论文标题
使用差分进化的SCMA代码簿设计
Design of SCMA Codebooks Using Differential Evolution
论文作者
论文摘要
非正交多访问（NOMA）是一项有前途的技术，可满足未来无线网络中大量连通性的需求。稀疏代码多访问（SCMA）是一种流行的代码域NOMA技术。 SCMA的有效性来自：（1）基于消息传递算法（MPA）的复杂多用户检测的多维稀疏代码书以及（2）复杂的多用户检测。用户的代码手册在确定SCMA系统性能中起主要作用。本文通过考虑整个系统（包括SCMA编码器和基于MPA的检测器），提出了一个框架来设计代码簿。符号率（SER）被认为是需要最小化的设计标准。差分进化（DE）用于在代码簿上进行SER的最小化。为各种通道模型提供了仿真结果。
Non-orthogonal multiple access (NOMA) is a promising technology which meets the demands of massive connectivity in future wireless networks. Sparse code multiple access (SCMA) is a popular code-domain NOMA technique. The effectiveness of SCMA comes from: (1) the multi-dimensional sparse codebooks offering high shaping gain and (2) sophisticated multi-user detection based on message passing algorithm (MPA). The codebooks of the users play the main role in determining the performance of SCMA system. This paper presents a framework to design the codebooks by taking into account the entire system including the SCMA encoder and the MPA-based detector. The symbol-error rate (SER) is considered as the design criterion which needs to be minimized. Differential evolution (DE) is used to carry out the minimization of the SER over the codebooks. The simulation results are presented for various channel models.
