Golden Angle Modulation Aided OFDM-IM for an Arbitrary Number of Subcarriers

In this letter, we propose golden angle modulation aided orthogonal frequency division multiplexing with index modulation (OFDM-IM-GAM) for an arbitrary number of subcarriers, which includes integer OFDM-IM-GAM (I-OFDM-IM-GAM) and fractional OFDM-IM-GAM (F-OFDM-IM-GAM). Furthermore, a general mapping optimization algorithm is developed for our proposed systems, where it is implemented by minimizing the hamming distance (HD) of transmission vectors with larger values of pairwise error probability (PEP) to minimize average bit error probability (ABEP). The simulation results illustrate the superiority of the I-OFDM-IM-GAM and F-OFDM-IM-GAM systems with the proposed mapping optimization algorithm over the conventional counterparts in the cases of uncoded and coded systems.