Bayesian Approach to Channel Estimation for AF MIMO Relaying Systems
Artikel i vetenskaplig tidskrift, 2012

In this paper, we investigate the problem of channel estimation in amplify-and-forward multiple-input multiple-output relaying systems operating over random wireless channels. Using the Bayesian framework, novel linear minimum mean square error and expectation-maximization based maximum a posteriori channel estimation algorithms are developed, that provide the destination with full knowledge of all channel parameters involved in the transmission. Moreover, new, explicit expressions for the Bayesian Cramer-Rao bound are deduced for predicting and evaluating the channel estimation accuracy. Our simulation results demo nstrate that the incorporation of prior knowledge into the channel estimation algorithm offers significantly improved performance, especially in the low signal-to-noise ratio regime.

mean-square error

capacity

Amplify-and-forward (AF)

channel estimation

information

amplify

expectation-maximization

design

Författare

Panagiota Lioliou

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Mats Viberg

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Michail Matthaiou

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

IEEE Journal on Selected Areas in Communications

0733-8716 (ISSN)

Vol. 30 8 1440-1451

Ämneskategorier

Telekommunikation

DOI

10.1109/jsac.2012.120913

Mer information

Senast uppdaterat

2021-02-18