Iterative joint data detection and channel estimation of DS/CDMA signals in multipath fading using the SAGE algorithm
Alexander Kocian, Bin Hu, Christian Rom, P. Sorensen, Bernard H. Fleury, E. Knudsen H.F. Poulsen · 2004
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.