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A capacity-based codebook design method for sparse code multiple access systems
Zhang S.2; Xiao K.2; Xiao B.2; Chen Z.2; Xia B.2; Chen D.1; Ma S.3
Conference Name8th International Conference on Wireless Communications & Signal Processing (WCSP)
Source Publication2016 8th International Conference on Wireless Communications and Signal Processing, WCSP 2016
Conference DateOCT 13-15, 2016
Conference PlaceYangzhou, PEOPLES R CHINA

Sparse code multiple access (SCMA) is a novel non-orthogonal multiple access scheme, which exploits a multidimensional constellation based on the non-orthogonal spreading technique. The SCMA multi-user codebook design is the bottleneck of system performance and there is no design guideline from the perspective of capacity. In this paper, a novel SCMA codebook design scheme is proposed to maximize the sum rate, where we transfer the design of multi-dimensional constellation sets to the optimizing of series of 1-dimensional complex codewords. Specifically, a basic M-order pulse-amplitude modulation (PAM) is optimized and then the angles of rotation between the input 1-dimensional constellation and the basic M-PAM constellation can be obtained within a feasible calculation complexity to improve the sum-rate. Finally, the series of 1-dimensional complex codewords are combined to construct multi-dimensional codebooks based on Latin square criterion. Numerical results illustrate that the proposed codebook outperforms the existing codebook by 1.3 dB over AWGN channel and 1.1 dB over Rayleigh channel in terms of bit error rate (BER) performance.

URLView the original
Indexed BySCI
WOS Research AreaEngineering ; Telecommunications
WOS SubjectEngineering, Electrical & Electronic ; Telecommunications
WOS IDWOS:000391540800178
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Citation statistics
Document TypeConference paper
Affiliation1.Huawei Technologies Co., Ltd.
2.Shanghai Jiao Tong University
3.Universidade de Macau
Recommended Citation
GB/T 7714
Zhang S.,Xiao K.,Xiao B.,et al. A capacity-based codebook design method for sparse code multiple access systems[C],2016.
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