基于校驗(yàn)方程符合度下的Turbo碼編碼器盲識別

張立民; 吳昭軍; 鐘兆根

doi:10.11999/JEIT161391

基于校驗(yàn)方程符合度下的Turbo碼編碼器盲識別

doi: 10.11999/JEIT161391

1.
(海軍航空工程學(xué)院信息融合所煙臺 264001) ②(海軍航空工程學(xué)院電子信息工程系煙臺 264001)

基金項(xiàng)目:

國家自然科學(xué)基金(91538201)，泰山學(xué)者工程專項(xiàng)經(jīng)費(fèi)(ts201511020)

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- 文章訪問數(shù): 1441
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出版歷程
- 收稿日期: 2016-12-23
- 修回日期: 2017-03-20
- 刊出日期: 2017-09-19

Blind Recognition of Turbo Code Encoder Based on Conformity of Parity-check Equation

1.
(Institute of Information Fusion, Naval Aeronautical and Astronautical University, Yantai 264001, China)
2.
(Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China)

Funds:

The National Natural Science Foundation of China (91538201), Taishan Scholar Special Foundation (ts201511020)

摘要

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(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，然后通過遍歷多項(xiàng)式數(shù)據(jù)庫，計算出每種多項(xiàng)式所對應(yīng)的平均校驗(yàn)方程符合度值，其最大值所對應(yīng)的索引號即為多項(xiàng)式庫中的正確多項(xiàng)式索引號，從而完成編碼多項(xiàng)式的識別。該算法僅僅遍歷有限的多項(xiàng)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 dB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。
- Turbo碼 /
- 編碼器 /
- 校驗(yàn)方程符合度 /
- 多項(xiàng)式數(shù)據(jù)庫
Abstract: In order to solve the defects of poor error tolerance and large calculation amount in current Turbo-code encoder recognition algorithms, a new algorithm based on conformity of parity-check equation is proposed. Firstly, according to small code constraint length, the coding polynomial database is built, then each polynomial of average conformity of parity-check equation is calculated by traversing the database, as a result, the Turbo-code encoder can be realized, because the correct polynomial can make the conformity maximum. The algorithm has small amount of calculation because of finite traversal, which is only related to amount of intercepted data, besides, this algorithm has good error tolerance by soft decisions. The simulation results show that the correct ratio of recognition can reach 90% at SNR of 0 dB by the 10 intercepted code blocks, and the length of each block is 100.
- Turbo-code /
- Encoder /
- Conformity of parity-check equation /
- Polynomial database

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