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Praise for Fundamentals of WiMAX

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11.1 Methodology <strong>for</strong> Link-Level Simulation 367TransmitterAntenna 1 PilotsSubcarrierMappingIFFTD/AFilterAntenna 1In<strong>for</strong>mationSourceChannelCodingandInterleavingSymbolMappingS/PSpace/TimeEncodingPrecodingSubcarrierMappingIFFTD/AFilterAntenna NtAntenna Nt PilotsController:* Modulation* Code Rate* Space/Time Encoding Matrix* Precoding Matrix* Subchannel AllocationEffective SINR FeedbackShort-Term FeedbackLong-Term FeedbackReceiverReference Signal from TransmitterAntenna 1A/DFilterFrom MIMO ChannelFFTSubcarrierSubchannelDemappingDataDataPilotsMIMOReceiverChannelDecoding andDeinterleavingError RateCalculatorAntenna NrA/DFilterFFTSubcarrierSubchannelDemappingEstimatedParametersPreamblePreamblePilotsChannel EstimationChannel TrackingNoise EstimationSpatial Correlation EstimationCQICH and MIMO CalculationsFigure 11.1 Link-level simulator <strong>for</strong> <strong>WiMAX</strong>The transmitter is responsible <strong>for</strong> all digital and analog domain processing <strong>of</strong> the signalbe<strong>for</strong>e it is sent over the wireless channel: channel encoding, interleaving, symbol mapping, andspace/time encoding. When closed-loop MIMO is used, the transmitter also applies a linear precodingmatrix and/or an antenna-selection matrix, if applicable. To create the signal in the frequencydomain, the transmitter maps the data and pilot signals <strong>of</strong> each subchannel onto the

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