Optimal Step-Size Mechanism for Stochastic Gradient Algorithm Applied to CDMA Receiver in Multipath Fading Channels

被引：0

作者：

Ueng, Fang-Biau ^{[1
]}

Chang, Jui-Chi ^{[1
]}

Wang, Hsuan-Fu ^{[1
]}

Chen, Ming-Chang ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Elect Engn, Taichung 40227, Taiwan

来源：

2009 IEEE 20TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS | 2009年

关键词：

LMS ALGORITHMS; CONVERGENCE; SYSTEMS;

D O I：

10.1109/PIMRC.2009.5449762

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

This paper investigates the optimal step-size mechanism for a stochastic gradient (SG) based direct sequence (DS-) code division multiple access (CDMA) receiver under the influence of the multiple access interference (MAI) and intersymbol interference (ISI) in multi-path environments by utilizing a simple stochastic model. The convergence of the derived optimal step-size sequence is verified analytically. The learning curve is applied to analyze and compare the speed of convergence and residual mean-squared error (MSE) for the fixed and time-varying step-size sequence methodologies. Simulations show that the receiver utilizes the derived optimal step-size sequence not only has faster convergent speed and smaller MSE, but also is robustly to different multi-path channels.

引用

页码：3133 / 3137

页数：5

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