In this paper, a spatial modulation (SM) which provides no synchronization between the transmitting antennas and avoids inter-channel interference (ICI) at the receiver input while maintaining high spectral efficiency is applied to filtered-orthogonal frequency division multiplexing (F-OFDM) transmission. The SM technique maps a block of information bits into two information carrying units, namely, a symbol chosen from a signal constellation diagram and a unique antenna number selected from the set of transmit antennas. Therefore, for F-OFDM wireless transmission, each subcarrier within the subband is mapped to one of the transmitting antennas. During wireless data transmission, there is only one active antenna transmitting power on that subcarrier at an instant of time and the rest of the antennas remains silent (zero power). At the receiver, a maximum-likelihood (ML) detector recovers the transmitted block of information bits by estimating the transmitted signal and the respective transmit antenna number. The effectiveness of the proposed method is verified using numerical results.
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