本文選題：Turbo碼 + 編碼器��； 參考：《電子與信息學(xué)報(bào)》2017年09期

【摘要】：針對(duì)目前Turbo碼分量編碼器參數(shù)識(shí)別算法容錯(cuò)性不好、計(jì)算量大的缺點(diǎn),該文提出一種基于校驗(yàn)方程符合度的新算法。首先,根據(jù)碼元約束長(zhǎng)度較小的特點(diǎn),構(gòu)建出編碼器生成多項(xiàng)式數(shù)據(jù)庫(kù),然后通過(guò)遍歷多項(xiàng)式數(shù)據(jù)庫(kù),計(jì)算出每種多項(xiàng)式所對(duì)應(yīng)的平均校驗(yàn)方程符合度值,其最大值所對(duì)應(yīng)的索引號(hào)即為多項(xiàng)式庫(kù)中的正確多項(xiàng)式索引號(hào),從而完成編碼多項(xiàng)式的識(shí)別。該算法僅僅遍歷有限的多項(xiàng)式數(shù)據(jù)庫(kù),其計(jì)算量較小,只與截獲的數(shù)據(jù)量有關(guān);算法采用的數(shù)據(jù)為軟判決信息,故其容錯(cuò)性能較好。仿真結(jié)果表明:在信噪比為0 d B條件下,僅需要截獲10碼塊,交織長(zhǎng)度為100的碼元數(shù)據(jù)量,參數(shù)的識(shí)別率就能達(dá)到90%以上。
[Abstract]:A new algorithm based on the coincidence degree of check equation is proposed to overcome the shortcomings of poor fault-tolerance and large computational load in the parameter identification algorithm of Turbo component encoder. First of all, according to the small constraint length of code element, the encoder generates polynomial database. Then, by traversing the polynomial database, the correspondence value of the average check equation corresponding to each polynomial is calculated. The index number corresponding to the maximum value is the correct polynomial index number in the polynomial library, thus the identification of the coded polynomial is completed. The algorithm only traverses a limited polynomial database, and its computation is small, which is only related to the amount of intercepted data, and the data used in the algorithm is soft decision information, so its fault-tolerant performance is better. The simulation results show that under the condition of 0 dB signal-to-noise ratio (SNR), only 10 code blocks need to be intercepted, and the data amount of 100 symbols with interleaving length is 100. The recognition rate of the parameters can reach more than 90%.
【作者單位】： 海軍航空工程學(xué)院信息融合所;海軍航空工程學(xué)院電子信息工程系;
【基金】：國(guó)家自然科學(xué)基金(91538201) 泰山學(xué)者工程專(zhuān)項(xiàng)經(jīng)費(fèi)(ts201511020)~~
【分類(lèi)號(hào)】：TN911.22

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