翻訳と辞書 Words near each other ・ Repinique ・ Repino ・ Repeat after me song ・ Repeat Dive ・ Repeat loop ・ Repeat Offender ・ Repeat Offender (Richard Marx album) ・ Repeat Performance ・ Repeat Performance (album) ・ Repeat Records ・ Repeat sign ・ Repeat unit ・ Repeat When Necessary ・ Repeat winners of horse races ・ Repeat – The Best of Jethro Tull – Vol II ・ Repeat-accumulate code ・ Repeat-player effect ・ Repeatability ・ Repeatable Battery for the Assessment of Neuropsychological Status ・ Repeated Absences ・ Repeated game ・ Repeated measures design ・ Repeated Offender ・ Repeated sequence (DNA) ・ Repeater ・ Repeater (album) ・ Repeater (band) ・ Repeater (disambiguation) ・ Repeater (horology) ・ Repeater Glacier Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Repeat-accumulate code ： ウィキペディア英語版 Repeat-accumulate code In computer science, repeat-accumulate codes (RA codes) are a low complexity class of error-correcting codes. They were devised so that their ensemble weight distributions are easy to derive. RA codes were introduced by Divsalar ''et al.'' In an RA code, an information block of length $$ is repeated $$ times, scrambled by an interleaver of size $$, and then encoded by a rate 1 accumulator. The accumulator can be viewed as a truncated rate 1 recursive convolutional encoder with transfer function $$, but Divsalar ''et al.'' prefer to think of it as a block code whose input block $$ and output block $$ are related by the formula $$ and $x\_i\; =\; x\_+z\_i$ for $i\; >\; 1$. The encoding time for RA codes is linear and their rate is $1/q$. They are nonsystematic. ==Irregular Repeat Accumulate Codes== Irregular Repeat Accumulate (IRA) Codes are a derivative form of repeat accumulate (RA) codes where the repetition performed on the input bits is not equal for all bits.〔Hui Jin, Aamod Khandekar & Robert McEliece, "Irregular Repeat-Accumulate Codes."()〕 For example, some bits may be repeated three (3) times during coding, while other bits may be repeated eight (8) times. Systematic IRA codes are considered a form of LDPC code. Litigation over whether the DVB-S2 LDPC code is a form of IRA code is ongoing.〔Hughes Satellite Codes Spark Caltech Patent Suit.()〕 US patents 7,116,710; 7,421,032; 7,916,781; and 8,284,833 are at issue. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Repeat-accumulate code」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.