Time reversal time-domain synchronisation orthogonal frequency division multiplexing over multipath fading channels with significant tap delays
- Author(s): Hamada Esmaiel 1 and Danchi Jiang 1
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View affiliations
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Affiliations:
1:
School of Engineering , University of Tasmania , Hobart , Australia
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Affiliations:
1:
School of Engineering , University of Tasmania , Hobart , Australia
- Source:
Volume 2014, Issue 7,
July
2014,
p.
358 – 367
DOI: 10.1049/joe.2014.0064 , Online ISSN 2051-3305
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.
Inspec keywords: encoding; intersymbol interference; synchronisation; time-domain analysis; random sequences; multipath channels; OFDM modulation; fading channels; numerical analysis; correlation methods
Other keywords: Zadoff–Chu sequence; inter-block interference; pseudorandom 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
Subjects: Electromagnetic compatibility and interference; Radio links and equipment; Other numerical methods; Codes; Mathematical analysis
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