BER performance improvement of V2I communication by using OFDM IM exploiting all subcarrier activation patternser

Abstract

One of the essential divisions of the fast developing field of vehicular technology is the vehicle to infrastructure (V2I) communications. The PHY layer of V2I is implemented by the IEEE 802.11p wireless standard, whose core is the Orthogonal Frequency Division Multiplexing (OFDM) due to its robustness against multipath fading. The recently developed technique called OFDM with Index Modulation (-IM) has a better BER performance than OFDM. A source of error in OFDM-IM is that it uses a subset of the all possible subcarrier activation patterns (SAPs). A latest modification is the OFDM-IMA, referring to OFDM-IM that uses all possible SAPs. In this paper, it is proposed to use OFDM-IMA with subcarrier-level interleaving to replace OFDM in the IEEE 802.11p. Computer simulation results show that the proposed system achieves significant BER improvement with respect to OFDM and OFDM-IM, when tested over standard V2I environments.