Existing finite field network coding (FFNC) can be applied in networks where all users have the same data rate and can thus use the same modulation type. In most practical scenarios, different users typically have different data rates. With simple changes such as zero-padding and repetition to the data sequences of different users received at relays, it is still possible to employ the existing FFNC scheme, but the network throughput and error performance will be compromised. In this paper, we design a network coding scheme for multiuser multiple-relay networks where users' data rates are different. Specifically, we develop a layered network coding approach that allows the use of the existing FFNC for each layer in a hierarchical structure and derive the corresponding decoding process. The bit error (BER) and computational complexity of the proposed scheme are derived. Because the proposed scheme could fully exploit the additional diversity gain from decoding the codewords in each layer separately, it achieves a better BER performance than the existing FFNC scheme, which is validated in simulation.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Multi-Layer Network Coding for Multiuser Relay Networks with Non-Uniform-Rate Users


    Contributors:
    Peng, Chunling (author) / Li, Fangwei (author) / Liu, Huaping (author)


    Publication date :

    2016-09-01


    Size :

    286356 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English






    Asymptotic coding gains in Multiuser systems

    Zhang,X. / Brady,D. / Aware,US et al. | Automotive engineering | 1995


    Rate Optimization with Distributed Network Coordination of Multiuser MIMO Communications

    Erpek, Tugba / Sagduyu, Yalin E. / Shi, Yi et al. | IEEE | 2018