Time reversal time-domain synchronisation orthogonal frequency division multiplexing over multipath fading channels with significant tap delays

The Journal of Engineering

Hamada Esmaiel¹  Danchi Jiang¹ 

[1] School of Engineering, University of Tasmania, Hobart, Australia

关键词: Zadoff–Chu sequence;    inter-block interference;    pseudor;    om noise-sequence padding;    TR-OFDM;    cyclic prefix;    time-dispersive fading channels;    numerical simulations;    training sequence;    time-reversed orthogonal frequency division multiplexing;    correlation based coder;    perfect autocorrelation property;    time reversal time-domain synchronisation;    single-input multiple-output communications;    multipath fading channels;    passive time reversal processing;    channel time dispersion reduction;    significant tap delays;    inter-symbol interference;   

DOI  :  10.1049/joe.2014.0064

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

Time-reversed orthogonal frequency division multiplexing (TR-OFDM) has recently received attention as a promising spectral efficient scheme for single-input multiple-output communications over time-dispersive fading channels. For TR-OFDM, passive time reversal processing is used as a simple means for channel time dispersion reduction. In particular, pseudorandom noise (PN)-sequence padding time-domain synchronisation OFDM (TDS-OFDM) transmission scheme has been reported as an appealing alternative to the traditional cyclic prefix (CP) OFDM technology as it can provide significant improvement in the spectrum efficiency. In this study, a new correlation based coder for inter-block and inter-symbol interference removing in time-reversed TDS-OFDM, which is denoted TR-TDS-OFDM briefly is proposed. Such a coder is, then, tested for multipath channels with significant tap delays. A Zadoff–Chu sequence with perfect autocorrelation property is adopted as a training sequence (TS) for a TDS-OFDM system. Simulation results show that, by using TR-TDS-OFDM with correlation-based coder, a TS with length shorter than channel order can be used without introducing notable inter-block interference. The other merits of the proposed design are also supported by both theoretical analysis and numerical simulations.

【 授权许可】

CC BY