CDMA蜂窝网络的反向链路功率控制策略

S. Su, Shinn-Shyue Shieh
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引用次数: 13

摘要

功率控制(PC)是DS-CDMA蜂窝移动无线电系统中的一个重要问题。对于is -95标准,反向链路PC策略基于固定步长功率变化,每次更新只需要一个命令位。我们称这种策略为DM-PC。从数字通信的角度来看,在相同的控制位数下,ADM将比DM具有更好的性能,因此对DM- pc进行改进,使其与IS-95兼容是一个不错的主意。然而,从我们之前的仿真结果来看,纯ADM-PC并不比DM-PC更好。因此,我们提出了另一种PC策略,称为改进型ADM-PC。仿真结果表明,它比DM-PC具有更好的性能。
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Reverse-link power control strategies for CDMA cellular network
Power control (PC) is an important issue in the DS-CDMA cellular mobile radio system. For the IS-95 standard, the reverse-link PC strategy is based on fixed-step power change and it needs only one command bit per update. We call this strategy DM-PC. From the point of view of digital communication, ADM will have better performance with the same number of control bits compared to DM. So it appears to be a good idea to improve the DM-PC and be compatible with the current system as IS-95. However, the pure ADM-PC is not better than DM-PC from our earlier simulation results. Hence, we propose another PC strategy called modified ADM-PC. The simulation results show that it has better performance than DM-PC.
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