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This paper analyzes a channel estimation error propagation problem for a two-hop amplify-and-forward (AF) relaying system using two-phase. Channel estimator in each phase is obtained by the linear minimum mean squared error (LMMSE) method. The inaccuracy of estimation of the relay-to-destination (RtD) channel in the first phase affects the estimation of the source-to-relay (StR) channel in the second...
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