Space-time chip equalization for maximum diversity space-time block coded DS-CDMA downlink transmission

Authors:
Geert Leus;Frederik Petré;Marc Moonen
Affiliations:
Faculty of Electrical Engineering, Mathematics, and Computer Science, Delft University of Technology, Delft, The Netherlands;Wireless Research, Interuniversity Micro-Electronics Center (IMEC), Leuven, Belgium;Department of Electrical Engineering (ESAT), Katholieke Universiteit Leuven (K.U.Leuven), Leuven, Belgium
Venue:
EURASIP Journal on Applied Signal Processing
Year:
2004

Citing 9
Cited 1

WCDMA for UMTS: Radio Access for Third Generation Mobile Communications

WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
Downlink Specific Linear Equalization for Frequency Selective CDMA Cellular Systems

Journal of VLSI Signal Processing Systems
Adaptive Interference Suppression for the Downlink of a Direct Sequence CDMA System with Long Spreading Sequences

Journal of VLSI Signal Processing Systems
On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas

Wireless Personal Communications: An International Journal
Space-time codes for high data rate wireless communication: performance criterion and code construction

IEEE Transactions on Information Theory
Space-time block codes from orthogonal designs

IEEE Transactions on Information Theory
Single-carrier space-time block-coded transmissions over frequency-selective fading channels

IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications

IEEE Journal on Selected Areas in Communications
A transmitter diversity scheme for wideband CDMA systems based on space-time spreading

IEEE Journal on Selected Areas in Communications

Energy Aware Algorithm and Implementation of SDR Oriented HSDPA Chip Level Equalizer

Journal of Signal Processing Systems

Quantified Score

Hi-index	0.00

Visualization

Abstract

In the downlink of DS-CDMA, frequency-selectivity destroys the orthogonality of the user signals and introduces multiuser interference (MUI). Space-time chip equalization is an efficient tool to restore the orthogonality of the user signals and suppress the MUI. Furthermore, multiple-input multiple-output (MIMO) communication techniques can result in a significant increase in capacity. This paper focuses on space-time block coding (STBC) techniques, and aims at combining STBC techniques with the original single-antenna DS-CDMA downlink scheme. This results into the so-called space-time block coded DS-CDMA downlink schemes, many of which have been presented in the past. We focus on a new scheme that enables both the maximum multiantenna diversity and the maximum multipath diversity. Although this maximum diversity can only be collected by maximum likelihood (ML) detection, we pursue suboptimal detection by means of space-time chip equalization, which lowers the computational complexity significantly. To design the space-time chip equalizers, we also propose efficient pilot-based methods. Simulation results show improved performance over the space-time RAKE receiver for the space-time block coded DS-CDMA downlink schemes that have been proposed for the UMTS and IS-2000 W-CDMA standards.