此文件为ＭＰＡ消息传递算法的ｍａｔｌａｂ源文件，在ＳＣＭＡ非正交多址的情况下，具有良好的多用户检测的性能。(This file is the matlab source of the MPA messaging algorithm, and has good multiuser detection performance in the case of SCMA non orthogonal multiple access.)

mpa算法,可以实现四个资源块 ，六个用户之间的迭代用于非正交多址接入(Multi-user detection algorithm for MPA)

SCMA稀疏码分多址接入技术，包括编解码部分(Sparse code division multiple access technology)