非二進(jìn)制Turbo級(jí)聯(lián)碼的性能分析
Performance Analysis of the Concatenated Non-binary Turbo Codes
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摘要: 該文在分析了非二進(jìn)制Turbo碼的譯碼算法的基礎(chǔ)上，提出了非二進(jìn)制Turbo碼和具有良好糾突發(fā)錯(cuò)誤的RS碼級(jí)聯(lián)的非二進(jìn)制Turbo級(jí)聯(lián)碼系統(tǒng)模型。該系統(tǒng)采用縮短的RS碼(204, 188)作為外碼，非二進(jìn)制Turbo碼作為內(nèi)碼的串行級(jí)聯(lián)方式，內(nèi)碼和外碼之間用深度為12的交織器隔開(kāi)，譯碼時(shí), 非二進(jìn)制Turbo碼分別采用Symbol-by-Symbol Log-MAP和SOVA算法。仿真結(jié)果顯示，與二進(jìn)制Turbo級(jí)聯(lián)碼系統(tǒng)相比，該系統(tǒng)具有誤碼率低，延時(shí)時(shí)間短，頻帶利用率高等優(yōu)點(diǎn)。Abstract: A novel system model using a non-binary Turbo concatenated codes is proposed based on analysis about the decoding algorithm of the non-binary Turbo codes in this paper. A shorted RS code(204,188)as outer code and a non-binary Turbo code as a inner code is separated in the system , Symbol-by-Symbol Log-MAP and SOVA algorithm is used in decoding the non-binary Turbo code .The conclusion by simulating is that proposed system has the features of low bit error ratio, low latency and high spectral, etc, compared to the other concatenated codes systems.
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