Novel Approach of Spatial Modulation: Polarization-Aware OFDM Subcarrier Allocation

6th Generation (6G) wireless communication seriously considers energy efficient systems aligned with the green energy technology. The novel spatial modulation (SM) scheme utilizing the polarization domain is proposed to improve SM demodulation error rate. The cross-polarization discrimination (XPD) can be estimated via incorporating multi-polarized antenna elements at the receiver (Rx). The XPD enhances the performance in classification of antenna indices at the Rx. Further, the practical orthogonal frequency division multiplexing (OFDM) system is considered for SM; subcarrier allocation algorithm utilizing the XPD is proposed with remarkable improvement of the system performance in terms of SM error rate.