subcarriers but also indices of the subcarriers. In this paper a novel low-complexity detection
scheme of subcarrier indices is proposed for an MCIK system and addresses a substantial
reduction in complexity over the optimal maximum likelihood (ML) detection. For the
performance evaluation, a closed-form expression for the pairwise error probability (PEP) of
an active subcarrier index, and a tight approximation of the average PEP of multiple …