Channel estimation and interference suppression for uplink CDMA mobile communication systems: Research Articles

Authors:
Zi-Wei Zheng;Zhi-Xing Yang;Yi-Sheng Zhu;Chang-Yong Pan
Affiliations:
State Key Lab on Microwave and Digital Communications, Electronics Engineering Department, Tsinghua University, Beijing 100084, The People's Republic of China;State Key Lab on Microwave and Digital Communications, Electronics Engineering Department, Tsinghua University, Beijing 100084, The People's Republic of China;College of Information Engineering, Dalian Maritime University, Dalian 116026, The People's Republic of China;State Key Lab on Microwave and Digital Communications, Electronics Engineering Department, Tsinghua University, Beijing 100084, The People's Republic of China
Venue:
Wireless Communications & Mobile Computing
Year:
2004

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Neural network-based receiver for uplink multiuser code division multiple access communication system

IDEAL'07 Proceedings of the 8th international conference on Intelligent data engineering and automated learning

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Abstract

Wireless communications for mobile telephone and data transmission is currently undergoing very rapid development. Code division multiple-access (CDMA) implemented with direct sequence spread spectrum signaling is among the most promising multiplexing technologies for cellular telecommunications services. In this paper, jointly period inserted pilot symbols assisted recursive (PIPSAR) channel estimation and interference suppression techniques are proposed for uplink CDMA mobile communication systems. The uplink CDMA mobile communication system model is described in the form of space-time domain through antenna array and multipath expression. Interference suppression is achieved by using adaptive minimum mean squared error (MMSE) digital filters that span several successive received chip oversampling vectors of a symbol interval. PIPSAR techniques are used to estimate channel parameters. The correlation between the successive periods is considered to further improve the performance of the proposed scheme. Analysis and simulations are used to evaluate the performance of the proposed scheme. Copyright © 2004 John Wiley & Sons, Ltd.