Repeated MCIK-OFDM with Enhanced Transmit Diversity Under CSI Uncertainty

Thien Van Luong, Youngwook Ko, Jinho Choi

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8 Citations (Scopus)
156 Downloads (Pure)

Abstract

This paper investigates the opportunity for a repetition coded Multi-Carrier Index Keying - Orthogonal Frequency Division Multiplexing (MCIK-OFDM), termed as repeated MCIK-OFDM (ReMO), which can provide a superior performance over existing schemes at the same spectral efficiency. Unlike the classical scheme, the proposed scheme activates a subset of sub-carriers and modulates them with the same M- ary data symbol, while additional information is conveyed by the active sub-carrier indices. This approach not only provides the frequency diversity gains in the M-ary symbol detection but also improves the index detection, leading to a considerable improvement in the transmit diversity. For performance analysis, we derive tight, closed-form expressions for the symbol error probability (SEP) and the bit error rate (BER), under both the perfect and imperfect channel state information (CSI). These expressions provide an insight into the achievable performance gains, system designs and impacts of various CSI conditions. Finally, simulation results are given to illustrate the superior performance achieved by our scheme over existing schemes under different CSI uncertainties.
Original languageEnglish
Pages (from-to)4079 - 4088
JournalIEEE Transactions on Wireless Communications
Volume17
Issue number6
Early online date03 Apr 2018
DOIs
Publication statusPublished - Jun 2018

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  • Student Theses

    Reliable and Low-Complexity Multicarrier Systems

    Author: Luong, T. V., Jul 2020

    Supervisor: Ko, Y. (Supervisor) & Matthaiou, M. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy

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