Repeated Index Modulation for OFDM Systems

1) Propose the repeated index modulation for OFDM with diversity reception using maximal ratio combining (MRC) and selection combining (SC) system, abv. as RIM-OFDM-MRC/SC. The closed-form and asymptotic expressions for error probability are derived and simulation results to validate the accuracy of theoretical analysis.
2) Propose and analyze the performance of the repeated index modulation for OFDM with coordinate interleaving (RIM-OFDM-CI) system, the closed-form and asymptotic expressions are derived to investigate the error performance of the proposed system. Propose the low-complexity detectors for RIM-OFDM-CI which achieves the near-optimal performance as ML detector.