Iterative joint data detection and channel estimation of DS/CDMA signals in multipath fading using the SAGE algorithm

Author

Kocian, A. ; Hu, B. ; Rom, C. ; Sørensen, P. ; Fleury, B.H. ; Poulsen, E.K.

Author_Institution

Dept. of Commun. Technol., Aalborg Univ., Denmark

Volume

1

fYear

2003

fDate

9-12 Nov. 2003

Firstpage

443

Abstract

The paper presents two iterative multiuser detection and channel estimation (JDE) receivers of tractable complexity for downlink transmission using beamforming. The receivers results from an application of the space-alternating generalized expectation-maximization (SAGE) algorithm and a modified version. The proposed JDE schemes update the channel parameters in parallel and re-estimates the users´ symbols in successive order. Monte Carlo simulations in a frequency-selective scenario show that the JDE schemes are robust against errors in the estimation of the channel coefficients.

Keywords

Monte Carlo methods; channel estimation; code division multiple access; fading channels; iterative methods; multipath channels; multiuser detection; optimisation; radio receivers; spread spectrum communication; DS-CDMA signal; Monte Carlo simulation; beamforming; channel estimation receiver; direct sequence code division multiple access; frequency-selective scenario; iterative data detection; iterative multiuser detection; multichannel estimation; multipath fading; space-alternating generalized expectation-maximization; Array signal processing; Channel estimation; Downlink; Estimation error; Fading; Frequency estimation; Iterative algorithms; Multiaccess communication; Multiuser detection; Robustness;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on

Print_ISBN

0-7803-8104-1

Type

conf

DOI

10.1109/ACSSC.2003.1291950

Filename

1291950