Improved Spectral Efficiency of Spatial Modulation

摘要

In this paper, we deal with Spatial Modulation (SM) communication system. One of the drawbacks of SM is its limitation in increasing the data rates. Hence, we propose a Modified Spatial Modulation Multiple-Input Multiple-Output scheme (MSM-MIMO) to enhance the spectral efficiency compared to the conventional scheme. In this proposal, we add a new source information carrying which consist in using a battery of predefined orthogonal waveforms. Obtained results are promising and outperforms the ones of conventional SM in terms of bit error rate (BER) and spectral efficiency. Furthermore, an analytical lower bound of the new system's capacity has been derived.