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

【摘要】：針對目前Turbo碼分量編碼器參數(shù)識別算法容錯性不好、計算量大的缺點,該文提出一種基于校驗方程符合度的新算法。首先,根據(jù)碼元約束長度較小的特點,構(gòu)建出編碼器生成多項式數(shù)據(jù)庫,然后通過遍歷多項式數(shù)據(jù)庫,計算出每種多項式所對應(yīng)的平均校驗方程符合度值,其最大值所對應(yīng)的索引號即為多項式庫中的正確多項式索引號,從而完成編碼多項式的識別。該算法僅僅遍歷有限的多項式數(shù)據(jù)庫,其計算量較小,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,交織長度為100的碼元數(shù)據(jù)量,參數(shù)的識別率就能達(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】：國家自然科學(xué)基金(91538201) 泰山學(xué)者工程專項經(jīng)費(fèi)(ts201511020)~~
【分類號】：TN911.22

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本文編號：2058976