MIMO Precoding And Spatial Modulation Technology And Its Application In High Speed Mobile Communication System

As a key technology to improve the communication rate and capacity and solve the frequency resources scarce,especially in the closed-loop MIMO system,precoding MIMO system based on the channel state information of can effectively against interference,so that the capacity of the system has been significantly improved.Spatial modulation technology(SM)has been proposed in recent years,which combines the advantages of MIMO system,at the same time,the traditional in the time domain,frequency domain and code domain of signal processing is further extended to the space domain,effectively increase the spectrum efficiency.As one of the most important scenarios and requirements of future mobile communication,how to design an effective system transmission scheme is of great practical significance.In this paper,we combine the MIMO precoding technique and the multi active antenna spatial modulation technology(MA-SM)to apply it to the high speed mobile scenarios in order to get better performance.Firstly,based on the model and mechanism of high-speed mobile MIMO communication system,this paper discusses the multi antenna spatial modulation technology related to MIMO technology and introduces the detection method of spatial modulation.For MIMO precoding techniques,focusing on the closed-loop MIMO system,this paper studies linear precoding,discusses the transmission of the filter design and based on singular value decomposition(SVD)and its improved algorithm of a MIMO precoding system and the simulation analysis the performance of the algorithm are presented.Then,based on the existing Multiple Active-Spatial Modulation linear detection algorithm,this paper proposes a sort of list MA-SM detection algorithm.Compared with the existing detection algorithms,the proposed algorithm can improve the performance of BER with a small amount of computational complexity.Finally,by combing the MIMO precoding technique and MA-SM low complexity list detection algorithm,the transmitter end use MIMO precoding based MA-SM technology,while the receiver use list detection algorithm,which is applied in high speed mobile communication system simulation and design.And the simulation experiment results show that:MA-SM technology combined with precoding technology effectively reduce the interference between the receiving antenna and improve the reliability of high-speed mobile communication system.