Özet:

OFDM-IM (Orthogonal Frequency Division Multiplexing with Index Modulation) as one of the candidate transmission techniques for 5G (Fifth Generation) and beyond communication systems, many studies have been carried out in recent yeaars. In the OFDM-AIM (OFDM with All Index Modulation) technique, which has developed to increase the spectral efficiency of the OFDM-IM, unlike the OFDM-IM which has empty sub-carriers, all sub-carriers are active. In this article, Ant Colony Optimization (ACO) algorithm based sub-block set design (ACO-OFDM-AIM) is proposed to improve the bit error rate (BER) performance of the OFDM-AIM. In the OFDM-AIM technique, data bits are matched with PSK/QAM constellation points, while in the KKO-OFDM-AIM technique, the entire PSK/QAM constellation space can be determined as possible mapping points in order to increase diversity gain. In the ACO-OFDM-AIM technique, the matching points with the highest fitness value are determined by the ACO algorithm and a sub-block set is created. In simulation studies, the ACO-OFDM-AIM technique is compared with OFDM, OFDM-IM, OFDM-AIM, and GA-OFDM-AIM (Genetic algorithm-based OFDM-AIM) techniques and it is seen that ACO-OFDM-AIM has the best BER performance.