Multiple-Input Multiple-Output Multiple-Mode OFDM With Index Modulation

Multiple-mode orthogonal frequency division multiplexing with index modulation (MM-OFDM-IM) has been proposed as a novel IM technique, which conveys information via the permutation of multiple distinguishable constellations. In this paper, we propose a novel multiple-input multiple-output MM-OFDM-IM (MIMO-MM-OFDM-IM) scheme by combining MM-OFDM-IM and MIMO to take advantage of both techniques collectively. The low complexity detections, such as minimum mean square error (MMSE) Viterbi-like and MMSE subcarrier-wise log-likelihood ratio (MMSE-LLR), are proposed to largely reduce the receiver detection complexity. Besides, the theoretical analyses on bit error rate (BER) is also derived in closed-form to evaluate the performance of MIMO-MM-OFDM-IM. Considering different system configurations, it is shown via Monte Carlo simulations that the proposed MIMO-MM-OFDM-IM scheme not only achieves higher SE but also provides better error performance than the conventional schemes.

Automated summary

A novel multiple-input multiple-output MM-OFDM-IM (MIMO-MM-OFDM-IM) scheme is proposed in this paper by combining MM-OFDM-IM and MIMO techniques. Low complexity detection methods are introduced to reduce the receiver complexity, and theoretical analysis on bit error rate (BER) is derived to evaluate the performance. Monte Carlo simulations show that the proposed scheme achieves higher spectral efficiency and better error performance compared to conventional schemes.