Unified Error-Rate Analysis of OFDM over Time-Varying Channels

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Orthogonal frequency division multiplexing (OFDM) transmission over mobile communication channels is very sensitive to time variations due to Doppler spreading. Time variations within the transmission time of one OFDM block destroy the orthogonality among the subcarriers giving rise to interchannel interference (ICI) which degrades the performance of OFDM over fast fading channels. Error rate analysis of OFDM in the presence of ICI is not trivial due to the cross-correlation between the ICI and the useful signal components. Based on accurate statistical models of the ICI, this paper presents a new accurate non-direct analytical method which simplifies greatly performance evaluation of OFDM in the presence of ICI. This results in new unified expressions for bit and symbol error rates of multilevel quadrature amplitude modulation (MQAM) and M-ary phase shift keying (MPSK) based OFDM communication systems over fast Rayleigh multipath fading channels. These results are further extended to include error rate analysis of OFDM with transmit diversity techniques.
    Original languageEnglish
    Article number5934346
    Pages (from-to)2692-2702
    Number of pages11
    JournalWireless Communications, IEEE Transactions on
    Volume10
    Issue number8
    DOIs
    Publication statusPublished - Aug 2011

    Keywords

    • Doppler shift
    • OFDM modulation
    • Rayleigh channels
    • adjacent channel interference
    • diversity reception
    • error statistics
    • mobile communication
    • multipath channels
    • phase shift keying
    • quadrature amplitude modulation
    • time-varying channels
    • BER
    • Doppler spreading
    • M-ary phase shift keying
    • MPSK
    • OFDM transmission
    • QAM
    • bit error rates
    • fast Rayleigh multipath fading channels
    • interchannel interference
    • mobile communication channels
    • multilevel quadrature amplitude modulation
    • nondirect analytical method
    • orthogonal frequency division multiplexing
    • statistical models
    • symbol error rates
    • transmit diversity techniques
    • unified error-rate analysis
    • Analytical models
    • Bit error rate
    • Doppler effect
    • Interference
    • OFDM
    • Signal to noise ratio
    • Communication system performance
    • error analysis
    • fading channels
    • interference
    • orthogonal frequency division multiplexing (OFDM)

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