论文标题
QoS的SCMA光谱和能源效率
SCMA Spectral and Energy Efficiency with QoS
论文作者
论文摘要
稀疏代码多重访问（SCMA）是新无线电访问接口的有前途的候选人之一。新一代通信系统有望支持高容量的大量用户访问。但是，实现最佳性能的问题和障碍有许多问题和障碍，例如多源干扰和高功耗。在本文中，我们提出了优化方法，以提高SCMA的光谱和能源效率，并具有个人利率要求。提出的方法已根据电源分配和代码簿分配显示了更好的网络映射矩阵。此外，将所提出的方法与正交频率偏差多访问（OFDMA）和代码偏差多访问（CDMA）分别在光谱效率（SE）和能源效率（EE）方面进行了比较。仿真结果表明，在SE和EE中，SCMA的性能优于OFDMA和CDMA。
Sparse Code Multiple Access (SCMA) is one of the promising candidates for new radio access interface. The new generation communication system is expected to support massive user access with high capacity. However, there are numerous problems and barriers to achieve optimal performance, e.g., the multiuser interference and high power consumption. In this paper, we present optimization methods to enhance the spectral and energy efficiency for SCMA with individual rate requirements. The proposed method has shown a better network mapping matrix based on power allocation and codebook assignment. Moreover, the proposed method is compared with orthogonal frequency devision multiple access (OFDMA) and code devision multiple access (CDMA) in terms of spectral efficiency (SE) and energy efficiency (EE) respectively. Simulation results show that SCMA performs better than OFDMA and CDMA both in SE and EE.
