Performance analysis of OFDM-IM over Faded Shadowing Channel with co-channel interference

Orthogonal frequency division multiplexing with Index Modulation (OFDM-IM) has been used to transmit extra bits by indexing subcarriers using the ON-OFF keying modulation. In this paper, the closed-form of average bit error probability (ABEP) for BPSK and M-ary QAM modulations with OFDM-IM are derived in the absence and presence of co-channel interference (CCI) over composite Nakagami-m and Gamma (NG) shadowing channel. Simple closed-form expressions are introduced by using the Meijer G function. The theoretical results are validated through comparisons with existing research studies.