论文标题
功率失控的SCMA代码簿的设计
Design of Power-Imbalanced SCMA Codebook
论文作者
论文摘要
稀疏代码多重访问（SCMA）是一种有希望的多源通信技术，用于实现未来的大型机器型网络。与假设统一功率分配的现有代码簿设计方案不同，我们提供了一类新颖的SCMA代码簿，它们在不同用户之间显示功率不平衡以进行下行链路传输。基于Star-QAM母星座结构并借助遗传算法，我们优化了拟议的代码簿的最小欧几里得距离（MED）和最小产品距离（MPD）。数值模拟结果表明，我们提出的代码手册可显着提高高斯通道和瑞利褪色通道的错误率性能。
Sparse code multiple access (SCMA) is a promising multiuser communication technique for the enabling of future massive machine-type networks. Unlike existing codebook design schemes assuming uniform power allocation, we present a novel class of SCMA codebooks which display power imbalance among different users for downlink transmission. Based on the Star-QAM mother constellation structure and with the aid of genetic algorithm, we optimize the minimum Euclidean distance (MED) and the minimum product distance (MPD) of the proposed codebooks. Numerical simulation results show that our proposed codebooks lead to significantly improved error rate performances over Gaussian channels and Rayleigh fading channels.
