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Index Modulation Pattern Design for Non-Orthogonal Multicarrier Signal Waveforms

Chen, Y; Xu, T; Darwazeh, I; (2022) Index Modulation Pattern Design for Non-Orthogonal Multicarrier Signal Waveforms. IEEE Transactions on Wireless Communications 10.1109/TWC.2022.3166850. (In press). Green open access

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Abstract

Spectral efficiency improvement is a key focus in most wireless communication systems and achieved by various means such as using large antenna arrays and/or advanced modulation schemes and signal formats. This work proposes to further improve spectral efficiency through combining non-orthogonal spectrally efficient frequency division multiplexing (SEFDM) systems with index modulation (IM), which can efficiently make use of the indices of activated subcarriers as communication information. Recent research has verified that IM may be used with SEFDM to alleviate inter-carrier interference (ICI) and improve error performance. This work proposes new SEFDM signal formats based on novel activation pattern designs, which limit the locations of activated subcarriers and enable a variable number of activated subcarriers in each SEFDM subblock. SEFDM-IM system designs are developed by jointly considering activation patterns, modulation schemes and signal waveform formats, with a set of solutions evaluated under different spectral efficiency scenarios. Detailed modelling of coded systems and simulation studies reveal that the proposed designs not only lead to better bit error rate (BER) but also lower peak-to-average power ratio (PAPR) and reduced computational complexity relative to other reported index-modulated systems.

Type: Article
Title: Index Modulation Pattern Design for Non-Orthogonal Multicarrier Signal Waveforms
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TWC.2022.3166850
Publisher version: https://doi.org/10.1109/TWC.2022.3166850
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Index modulation, waveform, multi-carrier, subcarrier pattern, inter-carrier interference, OFDM, SEFDM, non-orthogonal, spectral efficiency, PAPR
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL
URI: https://discovery.ucl.ac.uk/id/eprint/10148120
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