BER Performance of Antenna Sequence Modulation (ASM)

In this study we propose a novel communication scheme of conveying additional spatial information through antenna sequences. The additional information is conveyed through fading channels such as Rayleigh fading. The sequence in which the three antennas transmit a symbol over the three time slots is used to convey additional information, over and above that carried by the symbol. We show that in this way, three antennas can be used to convey at least 4 bits in the spatial and signal domain. We present simulated results for both BPSK and 4QAM modulation schemes. Using information theoritic criteria, we derive the analytical expressions of the bit error rate and compare the results with those obtained through Monte Carlo simulations. The theoritical and simulated results closely match each other. We conclude that this method improves spectral efficiency and has a better BER performance compared to the conventional Spatial Modulation (SM).