Quadrature Spatial Modulation Performance Analysis over Rician Fading Channels

Abstract—Quadrature Spatial Modulation (QSM) is a recently proposed Multiple-Input Multiple-Output (MIMO) transmission technique. In QSM, location dependent spatial information utilized to carry additional bits is expanded to include quadrature dimension in addition to the conventional SM real dimension. As such, an increase of the overall transmission data rate with base two logarithm of the square of the number of existing transmit antennas is achieved. In this paper, first, QSM performance over Rician fading channel is investigated, second, analytical framework supported by Monte Carlo simulation is established, and third, detailed results highlighting the impact of LOS on QSM performance are presented. Obtained analytical and simulation results show that QSM outperforms SM over Rician fading channels.