OFDM-IM with Supply Index

In this paper, a novel orthogonal frequency division multiplexing with index modulation (OFDM-IM) scheme is proposed. In this scheme, the index pattern is composed of the original index pattern and the supply index pattern. This scheme increases the index information transmitted by multiplexing index patterns and makes the system suitable for low-complexity Log-likelihood ratio (LLR) detection algorithm. Simulation of the proposed system OFDM-1M with the supply index (OFDM-IM-SI) and OFDM-IM shows that they are almost equivalent in terms of bit error rate (BER) performance and OFDM-IM-SI can effectively improve the Spectrum Efficiency (SE) and Energy Efficiency (EE) of the system. The results and the features of the OFDM-IM-SI suggest it as a candidate alternative to conventional OFDM-IM.