Implementation Of System Level Simulation Platform For The Downlink Of LTE-Advanced System And Its Techniques' Study

With the maturation of the 3G wireless communication technologies, ITU defines a new IMT-Advanced system in order to better meet market demand of rapid development. Compared to the 3G, the IMT-Advanced allows the use of more revolutionary technologies to achieve higher performance. ITU-R has issued a Global Call for IMT-Advanced technology circular, some technical camps began to submit proposals for IMT-Advanced technologies from the end of 2008. As the current most talked about broadband mobile communications standard, the further evolution of 3GPP LTE to the IMT-advanced stage of evolution is beyond question. In October 2008,3GPP stated to the ITU that LTE-Advanced will be submitted to the ITU-R as a candidate for IMT-Advanced technology. If LTE can be seen as "quasi-4G" technologies, LTE-Advanced is the aptly-named "4G" technology, because the start of this work is to satisfy the nominal ITU-R IMT-Advanced technology requirements.This research project is a pre-research work belonging to the China Academy of Telecommunication Research of the Ministry of Industry and Information Technology. It mainly targets at the IMT-Advanced wireless communication network. In this project, we designed and implemented the 3GPP LTE-Advanced simulation platform. Based on this simulation platform, assessments on the key technologies and system performance were done to serve to the standard-setting work.First, the Paper outlines the evolution trends of LTE-Advanced key technologies, and described aims and methods of system level simulation briefly. Then the paper introduced the design of system level simulation platform of LTE-Advanced downlink system by giving the parameters and composed modules of the platform, and described the building of two kinds of channel models.Finally the simulation results of multi-user MIMO showed that the multi-user MIMO can bring even greater performance. Especially This paper presents several DL CoMP-JP schemes to LTE-Advanced and corresponding system level performance evaluation which show that the CoMP joint processing can bring significant gains to both the average sector throughput and the 5% of user throughput.