Study On Lte System-Level Simulation Based On Matlab

With the integration of broadband wireless access technology and mobile communication constantly pacing up, many broadband wireless access technologies have emerged. In order to deal with the challenges and to ensure its own competitiveness,3GPP launched the LTE Project. A series of advanced technologies, for example, spectrum aggregation, cooperative multi-point, multi-antenna, multi-carrier modulation have been applied in the LTE system which improves significantly the system performance and air interface capacity and strongly ensures high-quality wireless access services for the users. However, due to the power and bandwidth constraints in actual application, how to better deploy and configure the LTE system is a critical problem that can’t be bypassed. Usually, system-level simulation is used to deal with this problem.This thesis firstly gives a brief introduction of the LTE system. Then, it focuses on the LTE system-level simulation platform, including the module division, module function and the platform’s workflow, etc. The performances of different resource scheduling algorithms are compared and analyzed by simulation on the well-built platform under different system configurations, and the VoIP and FTP services are simulated and analyzed briefly. Meanwhile, in order to get the ideal simulation accuracy and better system performance, three receivers, which are the Minimum Mean Square Error (MMSE), the Zero-Forcing Successive Interference Cancellation(ZF-SIC) and the Minimum Mean Squared Error with Successive Interference Cancellation (MMSE-SIC), have been added to the platform to have it improved. Besides, the principles and methods of the pre-coding technique in the LTE system have been studied, including the codebook design, optimal codeword selection algorithm and the codebook structure. Finally, a new codebook scheme has been put forward, which significantly reduces the overhead of the feedback channel and improves the system performance. The proposed pre-coding scheme is compared with the traditional ones through simulation.