A generalized design of distributed rateless codes with decreasing ripple size for multiple-access relay networks

作者：Liao, Jianxin; Zhang, Lei^*; Li, Tonghong; Wang, Jingyu; Qi, Qi

来源：Wireless Networks, 2017, 23(7): 2177-2188.

DOI：10.1007/s11276-016-1279-y

• Distributed rateless codes
• Degree distribution
• Heuristic matrixes
• Optimization algorithm

In this correspondence, the problem of existing distributed rateless codes (DRC) with inaccurate degree distributions in the sources and the relay is addressed. Based on a well-known multiple-access relay network model, a generalized design of DRC (GDRC) is proposed by using optimization theory and heuristic Jacobian iterative algorithm, in which the interaction between the degree distributions in the sources and in the relay is considered. Our GDRC can be applied to Luby transfer codes or any other rateless codes that can be described with a degree distribution. Furthermore, a novel approach of designing GDRC with decreasing ripple size is proposed by directly analysing the interaction between the ripple size revolutions in the sources and in the relay. Our proposed scheme is evaluated and compared with existing schemes. It is shown that our proposed scheme exhibits reduced overhead, memory usage, bit error rate and energy consumption compared to the existing schemes.

• 出版日期2017-10
• 单位北京邮电大学