Orthogonal Frequency Division Multiplexing With Index Modulation

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Date

2013

Authors

Başar, Ertuğrul
Aygölü, Ümit
Panayırcı, Erdal
Poor, H. Vincent

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IEEE-INST Electrical Electronics Engineers Inc

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Abstract

In this paper a novel orthogonal frequency division multiplexing (OFDM) scheme called OFDM with index modulation (OFDM-IM) is proposed for operation over frequency-selective and rapidly time-varying fading channels. In this scheme the information is conveyed not only by M-ary signal constellations as in classical OFDM but also by the indices of the subcarriers which are activated according to the incoming bit stream. Different low complexity transceiver structures based on maximum likelihood detection or log-likelihood ratio calculation are proposed and a theoretical error performance analysis is provided for the new scheme operating under ideal channel conditions. Then the proposed scheme is adapted to realistic channel conditions such as imperfect channel state information and very high mobility cases by modifying the receiver structure. The approximate pairwise error probability of OFDM-IM is derived under channel estimation errors. For themobility case several interference unaware/aware detection methods are proposed for the new scheme. It is shown via computer simulations that the proposed scheme achieves significantly better error performance than classical OFDM due to the information bits carried by the indices of OFDM subcarriers under both ideal and realistic channel conditions.

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Keywords

Frequency selective channels, Maximum likelihood (ML) detection, Mobility, Orthogonal frequency division multiplexing (OFDM), Spatial modulation

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Citation

734

WoS Q

Q1

Scopus Q

Q1

Source

Volume

61

Issue

22

Start Page

5536

End Page

5549