使用Java语言编写的无阻赛监听小程序，能保证多个客户端接入实现无阻塞监听-Unimpeded race monitor applet using the Java language, to ensure that multiple clients access to non-blocking listening

稀疏码多址接入，就是应5G需求设计产生的一种非正交多址技术。在发送端通过多维调制和稀疏扩频将编码比特映射成SCMA码字，接收端通过多用户检测完成译码。-Sparse code multiple access is a kind of non orthogonal multiple access technology, which should be produced by the design of 5G demand. The coding bits are mapped into SCMA

Being an effective non-orthogonal multiple access (NOMA) technique, sparse code multiple access (SCMA) is promising for future wireless communication. Compared with orthogonal techniques, SCMA enjoys higher overloading tolerance and lower complexity