Robust power control of CDMA cellular radio systems with time-varying delays

被引：8

作者：

Yang, Chang-Yi ^{[1
]}

Chen, Bor-Sen ^{[2
]}

机构：

[1] Natl Penghu Univ, Dept Comp Sci & Informat Engn, Penghu 88046, Taiwan

[2] Natl Tsing Hua Univ, Dept Elect Engn, Hsinchu 300, Taiwan

来源：

SIGNAL PROCESSING | 2010年 / 90卷 / 01期

关键词：

DS-CDMA; Power control; Multiple-mode Smith prediction filter; Likelihood function; CORRELATION MODEL;

D O I：

10.1016/j.sigpro.2009.07.016

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：

Power control is an important factor to increase communication link quality and system capacity in the direct-sequence code-division multiple access (DS-CDMA) cellular radio systems. The Smith prediction filter can achieve the unbiased asymptotic tracking about a desired target signal to interference noise ratio (SINR) under the fixed round-trip delay. However, it is sensitive to the variation of round-trip delay. In order to track the desired SINR with the time-varying round-trip delay, a multiple-mode Smith prediction filter, which combines the multiple Smith predictors with a likelihood function, is proposed for the power control of CDMA systems. The proposed scheme can compensate for the unknown time-varying round-trip delay. Simulation results show that the performance of the proposed multiple-mode power control method is robust to time-varying round-trip delay in the CDMA cellular radio systems. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：363 / 372

页数：10

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