Investigating Mother Constellation of SCMA Systems Having Capability of Multiuser Detection

Iswahyudi Hidayat, Linda Meylani, A. Kurniawan, M. S. Arifianto, K. Anwar
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引用次数: 2

Abstract

Codebook design is an important factor determining the performance of sparse code multiple access (SCMA) systems. By properly designing the mother constellation, a codebook will be obtained for each user on the SCMA system. In this paper, we investigate mother constellation for SCMA system having capability of multi user detection $Q$. Two types of constellation are used in this paper, line constellation, where symbols/codebooks owned by each user are distinguished by amplitude, and square constellation, where symbols/codebooks owned by each user are distinguished by phase. Simulation results confirmed that line constellation has better bit error rate (BER) performances compare to square constellation at $L=2$. Higher $L$ in MUD $Q$ needs higher signal to Noise Ratio (BER) to obtain same BER.
具有多用户检测能力的SCMA系统母星座研究
码本设计是决定稀疏码多址(SCMA)系统性能的重要因素。通过合理设计母星座,可以为SCMA系统上的每个用户获得一个码本。本文研究了具有多用户检测能力的SCMA系统的母星座。本文使用了两种星座,一种是线星座,用幅度来区分每个用户拥有的符号/码本;另一种是方星座,用相位来区分每个用户拥有的符号/码本。仿真结果表明,在$L=2$时,线形星座具有较好的误码率性能。在MUD $Q$中,更高的$L$需要更高的信噪比(BER)来获得相同的BER。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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