Application Research Of Network Coding And Cooperative Communication Based On Space-time Code In LTE Uplink

With the rapid development of wireless communication technologies, The reliabilityrequirements of the wireless communication technologies increases constantly. Cooperativecommunications has proved to be an efficient solution to reduce the problem. The mainprinciple is that in order to complete the distributed communication, users cooperate witheach other. So we can obtain gain as a multi-antenna system. If the multi-antennaimplemented on the mobile terminal, some of the limitations of the MIMO technology hasbeen overcome, the transmission capacity of the system and channel capacity are improved,so that our communications can enhance convenient. Network coding can improve therobustness and capacity of the system, when a huge number of users in the network, networkcongestion problem can be resolved. After combined with network coding and cooperativediversity, system performance can improve.This article focuses on the study of LTE uplink multi-user MIMO. It leads to cooperativecommunication,described the cooperative diversit, and compared the performance of thethree kinds of collaborative scheme. After that, a new code collaboration scheme is proposed,That is code collaboration based on no short loop QC-LDPC code. And compared theperformance of three collaborative scheme. The simulation result show that the new codecollaboration scheme has a good performance.Secondly, the new code collaboration program combined with network code andAlamouti Space-time code respectively. Then the paper discuss the models program andmodel. The simulation results show that the combination of cooperative diversity and someother technology, system performance can be further improved, and can take full advantageof these technologies.Finally, try to combine the Alamouti space-time code, network coding and cooperativediversity. This paper puts forward two association scheme and the system model, The firstscheme is network coding cooperative technique based on Alamouti space-time code, that iscombine the Alamouti space-time code, network coding and cooperative diversity. Thesimulation results show that this scheme can improve system performance. The secondscheme is network coding Cooperative technique based on QC-LDPC code, that is combine the Alamouti space-time code, network coding and coding Cooperative based on QC-LDPCcode. And system performance simulation results show that the program can also make thesystem performance greatly improved. While this scheme due to the use of the QC-LDPCcode, so that the system performance is improved more significantly. In the case of the poorcondition of the channel between two users, this program is more excellent performance. Itcan be seen that these two scheme can be improve the performance of the system. At thesame time to obtain diversity gain and coding gain. LTE uplink MIMO technology is nospecific way to achieve a result, the two programs can become a candidate technologies.