BCH-LT级联码的分析与设计

Analysis and Design of BCH-LT Concatenated Codes

通过把无码率LT码和BCH码进行级联,构造了一类性能优异的级联码,并且提出了软判决迭代译码算法,应用在内外码的译码过程中,解决了错误平层问题。通过仿真可知,在加性高斯白噪声二进制对称信道中,该级联码在很宽的信噪比下具有较好的性能,可以进行可靠的传输。

In this paper, by concatenating the non-bit-rate LT codes and BCH codes, a set of excellent performance concatena- ted codes is constructed and a soft iterative decoding algorithm is proposed, which are applied in internal and external codes in the decoding process so as to resolve the error floor problems. The simulation shows that, in the additive white noise binary symmetric channel, the concatenated code has better performance, and is reliable in transmission.