリームのうちの前記1つのデータストリームの符号語長であり、I m (t) が、単位行列I m をt列だけ左シフトする演算である、前記ステップと、
C ’ i,j =C 1 +C 2 +…+C k と表すステップと、
C ’ i,j を(i−1)行だけ下にシフトして前記接続行列のそれぞれを得るステップと、を使用して生成される、
方法。 - 前記複数の入力データストリームが、M個の異なるクラスのM個の入力ストリームを備えており、前記パリティ検査行列がM個のレイヤを有し、前記パリティ検査行列の各レイヤが、前記M個のクラスの1つに対応している、
請求項1に記載の方法。 - 接続行列のそれぞれが、前記M個のレイヤのうちの2つのレイヤを、前記2つのレイヤの間の相関情報が前記LDPC符号化時に注入されるように連結する、
請求項1または2に記載の方法。 - 前記パリティ検査行列がブロック単位での下三角行列であり、前記パリティ検査部分行列が、前記パリティ検査行列の主対角線に沿ったブロックとして配置されている、
請求項1から3のいずれかに記載の方法。 - 前記接続行列が、前記パリティ検査行列の前記主対角線より下のブロックとして配置されており、前記主対角線より上のブロックがゼロ行列である、
請求項4に記載の方法。 - 多入力多出力(MIMO)システムにおける送信器であって、
複数の入力データストリームを受け取る1つまたは複数の入力ユニットと、
低密度パリティ検査(LDPC)符号器と、
空間マッピングユニットと、を備えており、
前記LDPC符号器が、前記入力データストリームのLDPC符号化をパリティ検査行列を使用して実行し、前記パリティ検査行列が、前記入力データストリームのうちの対応するストリームそれぞれを符号化するための複数のパリティ検査部分行列を備えており、前記空間マッピングユニットが、LDPC符号化された前記入力データストリームを複数のアンテナを通じて送信するため時空間符号化を実行し、
前記入力データストリームの前記LDPC符号化を実行する目的で、前記LDPC符号器が1つまたは複数の接続行列を生成し、接続行列のそれぞれが、前記入力データストリームのうちの1つのデータストリームの情報を、前記入力データストリームのうちの別の1つのデータストリームの符号化に注入するものであり、
前記入力データストリームのうちの前記1つのデータストリームのための前記パリティ検査部分行列に基づく最低のパリティ検査保護レベルが、前記1つの入力データストリームの、割り当てられているパリティ検査保護レベルに等しい、またはそれより低い場合、前記接続行列のそれぞれがゼロ行列であり、そうでない場合、前記接続行列のそれぞれが、ゼロ行列ではない行列であり、
接続行列それぞれについて、前記割り当てられているパリティ検査保護レベルが、前記最低のパリティ検査保護レベルよりもkレベルだけ高く割り当てられている場合、前記接続行列それぞれが、行列C (k) を構築するステップであって、m=r i であり、l=n i であり、r i が、前記入力データストリームのうちの前記1つのデータストリームのパリティ検査ビットの数であり、n i が、前記入力データストリームのうちの前記1つのデータストリームの符号語長であり、I m (t) が、単位行列I m をt列だけ左シフトする演算である、前記ステップと、
C ’ i,j =C 1 +C 2 +…+C k と表すステップと、
C ’ i,j を(i−1)行だけ下にシフトして前記接続行列のそれぞれを得るステップと、を使用して、生成される、
送信器。 - 前記複数の入力データストリームが、M個の異なるクラスのM個の入力ストリームを備えており、前記パリティ検査行列がM個のレイヤを有し、前記パリティ検査行列の各レイヤが、前記M個のクラスの1つに対応している、
請求項6に記載の送信器。 - 接続行列のそれぞれが、前記M個のレイヤのうちの2つのレイヤを、前記2つのレイヤの間の相関情報が前記LDPC符号化時に含まれるように連結する、
請求項6または7に記載の送信器。 - 前記パリティ検査行列がブロック単位での下三角行列であり、前記パリティ検査部分行列が、前記パリティ検査行列の主対角線に沿ったブロックとして配置されている、
請求項6から8のいずれかに記載の送信器。 - 前記接続行列が、前記パリティ検査行列の前記主対角線より下のブロックとして配置されており、前記主対角線より上のブロックがゼロ行列である、
請求項9に記載の送信器。
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PCT/SG2006/000306 WO2008045001A1 (en) | 2006-10-18 | 2006-10-18 | A method and system for data transmission in a multiple input multiple output (mimo) system |
SGPCT/SG2006/000306 | 2006-10-18 | ||
PCT/SG2007/000332 WO2008048188A1 (en) | 2006-10-18 | 2007-10-01 | A method and system for data transmission in a multiple input multiple output (mimo) system |
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JP2010507326A JP2010507326A (ja) | 2010-03-04 |
JP4914497B2 true JP4914497B2 (ja) | 2012-04-11 |
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JP2009533284A Expired - Fee Related JP4914497B2 (ja) | 2006-10-18 | 2007-10-01 | 多入力多出力(mimo)システムにおいてデータを送信する方法およびシステム |
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