| Multi-Carrier transmission technologie which takes OFDM as representative has been the key technologie of 4G. OFDM can resist the multipath effect effectively, and makes good use of frequency spectrum. It is suitable for transmitting high speed data under the wireless environment. SIMULINK is an expansion of MATLAB. It is a software packet that can carry out dynamic system modeling. It's model library contains a lot of models which can carry out different functions. This make researchers construct simulation system with clear function and reasonable structure expediently.The simulation platform of OFDM system based on SIMULINK is designed in this paper. And in this platform, we did relatively comprehensive simulation and performance analysis of sub-carrier modulation style, channel estimation arithmetic and synchronization arithmetic. It includes four main parts in this paper: fundamental principle and system constitution of OFDM, performance analysis of sub-carrier modulation style resisting channel interference, effect of channel estimation resisting channel interference and synchronization technologie.By researching OFDM system, We gain much valuable simulation information, such as performance parameters of different modulation style in multi-path channel, performance of channel estimation arithmetic in time field in different channels, and realization and analysis of ML synchronization arithmetic.These informations not only validate the capability of all parts, but also provide basis of system further improvement.In summary, this paper has completed the OFDM system simulation and provided the platform for OFDM technology research, and did analysis and research of almost all performances in this platform. It also has laid the foundation for studying and improving the OFDM system in the future. |
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