IEEE Communications Letters · 2008 · 273 citations · 7 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationInformation TheoryWireless CommunicationsBeamformingChannel CodingChannel EstimationChannel Performance AnalysisWireless Channel ModelingWireless NetworksChannel State InformationEigenvectorsMean Squared ErrorMean Squared Error EstimationMimo SystemsMinimum Mean Square Error Channel EstimationRelay ChannelTransceiver Design
In this letter, we address the problem of transceiver design in a non-regenerative MIMO relay system, where linear processing is applied at both the relay and destination to jointly minimize the mean-squared error (MSE) of symbol estimations. Under average power constraint at the relay station, we show that the optimal relay-precoder always loads power across channel eigenvectors and then decomposes the equivalent MIMO channel into a set of parallel SISO channels. Simulation results demonstrate that our method outperforms other relaying schemes in terms of both BER and MSE.
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