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An Advanced Criterion of Permutation Set for SCMA

Cheng Yan 1 and Lin Wang 2
1. North China Institute of Computing Technology, Beijing, China
2. Xian Research Institute of Hi-Tech, Xian, China
Abstract—For Sparse Code Multiple Access (SCMA) with the dimension distance-based codebook design, the convergence reliability of some detected layers in their corresponding decision processes was unsatisfactory at the Message Passing Algorithm (MPA) receiver. Driven by this problem, in the dimension distance-based codebook design of SCMA, an advanced criterion of permutation set is proposed to increase the variance of the set of absolute differences between the sums of distances between interfering dimensions of transmitted codewords multiplexed on all resource nodes. Simulation results show that the Bit Error Rate (BER) performance of the proposed criterion outperforms that of traditional criterion under the same spectral efficiency.
Index Terms—Codebook, MPA, SCMA, permutation set

Cite: Cheng Yan and Lin Wang, "An Advanced Criterion of Permutation Set for SCMA," Journal of Communications vol. 15, no. 3, pp. 231-236, March 2020. Doi: 10.12720/jcm.15.3.231-236
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