主动重发的DS/CDMA ALOHA

摘要

This paper proposes an active repeat scheme for DS/CDMA ALOHAsystems.Systems with infinite and finite active repeat delay are studied respectively,and an interesting conclusion is obtained,i.e.,the performance of a system with infinite active repeat delay can be approached by that of a system with just one slot delay.Numerical and simulation results suggests that the new scheme can effectively improve the performance of DS/CDMA ALOHA systems.%针对DS/CDMAALOHA系统，本文提出了一种主动重发方案，并对主动重发时延为无限和有限值的情况分别进行了分析和研究。研究结果表明，主动重发时延为一个时隙时即可获得接近理想情况的性能。从理论计算和仿真实验的结果可以看到，这种新方案可以有效地改善DS/CDMAALOHA协议的性能。