一种RaptorQ码的模式选择解码算法

A mode selection algorithm for RaptorQ code decoding

针对RaptorQ码解码复杂度高的问题,提出了一种模式选择解码(MSD)算法。该方法结合优化失活解码高斯消元(OIDGE)算法与快速降维解码(DRFD)算法的优点,综合考虑了信道的实际丢包情况与不同解码算法的效率,根据计算所得丢包率,选择合适的解码算法。在嵌入式系统上进行了实验,结果表明,该算法在不同丢包率情况下可以自适应地选择合适的解码算法,提高了RaptorQ码的解码效率。

Aiming at the problem of high complexity of decoding RaptorQ codes, a mode selective decoding algorithm for RaptorQ code is proposed in this paper. Combined with the advantages of optimized inactivation decoding Gaussian elimination（OIDGE） algorithm and dimensionality reduced fast decoding （DRFD） algorithm, the actual situation and the efficiency of the channel decoding algorithm are taken into account, and then the corresponding decoding mode is adopted according to current packet loss rate. Experiments are carried out on embedded system, and the results show that the decoder can select the appropriate algorithm adaptive to the packet loss rate. This improves the decoding efficiency of RaptorQ codes in a certain extent.