Distributed Luby transform coding for three‐source single‐relay networks based on the deconvolution of robust soliton distribution
Hanqin Shao, Dazhuan Xu, Xiaofei Zhang · IET Communications · 2014
The distributed Luby transform (LT) coding is investigated for the multisource networks, especially with three sources. Based on the three‐source single‐relay network model, the authors propose a threefold deconvolution method of the robust soliton distribution (RSD). The deconvolved distribution is used at each source, and a simple and feasible combining algorithm is developed for re‐encoding at the relay. Such a modified LT code with three sources (MLT‐3) is constructed. Simulation results verify that the overall degree distribution of the proposed MLT‐3 codes agrees well with the RSD. The performance of MLT‐3 codes is evaluated and compared with other coding schemes. Simulations reveal that MLT‐3 codes have similar behaviour with the two‐source or four‐source distributed LT codes and the benefits are observed in comparison with the separate LT codes. Simulations also show that MLT‐3 codes exhibit good performance on various erasure channels.