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Zero-padded tri-mode index modulation aided OFDM

Zero-padded tri-mode index modulation aided OFDM
Zero-padded tri-mode index modulation aided OFDM

Orthogonal frequency division multiplexing (OFDM) with index modulation has emerged as a promising complementary technique for next-generation networks due to its high energy efficiency. In this paper, zero-padded tri-mode index modulation aided OFDM (ZTM-OFDM) is proposed, where subcarriers are partitioned into subblocks. Explicitly, only a fraction of subcarriers are utilized for modulation with two distinguishable constellation alphabets in each OFDM subblock, whilst the others remain empty. By such strategy, additional bits can be conveyed by the subcarrier indices corresponding to the two constellation sets (denoted as index pattern). At the receiver, a maximum-likelihood (ML) detector and a two-stage log-likelihood ratio (LLR) detector with reduced complexity are proposed for demodulation. The proposed ZTM-OFDM is capable of enhancing the spectral and energy efficiency compared with other index modulated OFDM schemes. Theoretical analysis based on the minimum Euclidean distance and Monte Carlo simulation results validate that the proposed ZTM-OFDM can attain performance gain over conventional OFDM and other index modulated OFDM schemes.

energy efficiency, Index modulation, log-likelihood ratio detection, maximum-likelihood detection, orthogonal frequency division multiplexing, spectral efficiency
1-5
Institute of Electrical and Electronics Engineers Inc.
Mao, Tianqi
b0e1c806-8540-4a49-a523-6afc6ee7714e
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Quan, Jinguo
9a0f0783-4643-4e9d-9cb9-a148bbef677d
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Mao, Tianqi
b0e1c806-8540-4a49-a523-6afc6ee7714e
Wang, Qi
91220429-39a1-459a-9dfb-20fb90bfa974
Quan, Jinguo
9a0f0783-4643-4e9d-9cb9-a148bbef677d
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4

Mao, Tianqi, Wang, Qi, Quan, Jinguo and Wang, Zhaocheng (2018) Zero-padded tri-mode index modulation aided OFDM. In 2017 IEEE Global Communications Conference, GLOBECOM 2017 - Proceedings. vol. 2018-January, Institute of Electrical and Electronics Engineers Inc. pp. 1-5 . (doi:10.1109/GLOCOM.2017.8254931).

Record type: Conference or Workshop Item (Paper)

Abstract

Orthogonal frequency division multiplexing (OFDM) with index modulation has emerged as a promising complementary technique for next-generation networks due to its high energy efficiency. In this paper, zero-padded tri-mode index modulation aided OFDM (ZTM-OFDM) is proposed, where subcarriers are partitioned into subblocks. Explicitly, only a fraction of subcarriers are utilized for modulation with two distinguishable constellation alphabets in each OFDM subblock, whilst the others remain empty. By such strategy, additional bits can be conveyed by the subcarrier indices corresponding to the two constellation sets (denoted as index pattern). At the receiver, a maximum-likelihood (ML) detector and a two-stage log-likelihood ratio (LLR) detector with reduced complexity are proposed for demodulation. The proposed ZTM-OFDM is capable of enhancing the spectral and energy efficiency compared with other index modulated OFDM schemes. Theoretical analysis based on the minimum Euclidean distance and Monte Carlo simulation results validate that the proposed ZTM-OFDM can attain performance gain over conventional OFDM and other index modulated OFDM schemes.

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More information

Published date: 10 January 2018
Venue - Dates: 2017 IEEE Global Communications Conference, Singapore, Singapore, 2017-12-04 - 2017-12-08
Keywords: energy efficiency, Index modulation, log-likelihood ratio detection, maximum-likelihood detection, orthogonal frequency division multiplexing, spectral efficiency

Identifiers

Local EPrints ID: 420850
URI: http://eprints.soton.ac.uk/id/eprint/420850
PURE UUID: c6a3df72-75ad-419b-96da-0ebea61e600e
ORCID for Qi Wang: ORCID iD orcid.org/0000-0003-2645-5807

Catalogue record

Date deposited: 17 May 2018 16:30
Last modified: 04 Dec 2018 17:32

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