We examine a multiple-access AWGN channel with synchronous DS-CDMA in which the channel amplitude and noise variance parameters are unknown a priori. We derive an iterative joint multiuser decoder and parameter estimator based on soft interference cancellation and on soft decision-driven least-squares estimation. Our derivation is obtained by applying the sum-product algorithm to the factor graph of the joint a posteriori probability measure of the information bits and of the unknown channel parameters.
Iterative multiuser joint detection and parameter estimation: A factor-graph approach / Caire, G.; Tulino, A.; Biglieri, E.. - (2001), pp. 36-38. (Intervento presentato al convegno 2001 IEEE Information Theory Workshop, ITW 2001 tenutosi a Cairns International Hotel, aus nel 2001) [10.1109/ITW.2001.955128].
Iterative multiuser joint detection and parameter estimation: A factor-graph approach
Tulino A.;
2001
Abstract
We examine a multiple-access AWGN channel with synchronous DS-CDMA in which the channel amplitude and noise variance parameters are unknown a priori. We derive an iterative joint multiuser decoder and parameter estimator based on soft interference cancellation and on soft decision-driven least-squares estimation. Our derivation is obtained by applying the sum-product algorithm to the factor graph of the joint a posteriori probability measure of the information bits and of the unknown channel parameters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
