  This paper analyzes the bit error rate (BER) of multicarrier index keying -
orthogonal frequency division multiplexing (MCIK-OFDM) with selection combining
(SC) diversity reception. Particularly, we propose a generalized framework to
derive the BER for both the low-complexity greedy detector (GD) and maximum
likelihood (ML) detector. Based on this, closedform expressions for the BERs of
MCIK-OFDM with the SC using either the ML or the GD are derived in presence of
the channel state information (CSI) imperfection. The asymptotic analysis is
presented to gain helpful insights into effects of different CSI conditions on
the BERs of these two detectors. More importantly, we theoretically provide
opportunities for using the GD instead of the ML under each specific CSI
uncertainty, which depend on the number of receiver antennas and the M-ary
modulation size. Finally, extensive simulation results are provided in order to
validate our theoretical expressions and analysis.
