5G时代广义空间调制的机遇与挑战研究

Opportunities and Challenges of Generalized Spatial Modulation in the Era of 5G

广义空间调制是空间调制的一般性推广。广义空间调制作为一种新的MIMO调制技术能降低MIMO系统中多天线带来的高功耗和系统的复杂度。为了研究大规模MIMO系统中广义空间调制与空间调制性能对比,通过计算机仿真研究了采用广义空间调制与空间调制的大规模MIMO系统的性能。在瑞利信道下分别对不同天线数目性能进行了研究,并且分析广义空间调制与空间调制在瑞利信道的性能差异。结果表明,在相同频谱效率下,广义空间调制的性能优于空间调制,而且当天线数目增大时广义空间调制的优势更加明显。

Generalized spatial modulation（GSM） is the generalized promotion of spatial modulation（SM）. As a new MIMO modulation technique, GSM can reduce the high power consumption and system complexity resulted from multi-antenna of MIMO system. In order to compare performances of GSM and SM in massive MIMO system, performances of massive MIMO systems using GSM and SM techniques were studied by means of computer simulations. Performances with different numbers of antennas in Rayleigh channel were compared, and then performance differences of GSM and SM were analyzed. Results demonstrate that under the same spectral efficiency, the performance of GSM is better than SM, and it is more obvious when the number of antennas increases.