A Reduced-Complexity Detector for OFDMA/SC-FDMA-aided Space-Time Shift Keying

Kadir, Mohammad Ismat, Chen, Sheng and Hanzo, Lajos (2013) A Reduced-Complexity Detector for OFDMA/SC-FDMA-aided Space-Time Shift Keying. IEEE VTC 2013-Fall, Las Vegas, United States. 02 - 05 Sep 2013. 5 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

We propose a novel reduced-complexity detector for the orthogonal frequency division multiple access (OFDMA)/single-carrier frequency division multiple access (SC-FDMA)-aided space-time shift keying (STSK) architecture. STSK employing OFDMA/SC-FDMA has recently been shown to be beneficial in dispersive multiuser downlink/uplink scenarios. These schemes exhibit excellent performance at a considerably reduced decoding complexity. We can employ a single-stream maximum-likelihood (ML) detector, since a single dispersion matrix (DM) is activated at any signalling interval. In this paper, we propose a new detector, which is capable of further reducing the decoding complexity. The proposed detector is particularly suitable for STSK-based transmission over frequency-selective multiple-input multiple-output (MIMO) channels employing frequency-domain equalization (FDE). The complexity of the proposed scheme is quantified and it is observed that the scheme maintains its superior multiple-antenna performance at a significantly reduced complexity

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