IEEE Transactions on Communications · 1999 · 563 citations · 9 references
EngineeringCommunicationElectrical EngineeringDigital CommunicationInformation TheoryWireless CommunicationsChannel CodingChannel EstimationDigital Signal ProcessingInterference ManagementMultipath PropagationWireless Channel ModelingBit Error RateBit-error Rate AnalysisChannel Impulse ResponseChannel Impulse Response AnalysisEqualizationMultipathMultipath FadingOrthogonal Frequency-division Multiplexing
A loss of subchannel orthogonality due to time-variant multipath channels in orthogonal frequency division multiplexing (OFDM) systems leads to interchannel interference (ICI) which increases the error floor in proportion to the Doppler frequency. A simple frequency-domain equalization technique which can compensate for the effect of ICI in a multipath fading channel is proposed. In this technique, the equalization of the received OFDM signal is achieved by using the assumption that the channel impulse response (CIR) varies in a linear fashion during a block period and by compensating for the ICI terms that significantly affect the bit-error rate (BER) performance.
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