AWGN信道下基于Kite码的多级编码技术

多级编码（multilevel coding，MLC）技术将编码和调制相结合，在不占用额外带宽且不降低实际数据传输速率的情况下，可有效提高数据传输的可靠性。根据MLC技术分级编码的特性及信道编码定理分析，将无码率码与MLC技术结合，理论上会得到较好的误比特率及吞吐量性能。Kite码作为一种新型的无码率码，兼有喷泉码与低密度奇偶校验码的优势。以MLC技术中各等价信道的容量计算为理论基础，设计了以Kite码为分量码，结合BP（block partitioning）集分割方式与高阶调制的MLC新方法。仿真结果表明，以Kite码作分量码的MLC译码性能明显优于以传统喷泉码作分量码的MLC译码性能。 

Multilevel Coding Technology Based on Kite Code in AWGN Channel

Multilevel coding (MLC) scheme, combining coding and modulation technology, does not take up additional bandwidth resources and does not reduce the effective data transmission rate as well, but it can truly improve the reliability of data transmission. According to the multilevel coding feature of the MLC technology and the channel coding theory, it is evident theoretically that the combination of the rate-less code and the MLC technology would get better performance of bit error rate and throughput. As a new type of rate-less code, Kite code has the advantages of both fountain code and LDPC code. In this paper, a new MLC method was designed based on the calculation of the channel capacity of each equivalent channel, taking Kite code as the component code, combining BP set segmentation and high order modulation mode. Simulation results show that the decoding performance of the MLC technology with Kite code as component code is far better than that of the MLC technology with traditional fountain code as component code.