4 di c , proietti d , telatar i e et al . finite - length analysis of low - density parity - check codes on the binary erasure channel . ieee trans 如果停止距離較小, ldpc碼在迭代譯碼下的錯(cuò)誤概率曲線經(jīng)常會(huì)出現(xiàn)所謂的"地板效應(yīng)error floor 。
Low - density parity - check code ( ldpc codes ) is a kind of asymptotic good codes that can approach shannon ' s capacity with low complexity iterative decoding 基于圖模型的ldpc碼是一種有較低的迭代譯碼復(fù)雜度和接近shannon容量限的漸近好碼。
Although the estimation algorithm is carried out by parity check code , but it is also applicable in general linear block codes to estimate the channel ’ s parameter 本文算法不僅可以利用偶校驗(yàn)碼的碼結(jié)構(gòu)去估計(jì)信道參數(shù),而且對(duì)于一般的線性分組碼也適用。
Checking code in and out , making code changes , and getting online help are just a point and click away , with version history and project structure visible at a glance 檢查出入的代碼、變更代碼及獲得在線幫助只需指向并點(diǎn)擊,即可看見(jiàn)版本歷史和項(xiàng)目結(jié)構(gòu)。
As code gets written by programmers , it is placed in the dev tree . this tree is " basically unstable " . programmers are only allowed to check code into dev 因?yàn)榇a是開(kāi)發(fā)人員編寫(xiě)的,它被放在開(kāi)發(fā)樹(shù)中。這棵樹(shù)是“基本不穩(wěn)定地” 。開(kāi)發(fā)人員只允許簽入代碼到里面。