JP2009177416A - 復号装置および方法、プログラム、並びに記録媒体 - Google Patents
復号装置および方法、プログラム、並びに記録媒体 Download PDFInfo
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- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
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- H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
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Abstract
【解決手段】LDPC符号における復号を実行するLDPC符号復号装置50に含まれるチェックノード処理演算器54への入力を、LDPC符号復号装置50への入力である受信値が、取りうる値よりも狭い範囲に制限する。この制限により、復号性能を殆ど劣化させることなく、復号において関数fの演算、チェックノード処理演算器54における加算部および関数f-1の演算を簡略化することができる。本発明は、LDPC符号における復号を行う復号装置に適用できる。
【選択図】図5
Description
R. G. Gallager, "Low-Density Parity-Check Codes", IRE Transations on Information Theory, 1962
Hc=0 ・・・(1)
を満たす。式(1)はM個のパリティ検査方程式を表している。
条件1.Qnの硬判定より得られる符号語の推定値をzとするとき、シンドロームHzが0となれば終了
条件2.予め設定されている繰り返し回数に達した時点で終了
y’=y/q−0.5
とすれば、y’は、―M1からM1―1の間の整数値を取ることになる。よって、このように表現し、整数値を用いて処理が行えるように構成することも可能である。
H=[H0 H1 H2 ・・・H135] ・・・(9)
Claims (7)
- 符号化される前の情報語を推定する復号装置において、
前記復号装置の入力として用いる値が取りうる値よりも狭い範囲に、処理する範囲を限定し、その限定された範囲内での値と、その値を所定の関数に代入したときの演算結果を関連付けたルックアップテーブルを参照した演算を行う過程を含む復号を行う
復号装置。 - 前記復号は、LDPC符号化方式に基づく復号である
請求項1に記載の復号装置。 - 前記ルックアップテーブルは、チェックノードから変数ノードへのメッセージを演算するときに参照される
請求項2に記載の復号装置。 - 変数ノードからチェックノードへのメッセージを計算するとき、出力する前記メッセージの範囲を制限する演算を行う
請求項2に記載の復号装置。 - 符号化される前の情報語を推定する復号装置の復号方法において、
前記復号装置の入力として用いる値が取りうる値よりも狭い範囲に、処理する範囲を限定し、その限定された範囲内での値と、その値を所定の関数に代入したときの演算結果を関連付けたルックアップテーブルを参照した演算を行う過程を含む復号を行う
復号方法。 - 符号化される前の情報語を推定する復号装置の復号を制御するコンピュータが読み取り可能なプログラムにおいて、
前記復号装置の入力として用いる値が取りうる値よりも狭い範囲に、処理する範囲を限定し、その限定された範囲内での値と、その値を所定の関数に代入したときの演算結果を関連付けたルックアップテーブルを参照した演算を行う過程を含む復号を行う
プログラム。 - 請求項6に記載のプログラムが記録されている記録媒体。
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JP2008012946A JP4572937B2 (ja) | 2008-01-23 | 2008-01-23 | 復号装置および方法、プログラム、並びに記録媒体 |
US12/346,372 US20090187802A1 (en) | 2008-01-23 | 2008-12-30 | Decoding device and method, program, and recording medium |
EP09000796A EP2083519A3 (en) | 2008-01-23 | 2009-01-21 | Decoding of low density parity check (LDPC) codes using quantized node operations with limited input range |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011182217A (ja) * | 2010-03-02 | 2011-09-15 | Hitachi Kokusai Electric Inc | 送信機、dstbc符号器及びdstbc符号器の符号化方法 |
WO2020170435A1 (ja) * | 2019-02-22 | 2020-08-27 | 三菱電機株式会社 | 誤り訂正復号装置および誤り訂正復号方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012124888A (ja) * | 2010-11-15 | 2012-06-28 | Fujitsu Ltd | 復号装置及び復号方法 |
US20150207523A1 (en) * | 2014-01-21 | 2015-07-23 | Samsung Electronics Co., Ltd. | Low-power dual quantization-domain decoding for ldpc codes |
JP6426272B2 (ja) | 2015-10-13 | 2018-11-21 | 華為技術有限公司Huawei Technologies Co.,Ltd. | 復号デバイスおよび方法、および信号送信システム |
US9806743B2 (en) | 2015-11-16 | 2017-10-31 | Mitsubishi Electric Research Laboratories, Inc. | System and method of belief propagation decoding |
US10548158B2 (en) * | 2016-03-10 | 2020-01-28 | Huawei Technologies Co., Ltd. | Message passing algorithm decoder and methods |
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JP2006304130A (ja) * | 2005-04-25 | 2006-11-02 | Sony Corp | 復号装置および復号方法 |
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US6938196B2 (en) * | 2001-06-15 | 2005-08-30 | Flarion Technologies, Inc. | Node processors for use in parity check decoders |
JP3815557B2 (ja) * | 2002-08-27 | 2006-08-30 | ソニー株式会社 | 符号化装置及び符号化方法、並びに復号装置及び復号方法 |
JP2004088470A (ja) * | 2002-08-27 | 2004-03-18 | Sony Corp | 復号装置及び復号方法 |
US7296216B2 (en) * | 2003-01-23 | 2007-11-13 | Broadcom Corporation | Stopping and/or reducing oscillations in low density parity check (LDPC) decoding |
JP4296949B2 (ja) * | 2004-02-03 | 2009-07-15 | ソニー株式会社 | 復号装置及び方法、並びに情報処理装置及び方法 |
US7475103B2 (en) * | 2005-03-17 | 2009-01-06 | Qualcomm Incorporated | Efficient check node message transform approximation for LDPC decoder |
JP4293172B2 (ja) * | 2005-09-13 | 2009-07-08 | ソニー株式会社 | 復号装置および復号方法 |
US7831887B2 (en) * | 2005-12-15 | 2010-11-09 | General Instrument Corporation | Method and apparatus for using long forward error correcting codes in a content distribution system |
KR20070084952A (ko) * | 2006-02-22 | 2007-08-27 | 삼성전자주식회사 | 통신 시스템에서 신호 수신 장치 및 방법 |
JP2008012946A (ja) | 2006-07-03 | 2008-01-24 | Toyota Motor Corp | 車室材構造 |
US8005141B2 (en) * | 2006-07-19 | 2011-08-23 | International Business Machines Corporation | Method for efficient encoding and decoding quantized sequence in Wyner-Ziv coding of video |
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JP2006304130A (ja) * | 2005-04-25 | 2006-11-02 | Sony Corp | 復号装置および復号方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011182217A (ja) * | 2010-03-02 | 2011-09-15 | Hitachi Kokusai Electric Inc | 送信機、dstbc符号器及びdstbc符号器の符号化方法 |
WO2020170435A1 (ja) * | 2019-02-22 | 2020-08-27 | 三菱電機株式会社 | 誤り訂正復号装置および誤り訂正復号方法 |
US11522562B2 (en) | 2019-02-22 | 2022-12-06 | Mitsubishi Electric Corporation | Error correcting decoding device and error correcting decoding method |
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EP2083519A2 (en) | 2009-07-29 |
US20090187802A1 (en) | 2009-07-23 |
EP2083519A3 (en) | 2012-08-08 |
JP4572937B2 (ja) | 2010-11-04 |
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