采用GSSK调制的MISO系统容量研究

ON CAPACITY OF MISO SYSTEM WITH GSSK MODULATION

GSSK是空间位移键控(SSK)的一般性推广,通过发射天线索引的组合传输信息,可以极大地降低多天线系统的复杂度。为研究采用GSSK调制技术的MISO无线通信系统的容量特性,从信息论的基本理论出发,通过数学计算和计算机仿真的方法研究了采用GSSK调制的MISO系统的容量。分别对瑞利衰落信道和莱斯衰落信道下的系统容量进行研究,并且比较了独立衰落信道和具有信道相关性的衰落信道在容量方面的不同。结果表明,采用的方法可以有效地计算系统容量。GSSK的系统容量与SNR和发射天线组合的数量密切相关。LOS分量及信道相关系性均会使GSSK的容量降低。

GSSK is the general promotion of the space shift keying（SSK）,which transmits information by the combination of transmit antennas indexes,and can reduce the complexity of multi-antenna system greatly.In order to research the capacity feature of MISO wireless communication system with GSSK,proceeding from the rationale of information theory,in this paper we study the capacity of MISO system with GSSK by mathematical calculation and computer simulation.The system capacities in condition of Rayleigh fading channel and Rice fading channel are studied respectively in the paper,and the difference in capacity with regard to the independent fading channel and the fading channel with channel correlation is also compared.Conclusion indicates that this method can calculate system capacity effectively.The capacity of MISO with GSSK is closely related to SNR and the number of antenna index combinations.LOS component and channel correlation can both reduce the capacity of GSSK.