Research On The Spatially Modulation For 60GHz Millimeter Wave Communications

As a short-range wireless communications technology can provide communication rate gigabit communication rate,60GHz millimeter-wave communication technology has a few advantages,such as strong anti-interference,high security,easy miniaturization integration and so on.So,60GHz millimeter-wave communication technology has become a hot research field of communications.The research content about this paper comes from national major science and technology(No.61271180).In this paper,we will combat the nonlinear distortions caused by the non-ideal or imperfect radio-frequency(RF)amplifiers,and improve the spectrum utilization of 60GHz millimeter-wave transmission systems.The main work and achievements of this paper as follows:(1)In this paper,a promising spatial modulation scheme for the emerging 60GHz millimeter wave communications is suggested,which is mainly designed to improve the system capacity.The scheme can achieve(nT-2+log2M)bpcu,and significantly improve the transmission performance of the system.(2)Based on spatial modulation scheme,this paper suggests an offline optimization scheme,which is mainly designed to combat the nonlinear distortions.This scheme,relying on some specific rules amending the distribution of the spatial constellation points,is designed to enhance the transmission performance.(3)This paper also proposed an optimization scheme based on the variance of characteristics,which is mainly designed to impove the lower transmission efficiency of off-line optimization scheme.without the assistance of any additional processing,this scheme discover the relationship of bit error rate and variance of output code word,to further improve the system capacity and also combat the nonlinear distortions.The main content and structure arrangements are as follows:The first chapter introduces the research status and research background of 60GHz millimeter-wave communications technology.The second chapter analyzes the MIMO and spatial modulation technology and proposes expansion of the spatial modulation techniques to deal with the shortcomings of traditional spatial modulation lower spectrum utilization and low utilization of the antenna.The third chapter introduces the channel characteristics,nonlinear amplifier model and existing methods to deal with nonlinear.In the fourth chapter,we firstly introduce the system model 60GHz millimeter communication system.Then we suggest an offline optimization scheme,which is mainly designed to combat the nonlinear distortions.This scheme,relying on some specific rules amending the distribution of the spatial constellation points,is designed to enhance the transmission performance.In the fifth chapter,we propose an optimization scheme based on the variance of characteristics,which is designed to impove the lower transmission efficiency of off-line optimization scheme.Sixth chapter summarized and pointed out some shortcomings of current research,and the future direction of improvement.