Title :
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
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;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1291950
