Vector Channel Estimation and Multiuser Detection for Multicarrier DS CDMA in Time and Frequency Selective Fading Channels

Authors:
Shu-Ming Tseng
Affiliations:
Department of Electronic Engineering, National Taipei University of Technology, Taipei, Taiwan 106
Venue:
Wireless Personal Communications: An International Journal
Year:
2007

Citing 4
Cited 1

Fuzzy two-stage carrier synchronization

Fuzzy Sets and Systems
Adaptive fuzzy frequency estimator with applications in fading communication channels

Fuzzy Sets and Systems
Finite amount of data effects in spatio-temporal filtering for equalization and interference rejection in short burst wireless communications

Signal Processing - Special section on signal processing technologies for short burst wireless communications
Multiuser Detection

Multiuser Detection

Performance evaluation for conventional and MMSE multiuser detection algorithms in imperfect reception conditions

Digital Signal Processing

Quantified Score

Hi-index	0.00

Visualization

Abstract

In a multicarrier direct-sequence code-division multiple access (MC DS CDMA) system, different fading channels for different users and/or different carriers are correlated in general; thus a vector channel model is more appropriate than disjoint scalar channel models. For multiuser MC DS CDMA systems, we propose (1) a generalized vector autoregressive model which accounts for correlation between different user/carrier fading channels, (2) the use of a two-phased algorithm to obtain the proposed model's parameters, and (3) a receiver structure that consists of a generalized decorrelator followed by maximal-ratio combining (MRC) of uncorrelated carrier channel outputs of each user. The estimated fading coefficients provide the necessary quantities to MRC. The computer simulation results show that the proposed scheme has performance close to the case in which the channel is perfectly known, and outperforms separate scalar channel estimation case.