一类具有稳健无标度特性的LT码及其性能

编码符号的度分布是影响LT码编(译)码性能的关键因素.根据LT码译码过程的消息传递机制，构造一类具有复杂特性的网络结构.利用无标度网络具有平均路径长度最短的特性，提出一种具有稳健无标度特性的LT码.实验结果表明，该编码方案在编(译)码效率、冗余因子、译码成功概率等3方面都优于基于健壮孤子分布的LT码和基于次优度分布的LT码.该编码方案对数据在无线中继网络中的可靠、高效传输具有实用价值.

Robust Scale-Free LT Code and Its Performance

Degree distribution used for generating encoded symbols is the key problem for designing LT code. A complex network was constructed on the basis of the message traveling principle of the decoding process. A robust scale-free LT code was proposed by applying properties of scale-free network, such as shortest average path length. The results indicated that there were better performances in encoding/decoding efficiency, overhead factor, probability of successful decoding of robust scale-free LT code than those of LT codes based on robust soliton distribution and sub-optimal LT code. The validity and efficiency of data transmission in wireless relay networks could be ensured using the proposed method.