CDMA2000 1x EV-DV中具有功率控制的H-ARQ

在CDMA2000 1x EV DV中新应用的混合自动重传请求(Hybrid Automatic Repeat Request,H ARQ)技术在本质上与快速功率控制非常相似,二者都用于减小对其他用户的干扰。为了平衡H ARQ增益和分组时延,H ARQ定义了4种操作模式:正常模式(normal mode)、简约模式(reduction mode)、增强模式(boost mode)和增强简约模式(boost re-duction mode)。4种模式的定义是根据H ARQ操作中信道增益的设置方式来定义的。仿真的结果表明简约模式在分组差错率(Packet Error Rate,PER)和分组时延两个方面都有较好的性能。增强模式比非增强模式有更低的PER和分组时延,但是其代价是需要更多的能量。

H-ARQ with Power Controlled in CDMA2000 1x EV-DV System

The newly applied HARQ technique in the reverse link of a CDMA2000 1xEVDV system has shown to be similar in nature with the fast power control technique,the two techniques are used to reduce interference for other users.In order to balance the HARQ gain and packet delay time,four modes of operation are defined:normal,reduction,boost,and boost reduction.The four modes are defined according to the way of the channel gain is set for the HARQ operation.Simulation results show that the reduction modes have better performance in terms of both PER and packet delay time.It is also shown that the boost modes have lower PER and packet delay time than the nonboost modes,but at the expense of more energy.