IEEE Communications Letters · 2014 · 27 citations · 10 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationInformation TheoryWireless CommunicationsChannel CodingChannel EstimationChannel Performance AnalysisCommunication NetworksResource AllocationWireless Channel ModelingChannel AllocationChannel State InformationNetwork Throughput AnalysisNetwork Throughput OptimizationPower AllocationRadio Resource AllocationRadio Resource ManagementThroughput
This letter investigates the effect of imperfect channel state information (CSI) on the performance of radio resource management for a downlink multi-user OFDMA system. It is shown that the imperfect CSI introduces a signal-and-power dependent noise term, which makes the symbol error rate (SER) constellation-point dependent, and yields an error floor on the SER. In addition, a two-step multi-user channel, power and constellation allocation algorithm is proposed to maximize the total network throughput.
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