Optimum power control for successive interference cancellation with imperfect channel estimation

被引：108

作者：

Andrews, JG ^{[1
]}

Meng, TH ^{[1
]}

机构：

[1] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2003年 / 2卷 / 02期

关键词：

code-division multiple access (CDMA); interference cancellation; multiuser detection (MUD); power control; superorthogonal codes;

D O I：

10.1109/TWC.2003.809123

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Successive interference cancellation, in conjunction with orthogonal convolutional codes, has been shown to approach the Shannon capacity for an additive white Gaussian noise channel (Viterbi: 1990). However, this requires highly accurate estimates for the amplitude and phase of each user's signal. In this paper, we derive an optimal power control strategy specifically designed to maximize the overall capacity under the constraint of a high degree of estimation error. This power control strategy presents a general formula of which other power control algorithms are special cases. Even with estimation error as high as 50%, capacity can be approximately doubled relative to not using interference cancellation. In addition, when properly applied to multicell mobile networks, this power control scheme can reduce the handset transmit power, and therefore other-cell interference, by more than an order of magnitude.

引用

页码：375 / 383

页数：9

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