Successive Multiuser Detection for Polar Coded SCMA 


Vol. 45,  No. 7, pp. 1137-1144, Jul.  2020
10.7840/kics.2020.45.7.1137


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  Abstract

Sparse code multiple access(SCMA) is a non-orthogonal multiple access(NOMA) scheme which is proposed to increase the transmission capacity of a wireless channel. Recently, SCMA has attracted attention because it achieves a very high spectral efficiency compared to the orthogonal frequency division multiple access(OFDMA) scheme in 4G and 5G communications. On the other hand, the combination of various channel codes and SCMA has been studied to improve the multi-user detection performance of SCMA, and a joint multi-user detection scheme that combines the decoding of channel codes and the multi-user detection process of SCMA has been studied. In this paper, we propose a new joint detection process in which the SCMA detection and the channel code decoding process are segmented by user in the tanner graph of the joint detection process, and the detection is performed sequentially by user. Compared to the conventional joint detector that requires a large number of iterations to obtain the optimal BER performance, the proposed scheme can improve the complexity of the detector by achieving the BER performance convergence with only a small number of iterations.

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  Cite this article

[IEEE Style]

D. Na and K. Choi, "Successive Multiuser Detection for Polar Coded SCMA," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 7, pp. 1137-1144, 2020. DOI: 10.7840/kics.2020.45.7.1137.

[ACM Style]

Dongjun Na and Kwonhue Choi. 2020. Successive Multiuser Detection for Polar Coded SCMA. The Journal of Korean Institute of Communications and Information Sciences, 45, 7, (2020), 1137-1144. DOI: 10.7840/kics.2020.45.7.1137.

[KICS Style]

Dongjun Na and Kwonhue Choi, "Successive Multiuser Detection for Polar Coded SCMA," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 7, pp. 1137-1144, 7. 2020. (https://doi.org/10.7840/kics.2020.45.7.1137)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880