DCT-OFDM with Index Modulation

Marwa Chafii (1) , Justin P Coon (2) , Dene A Hedges (2)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 Department of Engineering Science

In this letter, index modulation (IM) is proposed for OFDM systems based on a discrete cosine transform (DCT) implementation. The new DCT-OFDM-IM scheme is shown to yield spectral efficiency improvements of up to 38% relative to OFDM-IM and up to 55% relative to OFDM while occupying the same bandwidth and maintaining similar robustness against frequency selective fading channels for low modulation orders.

Keywords: index modulation; Discrete cosine transform; orthogonal frequency division multiplexing; spectral efficiency

Domains: Signal and Image processing

Marwa Chafii, Justin P Coon, Dene A Hedges. DCT-OFDM with Index Modulation. IEEE Communications Letters, 2017, 21 (7), pp.1489-1492. ⟨10.1109/LCOMM.2017.2682843⟩. ⟨hal-01488900⟩