Bit Error Rate Reduction Using Orthogonal Frequency Division Multiplexing with Index Modulation

Abstract

This paper provides a novel orthogonal frequency division multiplexing (OFDM), called orthogonal frequency division multiplexing with index modulation (OFDM-IM). In this scheme the information is conveyed not only by M-ary signal constellations but also by the indices of the sub carriers. The error performance analysis is provided for this scheme operating under ideal channel conditions. Then the same procedures are applied for the realistic channel conditions such as imperfect channel state information and very high mobility cases. The Error performance analysis is provided for both zero mobility and very high mobility cases. This scheme provides better error performance than classical OFDM because in this scheme the information bits are carried by the indices of the subcarriers. It is shown via computer simulations.